CHAPTER 12
FUEL PIPING
1201.0 Scope of Gas Piping.
1201.1 (A) Coverage of Piping System. Coverage
of piping systems shall extend from the point of delivery to the appliance connections with each gas utilization device. For other than undiluted liquefied petroleum
gas systems, the point of delivery shall be considered the
outlet of the service meter assembly, or the outlet of the
service regulator or service shutoff valve where no meter
is provided. For undiluted liquefied petroleum gas systems, the point of delivery shall be considered the outlet
of the final pressure regulator, exclusive of the line gas regulators, in the system where no meter is installed. Where
a meter is installed the point of delivery shall be the outlet of the meter. [NFPA 54-12:1.1.1.1(A)]
1201.2 (B) Piping System Requirements. Piping
systems requirements shall include design, materials,
components, fabrications, assembly, installation, testing,
inspection, operation, and maintenance. [NFPA
54:1.1.1.1(C)]
1201.3 (C) Application. This code shall not apply to
the following (reference standards for some of which appear in Chapter 14 [NFPA 54-12:1.1.1.2]:
(1) Portable LP-Gas appliances of all types that are not
connected to a fixed fuel piping system.
(2) Installation of farm appliances and equipment such
as brooders, dehydrators, dryers, and irrigation
equipment used for agricultural purposes.
(3) Raw material (feedstock) applications, except for
piping to special atmosphere generators.
(4) Oxygen-fuel gas cutting and welding systems.
(5) Industrial gas applications using gases such as acetylene and acetylenic compounds, hydrogen, ammonia, carbon monoxide, oxygen, and nitrogen.
(6) Petroleum refineries, pipeline compressor or pumping stations, loading terminals, compounding plants,
refinery tank farms, and natural gas processing
plants.
(7) Large integrated chemical plants or portions of such
plants where flammable or combustible liquids or
gases are produced by chemical reactions or used in
chemical reactions.
(8) LP-Gas installations at utility gas plants.
(9) Liquefied natural gas (LNG) installations.
(10) Fuel gas piping in electric utility power plants.
[NFPA 54-09:1.1.1.2(10)]
(11) Proprietary items of equipment, apparatus, or instruments such as gas-generating sets, compressors,
and calorimeters.
(12) LP-Gas appliances for vaporization, gas mixing, and
gas manufacturing.
UNIFORM PLUMBING CODE
(13) LP-Gas piping for buildings under construction or
renovations that are not to become part of the permanent building piping system—that is, temporary
fixed piping for building heat.
(14) Installation of LP-Gas systems for railroad switch
heating.
(15) Installation of LP-Gas and compressed natural gas
systems on vehicles.
(16) Gas piping, meters, gas-pressure regulators, and other
appurtenances used by the serving gas supplier in distribution of gas, other than undiluted LP-Gas.
1202.0 General.
The regulations of this chapter shall govern the installation
of fuel gas piping in or in connection with any a building,
structure or within the property lines of any premises up to
five (5) psi (34.5 kPa), other than service pipe. Fuel oil piping systems shall be installed in accordance with NFPA 31.
1203.0 Definitions.
For the purposes of this code, these definitions shall apply to
this chapter. Certain terms, phrases, words, and their derivatives shall be interpreted as set forth in this section, provided,
however, that whenever the words “gas meters” appear, they
shall be construed to also mean valves and those devices required for the regulation of pressure and the measurement of
natural gas being dispensed for any building, structure, or
premises.
1203.1 Appliance Fuel Connector – An assembly of
listed semi-rigid or flexible tubing and fittings to carry fuel
between a fuel-piping outlet and a fuel-burning appliance.
1203.2 Bonding Jumper – A reliable conductor to ensure
the required electrical conductivity between metal parts required to be electrically connected. [NFPA 70:100.1]
1203.3 Fuel Gas – Natural, manufactured, liquefied petroleum, or a mixture of these.
1203.4 Gas Piping – Any installation of pipe, valves, or
fittings that is used to convey fuel gas, installed on any premises or in any building, but shall not include:
(1) Any portion of the service piping.
(2) Any approved piping connection six (6) feet (1,829 mm)
or less in length between an existing gas outlet and a gas
appliance in the same room with the outlet.
1203.5 Gas-Piping System – Any arrangement of gas piping or regulators after the point of delivery and each arrangement of gas piping serving a building, structure, or premises,
whether individually metered or not.
1203.6 Grounding Electrode – A device that establishes
an electrical connection to the earth.
171
FUEL PIPING
1203.7 Liquefied Petroleum Gas (LPG) Facilities –
Liquefied petroleum gas (LPG) facilities means tanks, containers, container valves, regulating equipment, meters,
and/or appurtenances for the storage and supply of liquefied
petroleum gas for any building, structure, or premises.
1203.8 Provision for Location of Point of Delivery –
The location of the point of delivery shall be acceptable to
the serving gas supplier. [NFPA 54:5.2]
1203.9 Quick-Disconnect Device – A hand-operated device that provides a means for connecting and disconnecting
an appliance or an appliance connector to a gas supply and
that is equipped with an automatic means to shut off the gas
supply when the device is disconnected.
1203.10 Service Piping – The piping and equipment between the street gas main and the gas piping system inlet that
is installed by, and is under the control and maintenance of,
the serving gas supplier.
1203.11 Transition Gas Riser – Any listed or approved
section or sections of pipe and fittings used to convey fuel
gas and installed in a gas piping system for the purpose of
providing a transition from below ground to above ground.
12043.0 Inspection.
12043.1 Inspection Notification. Upon completion of the
installation, alteration, or repair of any gas piping, and prior
to the use thereof, the Authority Having Jurisdiction shall be
notified that such gas piping is ready for inspection.
12043.2 Excavation. All eExcavations required for the installation of underground piping shall be kept open until such
time as the piping has been inspected and approved. If any
Where such piping is covered or concealed before such approval, it shall be exposed upon the direction of the Authority Having Jurisdiction.
12043.3 Type of Inspections. The Authority Having Jurisdiction shall make the following inspections and either
shall approve that portion of the work as completed or shall
notify the permit holder wherein the same fails to comply be
in accordance with this code.
12043.3.1 Rough Piping Inspection. This inspection shall be made after all gas piping authorized by the
permit has been installed and before any such piping has
been covered or concealed or any fixture or appliance
has been attached thereto. This inspection shall include a
determination that the gas-piping size, material, and installation meet the requirements of this code.
12043.3.2 Final Piping Inspection. This inspection
shall be made after all piping authorized by the permit
has been installed and after all portions thereof that are to
be covered or concealed are so concealed and before any
fixtures, appliance, or shutoff valve has been attached
thereto. This inspection shall be in accordance with Section 12143.1. Test gauges used in conducting tests shall
comply be in accordance with Section 319.0, Test
Gauges.
12043.4 Inspection Waived In cases where the work authorized by the permit consists of a minor installation of additional piping to piping already connected to a gas meter, the
172
foregoing inspections shall be permitted to be waived at the
discretion of the Authority Having Jurisdiction. In this event,
the Authority Having Jurisdiction shall make such inspection
as deemed advisable in order to be assured that the work has
been performed in accordance with the intent of this code.
12054.0 Certificate of Inspection.
12054.1 Issuance. If, Where upon final piping inspection,
the installation is found to comply be in accordance with the
provisions of this code, a certificate of inspection shall be permitted to be issued by the Authority Having Jurisdiction.
12054.2 Gas Supplier. A copy of the certificate of such
final piping inspection shall be issued to the serving gas supplier supplying gas to the premises.
12054.3 Unlawful. It shall be unlawful for any a serving
gas supplier, or person furnishing gas, to turn on or cause to
be turned on, any a fuel gas or any a gas meter or meters, until
such certificate of final inspection, as herein provided, has
been issued.
12065.0 Authority to Render Gas Service.
12065.1 Authorized Personnel. It shall be unlawful for
any a person, firm, or corporation, excepting an authorized
agent or employee of a person, firm, or corporation engaged
in the business of furnishing or supplying gas and whose service pipes supply or connect with the particular premises, to
turn on or reconnect gas service in or on any a premises where
and when gas service is, at the time, not being rendered.
12065.2 Outlets. It shall be unlawful to turn on or connect
gas in or on any a premises unless all outlets are properly and
securely connected to gas appliances or capped or plugged
with screw joint fittings.
12076.0 Authority to Disconnect.
12076.1 Disconnection. The Authority Having Jurisdiction or the serving gas supplier is hereby authorized to disconnect any gas piping or appliance or both that shall be
found not to conform to comply the requirements of this code
or that are found defective and in such condition as to endanger life or property.
12076.2 Notice. Where such disconnection has been made,
a notice shall be attached to such gas piping or appliance or
both that shall state the same has been disconnected, together
with the reasons thereof.
12076.3 Capped Outlets. It shall be unlawful to remove
or disconnect any gas piping or gas appliance without capping or plugging with a screw joint fitting, the outlet from
which said pipe or appliance was removed. Outlets to which
gas appliances are not connected shall be left capped, gastight on any a piping system that has been installed, altered,
or repaired.
Exception: When Where an approved listed quick- disconnect device is used.
UNIFORM PLUMBING CODE
FUEL PIPING
12087.0 Temporary Use of Gas.
1207.1 General. Where temporary use of gas is desired and
the Authority Having Jurisdiction deems the use necessary, a
permit shall be permitted to be issued for such use for a period of time not to exceed that designated by the Authority
Having Jurisdiction, provided that such gas-piping system
otherwise conforms to is in accordance with the requirements
of this code regarding material, sizing, and safety.
12098.0 Gas-Piping System Design, Materials, and
Components.
12098.1 Piping Plan.
12098.1.1 Installation of Piping System. Where
required by the Authority Having Jurisdiction, a piping
sketch or plan shall be prepared before proceeding with
the installation. This plan shall show the proposed location of piping, the size of different branches, the various
load demands, and the location of the point of delivery.
[NFPA 54:5.1.1]
12098.1.2 Addition to Existing System. When
Where an additional gas utilization appliance is being connected to a gas-piping system, the existing piping shall be
checked to determine whether it has adequate capacity (see
Section 1209.4.3). If Where inadequate, the existing system shall be enlarged as required, or separate gas piping of
adequate capacity shall be provided. [NFPA 54:5.1.2]
12098.2 Provision for Location of Point of Delivery.
The location of the point of delivery shall be acceptable to
the serving gas supplier. [NFPA 54:5.2]
12098.3 Interconnections Between Gas-Piping Systems. [NFPA 54:5.3]
12098.3.1 Interconnections Supplying Separate
Users. Where two (2) or more meters, or two (2) or more
service regulators where meters are not provided, are located on the same premises and supply separate users, the
gas-piping systems shall not be interconnected on the outlet side of the meters or service regulators. [NFPA 54:5.3.1]
12098.3.2 Interconnections for Standby Fuels.
Where a supplementary gas for standby use is connected
downstream from a meter or a service regulator where a
meter is not provided, a device to prevent backflow shall
be installed. A three-way valve installed to admit the
standby supply and, at the same time, shut off the regular supply, shall be permitted to be used for this purpose.
[NFPA 54:5.3.2]
12098.4 Sizing of Gas-Piping Systems. [NFPA 54:5.4]
12098.4.1 General Considerations. Gas-piping systems shall be of such size and so installed as to provide
a supply of gas sufficient to meet the maximum demand
and supply gas to each appliance inlet at not less than the
minimum supply pressure required by the appliance.
[NFPA 54-09:5.4.1]
12098.4.2 Maximum Gas Demand. The volume volumetric flow rate of gas to be provided (in cubic feet per
hour) shall be determined directly from calculated using
the manufacturer's input ratings of the gas utilization appliance served. Where the input rating is not indicated,
UNIFORM PLUMBING CODE
the gas supplier, appliance manufacturer, or a qualified
agency shall be contacted or the rating from Table 12-1
1208.4.2 shall be used for estimating the volume volumetric flow rate of gas to be supplied. The total connected hourly load shall be used as the basis for piping
sizing, assuming the appliance is operating at full capacity simultaneously. [NFPA 54-12:5.4.2]
Exception: Sizing shall be permitted to be based upon
established load diversity factors. [NFPA 54:5.4.2.2]
TABLE 12-1 1208.4.2
APPROXIMATE GAS INPUT FOR
TYPICAL APPLIANCES
[NFPA 54: TABLE 5.4.2.1]
APPLIANCE
Space Heating Units
Warm air furnace
Single family
Multifamily, per unit
Hydronic boiler
Single family
Multifamily, per unit
Space-and Water-Heating Units
Hydronic boiler
Single family
Multifamily, per unit
Water-Heating Appliances
Water heater, automatic storage
30 to 40 gal. tank
Water heater, automatic storage
50 gal. tank
Water heater, automatic instantaneous
INPUT Btu/h.
(Approx.)
100,000
60,000
100,000
60,000
120,000
75,000
35,000
50,000
Capacity at 2 gal./minute
142,800
Capacity at 6 gal./minute
428,400
Capacity at 4 gal./minute
Water heater, domestic, circulating or
side-arm
Cooking Appliances
Range, freestanding, domestic
Built-in oven or broiler unit, domestic
Built-in top unit, domestic
Other Appliances
Refrigerator
285,000
35,000
65,000
25,000
40,000
3,000
Clothes dryer, Type 1 (domestic)
35,000
Gas log
80,000
Gas fireplace direct vent
Barbecue
Gaslight
40,000
40,000
2,500
For SI units: 1 Btu 1000 British thermal units per hour = 0.293 kW
173
FUEL PIPING
12098.4.3 Sizing Methods. Gas piping shall be sized
in accordance with one of the following :
(1) Pipe sizing tables or sizing equations in this chapter.
(2) Other approved engineering methods acceptable to
the Authority Having Jurisdiction.
(3) Sizing tables included in a listed piping system manufacturer's installation instructions. [NFPA 54:5.4.3]
12098.4.4 Allowable Pressure Drop. The design
pressure loss in any a piping system under maximum
probable flow conditions, from the point of delivery to
the inlet connection of the appliance, shall be such that
the supply pressure at the appliance exceeds is greater
than or is equal to the minimum pressure required by the
appliance. [NFPA 54-09:5.4.4]
12098.5 Acceptable Piping Materials and Joining
Methods.
12098.5.1 General.
12098.5.1.1 Acceptable Materials. Materials
used for piping systems shall comply with the requirements of this chapter or shall be acceptable to
the Authority Having Jurisdiction. [NFPA
54:5.6.1.1]
12098.5.1.2 Used Materials. Pipe, fittings,
valves, or other materials shall not be used again unless they are free of foreign materials and have been
ascertained to be adequate approved for the service
intended. [NFPA 54:5.6.1.2]
12098.5.1.3 Other Materials. Material not covered by the standards specifications listed herein
shall be investigated and tested to determine that it
is safe and suitable for the proposed service and, in
addition, shall be recommended for that service by
the manufacturer and shall be acceptable to the Authority Having Jurisdiction. [NFPA 54:5.6.1.3]
12098.5.2 Metallic Pipe.
12098.5.2.1 Cast-Iron. Cast-iron pipe shall not be
used. [NFPA 54:5.6.2.1]
12098.5.2.2 Steel and Wrought-Iron. Steel and
wrought-iron pipe shall be not less than standard
weight (Schedule 40) and shall comply with one of
the following standards
(1) ASME B36.10, Welded and Seamless WroughtSteel Pipe.
(2) ASTM A 53, Standard Specification for Pipe,
Steel, Black and Hot-Dipped, Zinc-Coated
Welded and Seamless.
(3) ASTM A 106, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature
Service [NFPA 54:5.6.2.2]:.
12098.5.2.3 Copper and Brass. Copper and
brass pipe shall not be used if the gas contains more
than an average of 0.3 grains of hydrogen sulfide per
one-hundred (100) standard cubic feet (scf) of gas
(0.7 mg/100 L). [NFPA 54:5.6.2.3]
174
Threaded copper, brass, or aluminum alloy pipe
shall not be used with gases corrosive to such material. [NFPA 54:5.6.2.4]
12098.5.2.4 Aluminum Alloy. Aluminum alloy
pipe shall comply with ASTM B 241, Standard
Specification for Aluminum-Alloy Seamless Pipe
and Seamless Extruded Tube (except that the use of
alloy 5456 is prohibited) and shall be marked at each
end of each length indicating compliance. Aluminum alloy pipe shall be coated to protect against
external corrosion where it is in contact with masonry, plaster, insulation or is subject to repeated
wettings by such liquids as water, detergents, or
sewage. [NFPA 54:5.6.2.5] Aluminum alloy pipe
shall not be used in exterior locations or underground. [NFPA 54:5.6.2.6]
12098.5.3 Metallic Tubing. Seamless copper, aluminum alloy, or steel tubing shall not be used with gases
corrosive to such material. [NFPA 54:5.6.3]
12098.5.3.1 Steel. Steel tubing shall comply with
ASTM A 254, Standard Specification for Copper
Brazed Steel Tubing. [NFPA 54-09:5.6.3.1]
12098.5.3.2 Copper and Brass. Copper and
brass tubing shall not be used if where the gas contains more than an average of 0.3 grains of hydrogen
sulfide per one-hundred (100) scf of gas (0.7 mg/100
L). Copper tubing shall comply with standard Type
K or L of ASTM B 88, Standard Specification for
Seamless Copper Water Tube, or ASTM B 280,
Specification for Seamless Copper Tube for AirConditioning and Refrigeration Field Service.
[NFPA 54:5.6.3.2]
12098.5.3.3 Aluminum Alloy. Aluminum alloy
tubing shall comply with ASTM B 210, Standard
Specification for Aluminum-Alloy Drawn Seamless
Tubes, or ASTM B 241, Standard Specification for
Aluminum Alloy Seamless Pipe and Seamless Extruded Tube. Aluminum alloy tubing shall be coated to
protect against external corrosion where it is in contact
with masonry, plaster, insulation or is subject to repeated wettings by liquids such as water, detergent, or
sewage. Aluminum alloy tubing shall not be used in
exterior locations or underground. [NFPA 54:5.6.3.3]
12098.5.3.4 Corrugated Stainless Steel. Corrugated stainless steel tubing shall be tested and
listed in compliance accordance with the construction, installation, and performance requirements of
CSA LC-1, Standard for Fuel Gas Piping Systems
Using Corrugated Stainless Steel Tubing. [NFPA
54:5.6.3.4]
12098.5.4 Plastic Pipe, Tubing, and Fittings. Plastic pipe, tubing, and fittings used to supply fuel gas shall
conform be in accordance with ASTM D 2513, Standard
Specification for Thermoplastic Gas Pressure Pipe, Tubing, and Fittings. Pipe to be used shall be marked "gas"
and "ASTM D 2513.” [NFPA 54:5.6.4.1]
Anodeless risers shall comply with the following
sections. [NFPA 54:5.6.4.3]:
UNIFORM PLUMBING CODE
FUEL PIPING
12098.5.4.1 Regulator Vent Piping. Plastic
pipe, tubing, and fittings used to connect regulator
vents to remote vent terminations shall be PVC conforming to in accordance with ANSI/UL 651, Schedule 40 and 80 Rigid PVC Conduit and Fittings. PVC
vent piping shall not be installed indoors. [NFPA 541209:5.6.4.2]
12098.5.4.2 Factory-Assembled Anodeless
Risers. Factory-assembled anodeless risers shall be
recommended by the manufacturer for the gas used
and shall be leak-tested by the manufacturer in accordance with written procedures. [NFPA
54:5.6.4.3(1)]
12098.5.4.3 Service Head Adapters and
Field-Assembled Anodeless Risers. Service
head adapters and field-assembled anodeless risers
incorporating service head adapters shall be recommended by the manufacturer for the gas used by the
manufacturer and shall be design-certified to meet
be in accordance with the requirements of Category
I of ASTM D 2513, Standard Specification for Thermostatic Gas Pressure Pipe, Tubing, and Fittings and
the code of Federal Regulations, Title 49, Part
192.281(e). The manufacturer shall provide the user
with qualified installation instructions. as prescribed
by the code of Federal Regulations, Title 49, Part
192.283(b). [NFPA 54:5.6.4.3(2)]
12098.5.4.4 Undiluted Liquefied Petroleum
Gas Piping. The use of plastic pipe, tubing, and fittings in undiluted liquefied petroleum gas-piping systems shall be in accordance comply with NFPA 58,
Liquefied Petroleum Gas Code. [NFPA 54:5.6.4.3(3)]
12098.5.5 Workmanship and Defects. Gas pipe or
tubing and fittings shall be clear and free from cutting
burrs and defects in structure or threading, and shall be
thoroughly brushed and chip and scale blown. Defects in
pipe, tubing, and fittings shall not be repaired. Defective
pipe, tubing, and fittings shall be replaced. [NFPA
54:5.6.5]
12098.5.6 Protective Coating. Where in contact with
material or atmosphere exerting a corrosive action,
metallic piping and fittings coated with a corrosion-resistant material shall be used. External or internal coatings or linings used on piping or components shall not
be considered as adding strength. [NFPA 54:5.6.6]
12098.5.7 Metallic Pipe Threads.
1208.5.7.1 (A) Specifications for Pipe
Threads. Metallic pipe and fitting threads shall be
taper pipe threads and shall comply with ASME
B1.20.1, Standard for Pipe Threads, General Purpose (Inch). [NFPA 54:5.6.7.1]
1208.5.7.2 (B) Damaged Threads. Pipe with
threads that are stripped, chipped, corroded, or otherwise damaged shall not be used. Where a weld
opens during the operation of cutting or threading,
that portion of the pipe shall not be used. [NFPA
54:5.6.7.2]
UNIFORM PLUMBING CODE
1208.5.7.3 (C) Number of Threads. Field
threading of metallic pipe shall be in accordance
comply with Table 12-2 1208.5.7.3. [NFPA
54:5.6.7.3]
TABLE 12-2 1208.5.7.3
SPECIFICATIONS FOR THREADING METALLIC PIPE
[NFPA 54: TABLE 5.6.7.3]
NOMINAL IRON APPROXIMATE LENGTH OF
APPROXIMATE NO. OF
PIPE SIZE
THREADED PORTION
THREADS TO BE CUT
(inches)
(inches)
⁄
⁄
1
11⁄4
11⁄2
2
21⁄2
3
4
12
34
For SI units, 1 inch = 25.4 mm
⁄
⁄
7⁄8
1
1
1
11⁄2
11⁄2
15⁄8
34
34
10
10
10
11
11
11
12
12
13
1208.5.7.4 (D) Thread Joint Compounds.
Thread (joint) compounds (pipe dope) shall be resistant to the action of liquefied petroleum gas or to
any other chemical constituents of the gases to be
conducted through the piping. [NFPA 54-12:5.6.7.4]
12098.5.8 Metallic Piping Joints and Fittings. The
type of piping joint used shall be suitable approved for
the pressure-temperature conditions and shall be selected
giving consideration to joint tightness and mechanical
strength under the service conditions. The joint shall be
able to sustain the maximum end force due to the internal pressure and any additional forces due to temperature expansion or contraction, vibration, fatigue, or to the
weight of the pipe and its contents. [NFPA 54:5.6.8]
12098.5.8.1 Pipe Joints. Pipe joints shall be
threaded, flanged, brazed, or welded. Where nonferrous pipe is brazed, the brazing materials shall
have a melting point in excess of 1,000°F (538°C).
Brazing alloys shall not contain more than 0.05 percent phosphorus. [NFPA 54:5.6.8.1]
12098.5.8.2 Tubing Joints. Tubing joints shall
either be made with approved gas tubing fittings, be
brazed with a material having a melting point in excess of 1,000°F (538°C), or made by press-connect
fittings complying in accordance with CSA ANSI
LC-4. Brazing alloys shall not contain more than
0.05 percent phosphorus. [NFPA 54:5.6.8.2]
12098.5.8.3 Flared Joints. Flared joints shall be
used only in systems constructed from nonferrous
pipe and tubing where experience or tests have
demonstrated that the joint is suitable approved for
the conditions and where provisions are made in the
design to prevent separation of the joints. [NFPA
54:5.6.8.3]
175
FUEL PIPING
12098.5.8.4 Metallic Fittings (Including
Valves, Strainers, Filters). Metallic fittings shall
comply with the following:
(1) Threaded fittings in sizes exceeding four (4)
inches (100 mm) shall not be used unless acceptable to the Authority Having Jurisdiction.
(2) Fittings used with steel or wrought-iron pipe
shall be steel, brass, bronze, malleable iron, or
cast-iron.
(3) Fittings used with copper or brass pipe shall be
copper, brass, or bronze.
(4) Fittings used with aluminum alloy pipe shall be
of aluminum alloy.
(5) Cast-Iron Fittings.
(a) Flanges shall be permitted.
(b) Bushings shall not be used.
(c) Fittings shall not be used in systems containing flammable gas-air mixtures.
(d) Fittings in sizes four (4) inches (100 mm)
and larger shall not be used indoors unless
approved by the Authority Having Jurisdiction.
(e) Fittings in sizes six (6) inches (150 mm)
and larger shall not be used unless approved by the Authority Having Jurisdiction.
(6) Aluminum Alloy Fittings. Threads shall not
form the joint seal.
(7) Zinc-Aluminum Alloy Fittings. Fittings shall
not be used in systems containing flammable
gas-air mixtures.
(8) Special Fittings. Fittings such as couplings; proprietary-type joints; saddle tees; gland-type
compression fittings; and flared, flareless, or
compression-type tubing fittings shall be:
(1a) uUsed within the fitting manufacturers'
pressure-temperature recommendations;.
(2b) uUsed within the service conditions anticipated with respect to vibration, fatigue,
thermal expansion, or contraction;.
(3c) iInstalled or braced to prevent separation
of the joint by gas pressure or external
physical damage;. and
(4d) aAcceptable to the Authority Having Jurisdiction. [NFPA 54:5.6.8.4]
12098.5.9 Plastic Piping, Joints, and Fittings.
Plastic pipe, tubing, and fittings shall be joined in accordance with the manufacturers' instructions. The following sections shall be observed when where making such
joints. [NFPA 54:5.6.9]:
1208.5.9.1 Joint Design (A) The joint shall be
designed and installed so that the longitudinal pullout resistance of the joint shall be equal to the tensile strength of the plastic piping material. [NFPA
54:5.6.9(1)]
176
1208.5.9.2 Heat-Fusion Joint (B) Heat-fusion
joints shall be made in accordance with AWS B2.4
Specification for Welding Procedure and Performance Qualification for Thermoplastics. Joints shall
be made with the joining method recommended by
the pipe manufacturer. Heat-fusion fittings shall be
marked "ASTM D 2513." [NFPA 54:5.6.9(2)]
1208.5.9.3 Compression Type Mechanical
Joints. (C) Where compression-type mechanical
joints are used, the gasket material in the fitting shall
be compatible with the plastic piping and with the
gas distributed by the system. An internal tubular
rigid stiffener shall be used in conjunction with the
fitting. The stiffener shall be flush with the end of
the pipe or tubing, shall extend not less than the outside end of the pipe or tubing and shall extend not
less than to the outside end of the compression fitting when where installed. The stiffener shall be free
of rough or sharp edges and shall not be a forced fit
in the plastic. Split tubular stiffeners shall not be
used. [NFPA 54:5.6.9(3)]
1208.5.9.4 (D) Liquefied Petroleum Gas Piping Systems. Plastic piping joints and fittings for
use in liquefied petroleum gas-piping systems shall
be in accordance with NFPA 58, Liquefied Petroleum Gas Code. [NFPA 54:5.6.9(4)]
12098.5.10 Flanges. Flanges shall comply with
ASME B16.1, Standard for Cast-Iron Pipe Flanges and
Flanged Fittings; ASME B16.20, Standard for RingJoint Gaskets and Grooves for Steel Pipe Flanges; or
MSS SP-6, Standard Finishes for Contact Faces of Pipe
Flanges and Connecting-End Flanges of Valves and Fittings. The pressure-temperature ratings shall equal or exceed that required by the application. [NFPA 54:5.6.10]
1208.5.10.1 (A) Flange Facings. Standard facings shall be permitted for use under this code.
Where one-hundred and fifty (150) psi (1,090 1034
kPa) steel flanges are bolted to Class 125 cast-iron
flanges, the raised face on the steel flange shall be
removed. [NFPA 54:5.6.10.1]
1208.5.10.2 (B) Lapped Flanges. Lapped flanges
shall be used only above ground or in exposed locations accessible for inspection. [NFPA 54:5.6.10.2]
12098.5.11 Flange Gaskets. The material for gaskets
shall be capable of withstanding the design temperature
and pressure of the piping system and the chemical constituents of the gas being conducted without change to
its chemical and physical properties. The effects of fire
exposure to the joint shall be considered in choosing the
material. [NFPA 54:5.6.11] Flange gaskets shall comply
with the following requirements:
(1) Acceptable materials include the following [NFPA
54-12:5.6.11.1]:
(a) Metal or metal-jacketed asbestos (plain or corrugated).
(b) Asbestos Composition.
(c) Aluminum "O" rings and spiral-wound metal
gaskets.
UNIFORM PLUMBING CODE
FUEL PIPING
(2) When Where a flanged joint is opened, the gasket
shall be replaced. [NFPA 54:5.6.11.2]
(3) Full-face gaskets shall be used with all bronze and
cast-iron flanges. [NFPA 54:5.6.11.3]
12098.6 Gas Meters.
12098.6.1 Capacity. Gas meters shall be selected for
the maximum expected pressure and permissible pressure drop. [NFPA 54:5.7.1]
12098.6.2 Location.
1208.6.2.1 Ventilated Spaces. (A) Gas meters
shall be located in ventilated spaces readily accessible for examination, reading, replacement, or necessary maintenance. [NFPA 54:5.7.2.1]
1208.6.2.2 Subject to Damage. (B) Gas meters
shall not be placed where they will be subjected to
damage, such as adjacent to a driveway; under a fire
escape; in public passages, halls, or coal bins; or
where they will be subject to excessive corrosion or
vibration. [NFPA 54:5.7.2.2]
1208.6.2.3 Extreme Temperatures. (C) Gas
meters shall not be located where they will be subjected to extreme temperatures or sudden extreme
changes in temperature. Meters shall not be located
in areas where they are subjected to temperatures beyond those recommended by the manufacturer.
[NFPA 54:5.7.2.4]
12098.6.3 Supports. Gas meters shall be supported or
connected to rigid piping so as not to exert a strain on the
meters. Where flexible connectors are used to connect a
gas meter to downstream piping at mobile homes in mobile home parks, the meter shall be supported by a post or
bracket placed in a firm footing or by other means providing equivalent support. [NFPA 54:5.7.3]
12098.6.4 Meter Protection. Meters shall be protected
against overpressure, back-pressure, and vacuum where
such conditions are anticipated. [NFPA 54-12:5.7.4]
12098.6.5 Identification. Gas piping at multiple meter
installations shall be marked by a metal tag or other permanent means attached by the installing agency, designating the building or the part of the building being
supplied. [NFPA 54:5.7.5]
12098.7 Gas Pressure Regulators.
12098.7.1 Where Required. A line gas pressure regulator or gas appliance pressure regulator, as applicable,
shall be installed where the gas supply pressure exceeds
that at which the branch supply line or gas utilization appliance is designed to operate or varies beyond design
pressure limits. [NFPA 54-12:5.8.1]
1208.7.1.1 Where the gas supply pressure in piping
systems located indoors exceeds 2 psi (14 kPa) and
line pressure regulators are installed to reduce the
supply pressure to 14 inches water column (3.5 kPa)
or less, the following shall apply:
(1) Regulators shall be provided with factory installed overpressure protection devices.
UNIFORM PLUMBING CODE
(2) Overpressure protection devices shall limit the
pressure downstream of the line pressure regulator to 2 psi (14 kPa) in the event of failure of
the line pressure regulator.
12098.7.2 Listing. The line gas pressure regulator shall
be listed in accordance with CSA Z21.80. [NFPA
54:5.8.2]
12098.7.3 Location. The gas pressure regulator shall
be accessible for servicing. [NFPA 54:5.8.3]
12098.7.4 Regulator Protection. Pressure regulators
shall be protected against physical damage. [NFPA
54:5.8.4]
12098.7.5 Venting.
1208.7.5.1 (A) Line Gas Pressure Regulators. Line gas pressure regulators shall be installed
in accordance with the following requirements:
(1) An independent vent to the outside exterior of
the building, sized in accordance with the regulator manufacturer's instructions, shall be provided where the location of a regulator is such
that a ruptured diaphragm will cause a hazard.
Where there is more than one (1) regulator is at
a location, each regulator shall have a separate
vent to the outside outdoors, or, if where approved by the Authority Having Jurisdiction,
the vent lines shall be permitted to be manifolded in accordance with accepted engineering
practices to minimize back-pressure in the event
of diaphragm failure. (See NFPA 54:5.9.7 for
information on properly locating the vent.) Materials for vent piping shall be in accordance
comply with Section 12098.5.
Exception: A regulator and vent limiting means
combination listed as complying in accordance
with CSA Z21.80, Standard for Line Pressure Regulators, shall be permitted to be used without a
vent to the outdoors.
(2) The vent shall be designed to prevent the entry
of water, insects, or other foreign materials that
could cause blockage.
(3) The regulator vent shall terminate not less than
3 feet (914 mm) from a source of ignition.
(34) At locations where regulators might be will submerged during floods, a special antiflood-type
breather vent fitting shall be installed, or the
vent line shall be extended above the height of
the expected flood waters.
(45) A regulator shall not be vented to the gas appliance flue or exhaust system. [NFPA 54:5.8.5.1]
1208.7.5.2 (B) Venting of Gas Appliance
Pressure Regulators. Venting of gas appliance
pressure regulators shall comply with the following
requirements:
(1) Gas aAppliance pressure regulators requiring
access to the atmosphere for successful operation shall be equipped with vent piping leading
177
FUEL PIPING
outdoors, or, if where the regulator vent is an
integral part of the appliance, into the combustion chamber adjacent to a continuous pilot, unless constructed or equipped with a
vent-limiting means to limit the escape of gas
from the vent opening in the event of diaphragm
failure.
(2) Vent-limiting means shall be employed on listed
gas appliance pressure regulators only.
(3) In the case of vents leading outdoors, means shall
be employed to prevent water from entering this
piping and also to prevent blockage of vents by
insects and foreign matter.
(4) Under no circumstances shall a regulator be
vented to the gas utilization appliance flue or
exhaust system.
(5) In the case of vents entering the combustion
chamber, the vent shall be located so the escaping gas will be readily ignited by the pilot and
the heat liberated thereby will not adversely affect the normal operation of the safety shutoff
system. The terminus of the vent shall be securely held in a fixed position relative to the
pilot. For manufactured gas, the need for a
flame arrester in the vent piping shall be determined.
(6) Vent lines from a gas appliance pressure regulator and bleed lines from a diaphragm-type
valve shall not be connected to a common manifold terminating in a combustion chamber. Vent
lines shall not terminate in positive-pressuretype combustion chambers. [NFPA 54:9.1.19]
1208.7.5.3 (C) Discharge of Vents. Discharge
of vents shall be in accordance with the following
requirements:
(1) The discharge stacks, vents, or outlet parts of all
pressure-relieving and pressure-limiting devices
shall be located so that gas is safely discharged
into the outside atmosphere outdoors.
(2) Discharge stacks or vents shall be designed to
prevent the entry of water, insects, or any other
foreign material that could cause blockage. The
discharge stack or vent line shall be not less than
the same size as the outlet of the pressure-relieving device. [NFPA 54:5.9.7]
12098.7.6 Bypass Piping. Valved and regulated bypasses shall be permitted to be placed around gas line
pressure regulators where continuity of service is imperative. [NFPA 54:5.8.6]
12098.7.7 Identification. Line pressure regulators at
multiple regulator installations shall be marked by a
metal tag or other permanent means designating the
building or the part of the building being supplied.
[NFPA 54:5.8.7]
12098.8 Back-Pressure Protection.
12098.8.1 Where to Install. Protective devices shall
be installed as close to the utilization appliance as prac178
tical, where the design of utilization appliances connected are such that air, oxygen, or standby gases could
be are capable of being forced into the gas supply system. [NFPA 54:5.10.1.1] Gas and air combustion mixers
incorporating double diaphragm "zero" or "atmosphere"
governors or regulators shall require no further protection
unless connected directly to compressed air or oxygen at
pressures of five (5) psi (34 kPa) or more. [NFPA
54:5.10.1.2]
12098.8.2 Protective Devices. Protective devices
shall include but not be limited to the following:
(1) Check valves.
(2) Three-way valves (of the type that completely closes
one side before starting to open the other side).
(3) Reverse flow indicators controlling positive shutoff
valves.
(4) Normally closed air-actuated positive shutoff pressure regulators. [NFPA 54:5.10.2]
12098.9 Low-Pressure Protection. A protective device
shall be installed between the meter and the gas utilization
appliance or equipment if where the operation of the appliance or equipment (i.e., gas compressors) is such that it could
produce is capable of producing a vacuum or a dangerous reduction in gas pressure at the meter. Such protective devices
include, but are not limited to, mechanical, diaphragm-operated, or electrically operated low-pressure shutoff valves.
[NFPA 54-12:5.11]
12098.10 Shutoff Valves. Shutoff valves shall be approved
and shall be selected giving consideration to pressure drop,
service involved, emergency use, and reliability of operation.
Shutoff valves of size one (1) inch (25 mm) National Pipe
Thread and smaller shall be listed. [NFPA 54:5.12]
12098.11 Expansion and Flexibility.
12098.11.1 Design. Piping systems shall be designed
to have sufficient flexibility to prevent failure from thermal expansion or contraction. from causing excessive
stresses in the piping material, excessive bending or
loads at joints, or undesirable forces or moments at points
of connections to equipment and at anchorage or guide
points. Formal calculations or model tests shall be required only where reasonable doubt exists as to the adequate flexibility of the system. [NFPA 54-12:5.134.1]
Flexibility shall be provided by the use of bends,
loops, offsets, or couplings of the slip type. Provision
shall be made to absorb thermal changes by the use of
expansion joints of the bellows type, or by the use of
"ball" or "swivel" joints. Expansion joints of the slip type
shall not be used inside buildings or for thermal expansion. Where expansion joints are used, anchors or ties of
sufficient strength and rigidity shall be installed to provide
for end forces due to fluid pressure and other causes.
[NFPA 54:5.13.1.1]
Pipe alignment guides shall be used with expansion
joints according to the recommended practice of the joint
manufacturer. [NFPA 54:5.13.1.2]
UNIFORM PLUMBING CODE
FUEL PIPING
12098.11.2 Special Local Conditions. Where local
conditions include earthquake, tornado, unstable ground,
or flood hazards, special consideration shall be given to
increased strength and flexibility of piping supports and
connections. [NFPA 54:5.13.2]
12109.0 Excess Flow Valve.
1209.1 General. Where automatic excess flow gas valves
are installed, they shall be listed, sized, and installed in accordance with the manufacturer’s instructions. [NFPA 5409:5.13]
12110.0 Gas Piping Installation.
12110.1 Piping Underground.
12110.1.1 Clearances. Underground gas piping shall
be installed with sufficient approved clearance from any
other underground structures to avoid contact therewith,
to allow maintenance, and to protect against damage
from proximity to other structures. In addition, underground plastic piping shall be installed with sufficient
approved clearance or shall be insulated from any a
sources of heat so as to prevent the heat from impairing
the serviceability of the pipe. [NFPA 54:7.1.1]
12110.1.2 Protection Against Damage.
1210.1.2.1 (A) Cover Requirements. Underground piping systems shall be installed with a minimum cover not less than of eighteen (18) inches (460
457 mm) of cover. Where external damage to the pipe
is not likely to result, the cover shall be a minimum
not less than of twelve (12) inches (3005 mm).
Where a minimum of cover not less than twelve (12)
inches (3005 mm) of cover cannot be provided, the
pipe shall be installed in conduit or bridged
(shielded). [NFPA 54:7.1.2.1]
1210.1.2.2 (B) Trenches. The trench shall be
graded so that the pipe has a firm, substantially continuous bearing on the bottom of the trench. [NFPA
54:7.1.2.2]
1210.1.2.3 (C) Backfilling. Where flooding of the
trench is done to consolidate the backfill, care shall
be exercised to see that the pipe is not floated from its
firm bearing on the trench bottom. [NFPA 54:7.1.2.3]
12110.1.3 Protection Against Corrosion. Gas piping in contact with earth or other material that could corrode is capable of corroding the piping shall be protected
against corrosion in an approved manner. When Where
dissimilar metals are joined underground, an insulating
coupling or fitting shall be used. Piping shall not be laid
in contact with cinders. Uncoated threaded or socketwelded joints shall not be used in piping in contact with
soil or where internal or external crevice corrosion is
known to occur. [NFPA 54:7.1.3]
12110.1.4 Protection Against Freezing. Where the
formation of hydrates or ice is known to occur, piping
shall be protected against freezing. [NFPA 54:7.1.4]
UNIFORM PLUMBING CODE
12110.1.5 Piping Through Foundation Wall. Underground piping, where installed through the outer foundation
or basement wall of a building, shall be encased in a protective sleeve or protected by an approved device or
method. The space between the gas piping and the building
or sleeve and between the sleeve and the wall shall be sealed
to prevent entry of gas and water. [NFPA 54-12:7.1.5]
12110.1.6 Piping Underground Beneath Buildings.
Where the installation of gas piping is installed underground beneath buildings is unavoidable, the piping shall
be either:
(1) eEncased in an approved conduit designed to withstand the superimposed loads and installed in accordance with Section 1210.1.6.1 or Section 1210.1.6.2,
or. [NFPA 54:7.1.6]
(2) A piping or encasement system listed for installation
beneath buildings.
12110.1.6.1 Conduit with One End Terminating Outdoors. The conduit shall extend into a normally usable and accessible portion of the building
and, at the point where the conduit terminates in the
building, the space between the conduit and the gas
piping shall be sealed to prevent the possible entrance
of any a gas leakage. Where the end sealing is of a type
that will retain the full pressure of the pipe, the conduit
shall be designed for the same pressure as the pipe.
The conduit shall extend not less than (4) inches (1002
mm) outside the building, be vented outdoors above
finished ground level grade to the outside, and be installed so as to prevent the entrance of water and insects. [NFPA 54:7.1.6.1]
12110.1.6.2 Conduit with Both Ends Terminating Indoors. Where the conduit originates and
terminates within the same building, the conduit
shall originate and terminate in an accessible portion of the building and shall not be sealed. [NFPA
54:7.1.6.2]
12110.1.7 Plastic Pipe.
1210.1.7.1 (A) Connection of Plastic Piping.
Plastic pipe shall be installed outside, underground
only. [NFPA 54:7.1.7.1]
Exceptions:
(1) Exception No. 1: Plastic pipe shall be permitted to terminate above ground where an anodeless riser is used.
(2) Exception No. 2: Plastic pipe shall be permitted
to terminate with a wall head adapter above
ground in buildings, including basements, where
the plastic pipe is inserted in a piping material
permitted for use in buildings.
1210.1.7.2 (B) Connections Between Metallic
and Plastic Piping. Connections made between
metallic and plastic piping shall be made only with
fittings conforming to that are in accordance with
one of the following:
179
FUEL PIPING
(1) ASTM D2513, Standard Specification for Thermoplastic Gas Pressure Pipe, Tubing, and Fittings, Category I transition fittings.
(2) ASTM F1973, Standard Specification for Factory Assembled Anodeless Risers and Transition
Fittings in Polyethylene (PE) and Polyamide 11
(PA11) Fuel Gas Distribution Systems.
(3) ASTM F2509, Standard Specification for FieldAssembled Anodeless Riser Kits for Use on Outside Diameter Controlled Polyethylene Gas
Distribution Pipe and Tubing. [NFPA 5409:7.1.7.2]
1210.1.7.3 (C) Tracer Wire. An electrically continuous corrosion-resistant tracer wire (minimum
not less than AWG 14) or tape shall be buried with
the plastic pipe to facilitate locating. One (1) end
shall be brought above ground at a building wall or
riser. [NFPA 54:7.1.7.3]
12110.2 Installation of Piping.
12110.2.1 Protection. Piping installed above ground
shall be securely supported and located where it will be
protected from physical damage (also see 1211.1.4).
Where passing through an outside wall, the piping shall
also be protected against corrosion by coating or wrapping with an inert material approved for such applications. The piping shall be sealed around its circumference
at the point of the exterior penetration to prevent the
entry of water, insects, and rodents. Where piping is encased in a protective pipe sleeve, the annular spaces between the gas piping and the sleeve and between the
sleeve and the wall opening shall be sealed at the exterior
wall to prevent the entry of water, insects, or rodents.
[NFPA 54-12:7.2.1]
12110.2.2 Building Structure.
1210.2.2.1 Installation. (1) The installation of gas
piping shall not cause structural stresses within
building components to exceed allowable design
limits. [NFPA 54:7.2.2.1]
1210.2.2.2 Approval. (2) Approval shall be obtained before any beams or joists are cut or notched.
[NFPA 54:7.2.2.2] Permission shall be obtained
from the Authority Having Jurisdiction.
1211.2.3 Other than Dry Gas. Drips, sloping, protection from freezing, and branch pipe connections, as
provided for in Section 1211.1.4, 1211.8.1, and Section
1211.10, shall be provided when other than dry gas is
distributed and climactic conditions make such provisions necessary. [NFPA 54:7.2.3]
12110.2.43 Gas Piping to be Sloped. Piping for
other than dry gas conditions shall be sloped not less than
one-fourth (1⁄4) inch in fifteen (15) feet (8 mm in 4,572
mm) (1.4 mm/m) to prevent traps. [NFPA 54:7.2.4]
12110.2.43.1 Ceiling Locations. Gas piping
shall be permitted to be installed in accessible spaces
180
between a fixed ceiling and a dropped ceiling,
whether or not such spaces are used as a plenum.
Valves shall not be located in such spaces.
Exception: Appliance shutoff valves required by
this code shall be permitted to be installed in accessible spaces containing vented gas utilization appliances.
12110.2.54 Prohibited Locations. Gas piping inside
any a building shall not be installed in or through a circulating air duct, clothes chute, chimney or gas vent, ventilating duct, dumbwaiter, or elevator shaft, or air duct,
other than combustion air ducts. [NFPA 54:7.2.5]
Exception: This provision shall not apply to dDucts used
to provide combustion and ventilation air in accordance
with Section 5076.0 or to above-ceiling spaces as covered in Section 121110.2.4.1.
12110.2.65 Hangers, Supports, and Anchors.
1210.2.5.1 General Requirements. (A) Piping
shall be supported with metal pipe hooks, metal pipe
straps, metal bands, metal brackets, metal hangers,
or building structural components, suitable approved
for the size of piping, of adequate strength and quality; and located at intervals so as to prevent or damp
out excessive vibration. Piping shall be anchored to
prevent undue strains on connected appliances and
equipment and shall not be supported by other piping. Pipe hangers and supports shall conform to
comply with the requirements of MSS SP-58, Pipe
Hangers and Supports Materials, Design and Manufacture. [NFPA 54:7.2.6.1]
1210.2.5.2 Spacing. (B) Spacings of supports in
gas-piping installations shall not exceed as the distance shown in Table 12-3 1210.2.5.2. Spacing of
supports for CSST shall be in accordance with the
CSST manufacturer's instruction. [NFPA 54:7.2.6.2]
1210.2.5.3 Expansion and Contraction. (C)
Supports, hangers, and anchors shall be installed so
as not to interfere with the free expansion and contraction of the piping between anchors. All pParts of
the supporting equipment system shall be designed
and installed so they will are not be disengaged by
movement of the supported piping. [NFPA 54:7.2.6.3]
STEEL PIPE,
NOMINAL SIZE
OF PIPE
(inches.)
⁄
⁄ or 1
11⁄4 or larger
(horizontal)
11⁄4 or larger
(vertical)
34
12
TABLE 12-3 1210.2.5.2
SUPPORT OF PIPING
[NFPA 54: Table 7.2.6.2]
SPACING OF
SUPPORTS
(feet.)
6
8
10
every floor
level
NOMINAL SIZE OF
TUBING SMOOTHWALL
(Iinches. O.D.)
⁄
⁄ or 3⁄4
7⁄8 or 1
(horizontal)
1 or larger
(vertical)
58
12
For SI units: 1 inch = 25 mm, 1 foot. = 0.305 m 304.8 mm.
SPACING OF
SUPPORTS
(feet.)
4
6
8
every floor
level
UNIFORM PLUMBING CODE
FUEL PIPING
12110.2.76 Removal of Pipe Piping. Where piping
containing gas is to be removed, the line shall be first
disconnected from sources of gas and then thoroughly
purged with air, water, or inert gas before any cutting or
welding is done. (See Section 1214.6.) [NFPA 54:7.2.7]
12110.3 Concealed Piping in Buildings.
12110.3.1 General. Gas piping in concealed locations
shall be installed in accordance with this section. [NFPA
54:7.3.1]
12110.3.2 Connections. Where gas piping is to be
concealed, unions, tubing fittings, right and left couplings, bushings, swing joints, and compression couplings made by combinations of fittings shall not be used.
Cconnections shall be of the following type:
(1) Pipe fittings such as elbows, tees, and couplings, and
right/left nipple/couplings.
(2) Joining tubing by brazing (See Section 12098.5.8.2).
(3) Fittings listed for use in concealed spaces or that
have been demonstrated to sustain, without leakage,
any forces due to temperature expansion or contraction, vibration, or fatigue based on their geographic
location, application, or operation.
(4) Where necessary to insert fittings in gas pipe that
has been installed in a concealed location, the pipe
shall be reconnected by welding, flanges, or the use
of a ground joint union with the nut center-punched
to prevent loosening by vibration right/left nipple/coupling. [NFPA 54:7.3.2]
12110.3.3 Piping in Partitions. Concealed gas piping
shall not be located in solid partitions. [NFPA 54:7.3.3]
12110.3.4 Tubing in Partitions. This provision shall
not apply to tubing that pierces walls, floors, or partitions
or to tubing installed vertically and horizontally inside
hollow walls or partitions without protection along its
entire concealed length where both of the following requirements are met:
(1) A steel striker barrier not less than 0.0508 inches
(1.3 mm) thick, or equivalent, is installed between
the tubing, the finished wall and extends at least not
less than 4 inches (1002 mm) beyond concealed penetrations of plates, fire stops, wall studs, and so on.
(2) The tubing is installed in single runs and is not
rigidly secured. [NFPA 54:7.3.4]
12110.3.5 Piping in Floors. In industrial occupancies, gas piping in solid floors such as concrete shall be
laid in channels in the floor and covered to permit access
to the piping with minimum damage to the building.
Where piping in floor channels could be is capable of
being exposed to excessive moisture or corrosive substances, the piping shall be protected in an approved
manner. [NFPA 54:7.3.5.1]
Exception: In other than industrial occupancies and
where approved by the Authority Having Jurisdiction,
gas piping embedded in concrete floor slabs constructed
with portland cement shall be surrounded with a miniUNIFORM PLUMBING CODE
mum not less than of one and one half (11⁄2) inches (38
mm) of concrete and shall not be in physical contact with
other metallic structures such as reinforcing rods or electrically neutral conductors. Piping, fittings, and risers
shall be protected against corrosion in accordance with
Section 12098.5.6. Piping shall not be embedded in concrete slabs containing quick-set additives or cinder aggregate. [NFPA 54:7.3.5.2]
12110.4 Piping in Vertical Chases. (See Section 1202.0.)
Where gas piping exceeding five (5) psi (34 kPa) is located
within vertical chases in accordance with Section 12110.5,
the requirements of Sections 12110.5.1 through Section
12110.5.3 shall apply. [NFPA 54:7.4]
12110.5 Maximum Design Operating Pressure. The
maximum design operating pressure for piping systems located inside buildings shall not exceed five (5) psi (34 kPa)
unless one (1) or more of the following conditions are met:
(1) The piping system is welded.
(2) The piping is located in a ventilated chase or otherwise
enclosed for protection against accidental gas accumulation.
(3) The piping is located inside buildings or separate areas of
buildings used exclusively for one of the following:
(a) Industrial processing or heating.
(b) Research.
(c) Warehousing.
(d) Boiler or mechanical equipment rooms.
(4) The piping is a temporary installation for buildings under
construction.
(5) The piping serves appliances or equipment used for agricultural purposes.
(6) The piping system is an LP-Gas piping system with a design operating pressure greater than exceeding 20 psi
(138 kPa) and complies in accordance with NFPA 58
54:5.5.2. Liquefied Petroleum Gas Systems LP-Gas systems designed to operate below -5ºF (-21ºC) or with butane or a propane-butane mix shall be designed to either
accommodate liquid LP-Gas or to prevent LP-Gas vapor
from condensing back into liquid. [NFPA 54-09:5.5.1
and 5.5.2]
12110.5.1 Pressure Reduction. (See Section
1202.0.) Where pressure reduction is required in branch
connections for compliance in accordance with Section
12110.5, such reduction shall take place either inside the
chase or immediately adjacent to the outside wall of the
chase. Regulator venting and downstream overpressure
protection shall comply with Section 12098.7.5 and NFPA
Section 5.9. The regulator shall be accessible for service
and repair, and vented in accordance with one (1) of the
following:
(1) Where the fuel gas is lighter than air, regulators
equipped with a vent-limiting means shall be permitted to be vented into the chase. Regulators not
equipped with a vent-limiting means shall be per181
FUEL PIPING
mitted to be vented either directly to the outdoors or
to a point within the top one (1) foot (0.305 mm) of the
chase.
(2) Where the fuel gas is heavier than air, the regulator
vent shall be vented only directly to the outdoors.
[NFPA 54:7.4.1]
12110.5.2 Liquefied Petroleum Gas Systems. The
maximum operating pressure of LP-Gas piping systems
shall be:
(1) In accordance with Section 12110.5.1;
(2) In accordance with NFPA 58, where the pressure exceeds twenty (20) psi (138 kPa) and;
(3) Designed to either accommodate liquid LP-Gas or
prevent LP-Gas vapor from condensing back into a liquid in buildings having systems designed to operate
below -5ºF (-21ºC) or with butane or a propane–butane
mix.
12110.5.3 Construction. Chase construction shall
comply with local building codes with respect to fire resistance and protection of horizontal and vertical openings. [NFPA 54:7.4.2]
12110.5.4 Ventilation. A chase shall be ventilated to
the outdoors and only at the top. The openings shall have
a minimum free area (in square inches) equal to the product of one-half (1⁄2) of the maximum pressure in the piping (in psi) times the largest nominal diameter of that
piping (in inches), or the cross-sectional area of the
chase, whichever is smaller. Where more than one (1)
fuel gas piping system is present, the free area for each
system shall be calculated and the largest area used.
[NFPA 54:7.4.3]
12110.6 Appliance Over Pressure Protection. The
maximum operating pressure for piping systems serving appliances designed to operate at fourteen (14) inches w.c. water
column (3.5 kPa) inlet pressure or less shall be two (2) psig 14
kPa) unless an over-pressure protection device designed to
limit pressure at the appliance to two (2) psig (14 kPa) upon
failure of the line gas pressure regulator is installed.
12110.7 Gas Pipe Turns. Changes in direction of gas pipe
shall be made by the use of fittings, or factory bends, or field
bends. [NFPA 54:7.5]
12110.7.1 Metallic Pipe. Metallic pipe bends shall
comply with the following:
(1) Bends shall be made only with bending equipment
and procedures intended for that purpose.
(2) Bends shall be smooth and free from buckling,
cracks, or other evidence of mechanical damage.
(3) The longitudinal weld of the pipe shall be near the
neutral axis of the bend.
(4) The pipe shall not be bent through an arc of more
than 90 degrees (1.57 rad).
(5) The inside radius of a bend shall be not less than six
(6) times the outside diameter of the pipe. [NFPA
54:7.5.1]
182
12110.7.2 Plastic Pipe. Plastic pipe bends shall comply with the following:
(1) The pipe shall not be damaged and the internal diameter of the pipe shall not be effectively reduced.
(2) Joints shall not be located in pipe bends.
(3) The radius of the inner curve of such bends shall be
not less than twenty-five (25) times the inside diameter of the pipe.
(4) Where the piping manufacturer specifies the use of
special bending equipment or procedures, such
equipment or procedures shall be used. [NFPA
54:7.5.2]
12110.7.3 Elbows. Factory-made welding elbows or
transverse segments cut therefrom shall have an arc
length measured along the crotch of at least not less than
one (1) inch (25.4 mm) for pipe sizes two (2) inches (50
mm) and larger. [NFPA 54:7.5.3]
12110.8 Drips and Sediment Traps.
12110.8.1 Provide Drips Where Necessary. For
other than dry gas conditions, a drip shall be provided at
any a point in the line of pipe where condensate is capable of collecting could collect. Where required by the Authority Having Jurisdiction or the serving gas supplier, a
drip shall also be provided at the outlet of the meter. This
drip shall be so installed as to constitute a trap wherein an
accumulation of condensate will shut off the flow of gas
before it will run back into the meter. [NFPA 54:7.6.1]
12110.8.2 Location of Drips. Drips shall be installed
only in such locations that they will be readily accessible
to permit cleaning or emptying. A drip shall not be located where the condensate is likely to freeze. [NFPA
54:7.6.2]
12110.8.3 Sediment Traps. (See Section 1212.7.)
The installation of sediment traps shall comply with Section 1211.7.
12110.9 Outlets.
12110.9.1 Location and Installation. Outlets shall
be located and installed in accordance with the following requirements:
(1) The outlet fittings or piping shall be securely fastened in place. [NFPA 54:7.7.1.1]
(2) Outlets shall not be located behind doors. [NFPA
54:7.7.1.2]
(3) Outlets shall be located far enough from floors,
walls, patios, slabs, and ceilings to permit the use of
wrenches without straining, bending, or damaging
the piping. [NFPA 54:7.7.1.3]
(4) The unthreaded portion of gas piping outlets shall
extend not less than one (1) inch (25.4 mm) through
finished ceilings or indoor or outdoor walls. [NFPA
54:7.7.1.4]
(5) The unthreaded portion of gas piping outlets shall
extend not less than two (2) inches (501 mm) above
the surface of floors or outdoor patios or slabs.
[NFPA 54:7.7.1.5]
UNIFORM PLUMBING CODE
FUEL PIPING
(6) The provisions of Sections 12110.79.1(4) and Section 1210.9.1(5) shall not apply to listed quick-disconnect devices of the flush-mounted type or listed
gas convenience outlets. Such devices shall be installed in accordance with the manufacturer’s installation instructions. [NFPA 54:7.7.1.6]
12110.9.2 Cap Outlets.
1210.9.2.1 Gas-Tight. (A) Each outlet, including
a valve, shall be closed gas-tight with a threaded
plug or cap immediately after installation and shall
be left closed until the gas utilization appliance is
connected thereto. When Where an appliance is disconnected from an outlet and the outlet is not to be
used again immediately, it shall be closed gas-tight.
[NFPA 54:7.7.2.1]
Exceptions:
(1) Exception No. 1: Laboratory equipment installed in accordance with Section 12121.2(A1)
shall be permitted.
(2) Exception No. 2: The use of a listed quick-disconnect device with integral shutoff or listed
gas convenience outlet shall be permitted.
1210.9.2.2 Appliance Shutoff Valves (B) Appliance shutoff valves installed in fireplaces shall be
removed and the piping capped gas-tight where the
fireplace is used for solid-fuel burning. [NFPA
54:7.7.2.2]
12110.10 Branch Pipe Connection. When Where a
branch outlet is placed on a main supply line before it is
known what size pipe will be connected to it, the outlet shall
be of the same size as the line that supplies it. [NFPA 54:7.8]
12110.11 Manual Gas Shutoff Valves. (Also see Section 1212.5)
12110.11.1 Valves at Regulators. An accessible gas
shutoff valve shall be provided upstream of each gas
pressure regulator. Where two (2) gas pressure regulators are installed in series in a single gas line, a manual
valve shall not be required at the second regulator. [NFPA
54:7.9.1]
12110.11.2 Valves Controlling Multiple Systems.
1210.11.2.1 (A) Accessibility of Gas Valves.
Main gas shutoff valves controlling several gas piping systems shall be readily accessible for operation
and installed so as to be protected from physical
damage. They shall be marked with a metal tag or
other permanent means attached by the installing
agency so that the gas piping systems supplied
through them can be are readily identified. [NFPA
54:7.9.2.1]
1210.11.2.2 (B) Shutoff Valves for Multiple
House Lines. In multiple-tenant buildings supplied through a master meter, or through one (1)
service regulator where a meter is not provided, or
where meters or service regulators are not readily
UNIFORM PLUMBING CODE
accessible from the equipment location, an individual shutoff valve for each apartment or tenant line
shall be provided at a convenient point of general
accessibility.
In a common system serving a number of individual buildings, shutoff valves shall be installed at
each building. [NFPA 54:7.9.2.2]
12110.11.3 Emergency Shutoff Valves. An exterior shutoff valve to permit turning off the gas supply to
each building in an emergency shall be provided. The
emergency shutoff valves shall be plainly marked as such
and their locations posted as required by the Authority
Having Jurisdiction. [NFPA 54:7.9.2.3]
12110.11.4 Shutoff Valve For Laboratories. Each
laboratory space containing two (2) or more gas outlets
installed on tables, benches, or in hoods in educational,
research, commercial and industrial occupancies shall
have a single shutoff valve through which such gas outlets are supplied. The shutoff valve shall be accessible
and shall be located within the laboratory or located adjacent to the laboratory’s egress door and shall be identified. [NFPA 54-09:7.9.2.4]
12110.12 Prohibited Devices. No device shall be placed
inside the gas piping or fittings that will reduce the cross-sectional area or otherwise obstruct the free flow of gas, except
where proper an allowance in the piping system design has
been made for such a device and where approved by the Authority Having Jurisdiction. [NFPA 54:7.10]
12110.13 Systems Containing Gas-Air Mixtures Outside the Flammable Range. Where gas-air mixing machines are employed to produce mixtures above or below the
flammable range, they shall be provided with stops to prevent adjustment of the mixture to within or approaching the
flammable range. [NFPA 54:7.11]
12110.14 Systems Containing Flammable Gas-Air
Mixtures. Systems containing flammable gas-air mixtures
shall be in accordance with NFPA 54.
12110.15 Electrical Bonding and Grounding.
12110.15.1 Pipe and Tubing other than CSST.
Each above ground portion of a gas piping system other
than CSST that is likely to become energized shall be
electrically continuous and bonded to an effective
ground-fault current path. Gas piping, other than CSST
shall be considered to be bonded when where it is connected to appliances that are connected to the appliance
grounding conductor of the circuit supplying that appliance. [NFPA 54-09:7.13.1]
12110.15.2 Bonding of CSST Gas Piping. CSST
gas piping systems shall be bonded to the electrical service grounding electrode system at the point where the gas
service enters the building. The bonding jumper shall
connect to a metallic pipe or fitting between the point of
delivery and the first downstream CSST fitting. The
bonding jumper shall be not smaller than six (6) AWG
copper wire or equivalent. Gas piping systems that contain one or more segments of CSST shall be bonded in
accordance with this section. [NFPA 54-0912:7.13.2]
183
FUEL PIPING
12110.15.3 Grounding Conductor or Electrode.
Gas piping shall not be used as a grounding conductor
or electrode. This does not preclude the bonding of
metallic piping to a grounding system. [NFPA 540912:7.13.3]
12110.15.4 Lighting Protection System. Where a
lightning protection system is installed, the bonding of
the gas piping system shall be in accordance with NFPA
780, Standard for Installation of Lightning Protection
Systems. [NFPA 54-09:7.13.4]
12110.16 Electrical Circuits. Electrical circuits shall not
utilize gas piping or components as conductors. [NFPA
54:7.14]
Exception: Low-voltage (50V or less) control circuits, ignition circuits, and electronic flame detection device circuits
shall be permitted to make use of piping or components as a
part of an electric circuit.
12110.17 Electrical Connections.
1210.17.1 Connections. (A) Electrical connections
between wiring and electrically operated control devices
in a piping system shall conform to comply with the requirements of NFPA 70, National Electrical Code. (See
Section 1211.14) [NFPA 54:7.15.1]
1210.17.2 Safety Control. (B) Any An essential
safety control depending on electric current as the operating medium shall be of a type that will shut off (fail
safe) the flow of gas in the event of current failure.
[NFPA 54:7.15.2]
12121.0 Appliance Connections to Building Piping.
12121.1 Connecting Gas Appliances. Gas utilization
aAppliances shall be connected to the building piping in compliance accordance with Sections 12121.5 and Section
12121.6 by one of the following [NFPA 54:9.6.1]:
(1) Rigid metallic pipe and fittings. [NFPA 54:9.6.1(1)]
(2) Semirigid metallic tubing and metallic fittings. Aluminum alloy tubing shall not be used in exterior locations. [NFPA 54:9.6.1(2)]
(3) A Llisted flexible gas connectors installed in compliance
accordance with CSA ANSI Z21.24/CSA 6.10, Standard
for Connectors for Gas Appliances. The connector shall
be used in accordance with the terms of their listing that
are completely manufacturer’s installation instructions
and shall be in the same room as the appliance. One connector shall be used per appliance. [NFPA 54:9.6.1(3)]
(4) CSST where installed in accordance with the manufacturer's installation instructions. [NFPA 54:9.6.1(5)]
(5) Listed nonmetallic gas hose connectors installed in accordance with Section 12121.3. [NFPA 54:9.6.1(6)]
(6) Gas-fired food service (cCommercial cooking) appliances
listed for use with casters or otherwise subject to movement that are moved for cleaning and sanitation purposes,
and other large and heavy gas utilization appliances that
can be moved, shall be connected in accordance with the
184
connector manufacturer's installation instructions using a
listed appliance connector complying that is in accordance with CSA ANSI Z21.69/CSA 6.22, Standard for
Connectors for Movable Gas Appliances. The commercial cooking appliance connector installation shall be configured in accordance with the manufacturer’s installation
instructions. (NFPA 54:9.6.1.1)
(7) Movement of appliances with casters shall be limited by
a restraining device installed in accordance with the connector and appliance manufacturer's installation instructions. [NFPA 54-09:9.6.1.2]
(8) In Sections 12121.1(2), 1211.1(3), and 1211.1(5), the
connector or tubing shall be installed so as to be protected against physical and thermal damage. Aluminum
alloy tubing and connectors shall be coated to protect
against external corrosion where they are in contact with
masonry, plaster, insulation, or are subject to repeated
wettings by such liquids as water (except rainwater), detergents, or sewage.[NFPA 54:9.6.1(7)]
12121.2 Suspended Low-Intensity Infrared Tube
Heaters. Suspended low-intensity infrared tube heaters shall
be connected to the building piping system with a connector
listed for the application in accordance with CSA ANSI
Z21.24/CGA 6.10, Connectors for Gas Appliances and the
following requirements. [NFPA 54-09:9.6.1.3]
(A1) The connector shall be installed in accordance with the
tube heater installation instructions, and shall be in the
same room as the appliance.
(B2) Only oOne connector shall be used per appliance.
12121.3 Use of Nonmetallic Gas Hose Connectors.
Listed nonmetallic gas hose connectors shall be used in accordance with the terms of their listing manufacturer’s installation instructions and as follows indicated in the
following sections. [NFPA 54:9.6.2]:
1211.3.1 (A) Indoor. Indoor gas hose connectors shall
be used only to connect laboratory, shop, and ironing
equipment requiring mobility during operation. An
equipment appliance shutoff valve shall be installed
where the connector is attached to the building piping.
The connector shall be of minimum length and shall not
exceed six (6) feet (1,829 mm). The connector shall not
be concealed and shall not extend from one (1) room to
another or pass through wall partitions, ceilings, or
floors.
1211.3.2 (B) Outdoor. Where Ooutdoor gas hose connectors are permitted used to connect portable outdoor
gas-fired appliances, the connector shall be listed in accordance with CSA Z21.54b. An appliance shutoff valve,
a listed quick-disconnect device, or a listed gas convenience outlet shall be installed where the connector is attached to the supply piping and in such a manner to
prevent the accumulation of water or foreign matter. This
connection shall be made only in the outdoor area where
the appliance is to be used. The connector length shall
not exceed fifteen (15) feet (4,572 mm).
UNIFORM PLUMBING CODE
FUEL PIPING
12121.4 Connection of Portable and Mobile Industrial Gas Appliance.
1211.4.1 Flexible Hose (A) Where portable industrial
gas utilization appliances, or appliances requiring mobility or subject to vibration, are connected to the building gas piping system by the use of a flexible hose, the
hose shall be suitable approved and safe for the conditions under which it can be is used. [NFPA 54:9.6.3.1]
1211.4.2 Swivel Joints or Couplings. (B) Where
industrial gas utilization appliances requiring mobility are
connected to the rigid piping by the use of swivel joints or
couplings, the swivel joints or couplings shall be suitable
approved for the service required, and only the minimum
number required shall be installed. [NFPA 54:9.6.3.2]
1211.4.3 All-Metal Flexible Connectors. (C) Where
industrial gas utilization appliances subject to vibration
are connected to the building piping system by the use
of all-metal flexible connectors, the connectors shall be
suitable approved for the service required. [NFPA
54:9.6.3.3]
1211.4.4 Flexible Connectors. (D) Where flexible
connections are used, they shall be of the minimum practical length and shall not extend from one (1) room to another or pass through any walls, partitions, ceilings, or
floors. Flexible connections shall not be used in any a concealed location. They shall be protected against physical or
thermal damage and shall be provided with gas shutoff
valves in readily accessible locations in rigid piping upstream from the flexible connections. [NFPA 54:9.6.3.4]
12121.5 Appliance Shutoff Valves and Connections.
Gas utilization aAppliance connected to a piping system shall
have an accessible, approved manual shutoff valve with a
nondisplaceable valve member, or a listed gas convenience
outlet installed within six (6) feet (1.8 1829 mm) of the appliance it serves. Where a connector is used, the valve shall
be installed upstream of the connector. A union or flanged
connection shall be provided downstream from this valve to
permit removal of controls. Shutoff valves serving decorative
gas appliances shall be permitted to be installed in fireplaces
if where listed for such use. [NFPA 54:9.6.4]
12121.6 Quick-Disconnect Devices. Quick-disconnect
devices used to connect appliances to the building piping shall
be listed. Where they are installed indoors, an approved manual shutoff valve with a nondisplaceable valve member shall
be installed upstream of the quick-disconnect device. [NFPA
54:9.6.5]
12121.7 Sediment Trap. Where a sediment trap is not incorporated as a part of the gas utilization appliance, a sediment trap shall be installed downstream of the appliance
shutoff valve as close to the inlet of the appliance as practical at the time of appliance installation. The sediment trap
shall be either a tee fitting with a capped nipple in the bottom
outlet, as illustrated in Figure 12-1 1211.7, or other device
recognized as an effective sediment trap. Illuminating appliances, ranges, clothes dryers, decorative vented appliances
for installation in vented fireplaces, gas fireplaces, and outdoor grills shall not be required to be so equipped. [NFPA 5409:9.6.7]
UNIFORM PLUMBING CODE
For SI units: 1 inch = 25.4 mm
FIGURE 12-1 1211.7 METHOD OF INSTALLING A
TEE FITTING SEDIMENT TRAP.
12121.8 Installation of Piping. Piping shall be installed
in a manner not to interfere with inspection, maintenance, or
servicing of the gas utilization equipment appliance. [NFPA
54:9.6.8]
12132.0 Liquefied Petroleum Gas Facilities and Piping.
1212.1 General. Liquefied petroleum gas facilities shall
comply with NFPA 58, Liquefied Petroleum Gas Code.
12143.0 Pressure Testing and Inspection.
12143.1 General.
12143.1.1 Inspection and Testing. Prior to acceptance and initial operation, piping installations shall be
visually inspected and pressure-tested to determine that
the materials, design, fabrication, and installation practices comply are in accordance with the requirements of
this code. [NFPA 54-12:8.1.1.1]
12143.1.2 Inspection Requirements. Inspection
shall consist of visual examination during or after manufacture, fabrication, assembly, or pressure tests., as appropriate. Supplementary types of non-destructive
inspection techniques, such as magnetic-particle, radiographic, and ultrasonic, shall not be required unless
specifically listed herein or in the engineering design.
[NFPA 54-12:8.1.1.2]
12143.1.3 Repairs and Additions. Where repairs or
additions are made following the pressure test, the affected piping shall be tested. Minor repairs and additions
are not required to be pressure-tested provided that the
work is inspected and connections are tested with a noncorrosive leak-detecting fluid or other leak-detecting
methods approved by the Authority Having Jurisdiction.
[NFPA 54:8.1.1.3]
12143.1.4 New Branches. Where new branches are
installed from the point of delivery to new appliances,
only the newly installed branches shall be required to be
pressure-tested. Connections between the new piping and
185
FUEL PIPING
the existing piping shall be tested with a noncorrosive
leak-detecting fluid or approved leak-detecting methods.
[NFPA 54:8.1.1.4]
12143.1.5 Testing. A piping system shall be tested as
a complete unit or in sections. Under no circumstances
shall a valve in a line be used as a bulkhead between gas
in one (1) section of the piping system and test medium
in an adjacent section, unless two (2) valves are installed
in series with a valved "telltale" located between these
valves. A valve shall not be subjected to the test pressure
unless it can be is determined that the valve, including
the valve-closing mechanism, is designed to safely withstand the pressure. [NFPA 54:8.1.1.5]
12143.1.6 Regulators and Valves. Regulator and
valve assemblies fabricated independently of the piping
system in which they are to be installed shall be permitted to be tested with inert gas or air at the time of fabrication. [NFPA 54:8.1.1.6]
12143.1.7 Test Medium. The test medium shall be air,
nitrogen, carbon dioxide, or an inert gas. OXYGEN
SHALL NEVER BE USED. [NFPA 54:8.1.2]
12143.2 Test Preparation.
12143.2.1 Pipe Joints. Pipe joints, including welds,
shall be left exposed for examination during the test.
[NFPA 54:8.1.3.1]
Exception: Covered or concealed pipe end joints that
have been previously tested in accordance with this code.
12143.2.2 Expansion Joints. Expansion joints shall
be provided with temporary restraints, if where required
for the additional thrust load under test. [NFPA
54:8.1.3.2]
12143.2.3 Appliances and Equipment. Appliances
and equipment that are not to be included in the test shall
be either disconnected from the piping or isolated by
blanks, blind flanges, or caps. Flanged joints at which
blinds are inserted to blank off other equipment during
the test shall not be required to be tested. [NFPA
54:8.1.3.3]
12143.2.4 Designed for (less than) Operating
Pressures. Where the piping system is connected to
appliances, equipment, or equipment components designed for operating pressures of less than the test pressure, such appliances, equipment, or equipment
components shall be isolated from the piping system by
disconnecting them and capping the outlets. [NFPA
54:8.1.3.4]
12143.2.5 Designed for (equal to or more than)
Operating Pressures. Where the piping system is
connected to appliances, equipment, or equipment components designed for operating pressures equal to or
greater than exceeding the test pressure, such appliances
and equipment shall be isolated from the piping system
by closing the individual appliance or equipment shutoff
valve(s). [NFPA 54:8.1.3.5]
12143.2.6 Safety. Testing of piping systems shall be
done with due regard for the safety of employees and the
public during the test. Bulkheads, anchorage, and bracing
186
suitably designed to resist test pressures shall be installed
if where necessary. Prior to testing, the interior of the pipe
shall be cleared of foreign material. [NFPA 54:8.1.3.6]
12143.3 Test Pressure.
12143.3.1 General. Test pressure shall be measured
with a manometer or with a pressure-measuring device
designed and calibrated to read, record, or indicate a
pressure loss due to leakage during the pressure test period. The source of pressure shall be isolated before the
pressure tests are made. Mechanical gauges used to
measure test pressures shall have a range such that the
highest end of the scale does not exceed five (5) times
the test pressure. [NFPA 54:8.1.4.1]
1214.3.2 The test pressure to be used shall be not less
than one and one half (1-1⁄2) times the proposed maximum working pressure, but not less than three (3) psi (20
kPa), irrespective of design pressure. [NFPA 54:8.1.4.2]
1214.3.3 Test duration shall be not less than one-half
(1⁄2) hour for each five-hundred (500) cubic feet (14 m3)
of pipe volume or fraction thereof. When testing a system
having a volume less than ten (10) cubic feet (0.28 m3)
or a system in a single-family dwelling, the test duration
shall be not less than ten (10) minutes. The duration of
the test shall not be required to exceed twenty-four (24)
hours. [NFPA 54:8.1.4.3] This inspection shall include
an air, CO2, or nitrogen pressure test, at which time the
gas piping shall stand a pressure of not less than 10 psi
(69 kPa) gauge pressure. Test pressures shall be held for
a length of time satisfactory to the Authority Having Jurisdiction, but in no case less than 15 minutes with no
perceptible drop in pressure. For welded piping, and for
piping carrying gas at pressures in excess of 14 inches
water column pressure (3.5 kPa), the test pressure shall
be not less than 60 psi (414 kPa) and shall be continued
for a length of time satisfactory to the Authority Having
Jurisdiction, but in no case for less than 30 minutes.
These tests shall be made using air, CO2, or nitrogen
pressure and shall be made in the presence of the Authority Having Jurisdiction. Necessary apparatus for conducting tests shall be furnished by the permit holder. Test
gauges used in conducting tests shall be in accordance
with Section 317.0.
12143.4 Detection of Leaks and Defects.
12143.4.1 Indication of Leaks. The piping system
shall withstand the test pressure specified without showing any evidence of leakage or other defects. Any rReduction of test pressures as indicated by pressure gauges
shall be deemed to indicate the presence of a leak unless
such reduction can be is readily attributed to some other
cause. [NFPA 54:8.1.5.1]
12143.4.2 Detecting Leaks. The leakage shall be located by means of an approved gas detector, a noncorrosive leak detection fluid, or other approved leak detection
methods. Matches, candles, open flames, or other methods that provide a source of ignition shall not be used.
[NFPA 54:8.1.5.2]
UNIFORM PLUMBING CODE
FUEL PIPING
12143.4.3 Repair or Replace. Where leakage or
other defects are located, the affected portion of the piping system shall be repaired or replaced and retested.
[(See Section 1214.1.3).] [NFPA 54:8.1.5.3]
12143.5 Piping Systems Leak Check.
12143.5.1 Test Gases. Leak checks using fuel gas
shall be permitted in piping systems that have been pressure-tested in accordance with Section 12143.0. [NFPA
54:8.2.1]
12143.5.2 Turning Gas On. During the process of
turning gas on into a system of new gas piping, the entire
system shall be inspected to determine that there are no
open fittings or ends and that valves at unused outlets are
closed and plugged or capped. [NFPA 54-09:8.2.2]
12143.5.3 Leak Check. Immediately after the gas is
turned on into a new system or into a system that has
been initially restored after an interruption of service, the
piping system shall be checked for leakage. Where leakage is indicated, the gas supply shall be shut off until the
necessary repairs have been made. [NFPA 54:8.2.3]
12143.5.4 Placing Appliances and Equipment in
Operation. Gas utilization aAppliances and equipment
shall not be placed in operation until after the piping system has been tested checked in accordance with Section
12143.5.3, connections to the appliance are checked for
leakage, and purged in accordance with Section 12143.6.2.
[NFPA 54-12:8.2.4]
1214.6 Purging.
1214.6.1 Removal From Service. When gas piping
is to be opened for servicing, addition, or modification,
the section to be worked on shall be turned off from the
gas supply at the nearest convenient point and the line
pressure vented to the outdoors or to ventilated areas of
sufficient size to prevent accumulation of flammable
mixtures. The remaining gas in this section of pipe shall
be displaced with an inert gas as required by Table 12-5.
[NFPA 54:8.3.1]
1214.6.2 Placing in Operation. When piping full of
air is placed in operation, the air in the piping shall be displaced with fuel gas, except where such piping is required
by Table 12-6 to be purged with an inert gas prior to introduction of fuel gas. The air can be safely displaced with
fuel gas provided that a moderately rapid and continuous
flow of fuel gas is introduced at one (1) end of the line
and air is vented out at the other end. The fuel gas flow
shall be continued without interruption until the vented
gas is free of air. The point of discharge shall not be left
unattended during purging. After purging, the vent shall
then be closed. Where required by Table 12-6, the air in
the piping shall first be displaced with an inert gas, and
the inert gas shall then be displaced with fuel gas. [NFPA
54:8.3.2]
1214.6.3 Discharge of Purged Gases. The open
end of piping systems being purged shall not discharge
into confined spaces or areas where there are sources of
ignition unless precautions are taken to perform this opUNIFORM PLUMBING CODE
eration in a safe manner by ventilation of the space, control of purging rate, and elimination of hazardous conditions. [NFPA 54:8.3.3]
1214.6.4 Placing Appliances in Operation. After
the piping has been placed in operation, appliances shall
be purged and then placed in operation, as necessary.
[NFPA 54:8.3.4]
1213.6 Purging. Purging shall comply with Section
1213.6.1 and Section 1213.6.4.
1213.6.1 Where Required.
1213.6.1.1 Conditions. The purging of piping
systems shall be in accordance with Section
1213.6.2 through Section 1213.6.4 where the piping
system meets either of the following:
(1) The designed operating gas pressure is greater
than 2 psig (14 kPa).
(2) The piping being purged contains pipe sizes
greater than 2 inches (50 mm).
1213.6.1.2 Monitored. Where piping systems not
covered under Section 1213.6.1.1 are purged with
fuel gas the discharge point, whether indoor or outdoor, shall be attended and monitored with a combustible gas indicator and purging stopped where
fuel gas is indicated at the discharge point.
1213.6.2 Removal From Service. Where existing
gas piping meeting Section 1213.6.1 is to be opened for
an addition, or modification, or service, the section to be
worked on shall be isolated from the gas supply and the
line pressure vented in accordance with Section 1213.6.4.
Where gas piping meeting the criteria of Table 1213.6.2
is removed from service the residual fuel gas in the piping shall be displaced with an inert gas.
TABLE 12-5 1213.6.2
LENGTH OF PIPING REQUIRING PURGING WITH INERT GAS
FOR SERVICING OR MODIFICATION
[NFPA 54: TABLE 8.3.1 ]
(inch.)
LENGTH OF PIPING
REQUIRING PURGING
(feet.)
3
> 30
NOMINAL PIPE SIZE
21⁄2
4
6
8 or larger
> 50
> 15
> 10
Any length
For SI units: 1 inch = 25 mm, 1 foot. = 0.305 304.8 mm.
1213.6.3 Placing in Operation. Where gas piping
meeting the criteria of Table 1213.6.2, containing air, is
placed in operation the air in the piping shall first be displaced with an inert gas. The inert gas shall then be displaced with fuel gas in accordance with Section 1213.6.4.
1213.6.4 Outdoor Discharge of Purged Gases.
The open end of piping systems being pressure vented
or purged shall discharge directly to an outdoor location
in accordance with the following requirements:
187
FUEL PIPING
(1) The point of discharge shall be controlled with a
shutoff valve.
(2) The discharge point shall be not less than 10 feet
(3048 mm) from sources of ignition, located not less
than 10 feet (3048 mm) from building openings, and
not less than 25 feet (7620 mm) from mechanical air
intake openings.
(3) During discharge, the open discharge point shall be
continuously attended and monitored with a combustible gas indicator.
TABLE 12-6
Length of Piping Requiring Purging with Inert Gas Before
Placing in Operation
[NFPA 54: Table 8.3.2]
NOMINAL PIPE SIZE (in.)
3
4
6
8 or larger
For SI units: 1 ft. = 0.305 m.
LENGTH OF PIPING REQUIRING
PURGING (ft.)
> 30
> 15
> 10
Any length
12154.0 Interconnections Between Gas Piping Systems. [NFPA 54:5.3]
12154.1 Interconnections Supplying Separate
Users. Where two (2) or more meters, or two (2) or more
service regulators where meters are not provided, are located
on the same premises and supply separate users, the gas-piping systems shall not be interconnected on the outlet side of
the meters or service regulators. [NFPA 54:5.3.1]
12154.2 Interconnections for Standby Fuels. Where
supplementary gas for standby use is connected downstream
from a meter or a service regulator where a meter is not provided, a device to prevent backflow shall be installed. [NFPA
54:5.3.2.1] A three-way valve installed to admit the standby
supply and at the same time shut off the regular supply shall
be permitted to be used for this purpose. [NFPA 54:5.3.2.2]
12165.0 Required Gas Supply.
12165.1 General. The following regulations, as set forth in
this section and in Section 12176.0, Required Gas Piping
Size, shall be the standard for the installation of gas piping.
Natural gas regulations and tables are based on the use of gas
having a specific gravity of sixty-hundredths (0.60), supplied
at six (6) to eight (8) inches (152 to 203 mm) water column
(1.5 kPa to 1.9 kPa) pressure at the outlet of the meter or regulator. For undiluted liquefied petroleum gas, gas piping shall
be permitted to be sized at eleven (11) inches (279 mm) water
column (2.7 kPa) pressure at the outlet of the meter or regulator and specific gravity of one and fifty-hundredths (1.50).
Note: Where gas of a different specific gravity is to be delivered, the serving gas supplier should be contacted for specific
gravity conversion factors to use provided by the serving gas
supplier shall be used in sizing piping systems from the pipe
sizing tables in this chapter.
12165.2 Volume. The hourly volume of gas required at
each piping outlet shall be taken as not less than the maxi188
mum hourly rating as specified by the manufacturer of the
appliance or appliances to be connected to each such outlet.
12165.3 Gas Appliances. Where the gas appliances to be
installed have not been definitely specified, Table 12-1
1208.4.2 shall be permitted to be used as a reference to estimate requirements of typical appliances.
To obtain the cubic feet per hour (L/sec.) of gas required,
divide input of appliances by the average Btu (Watt-hour kW)
heating value per cubic foot (L) of the gas. The average Btu
(Watt-hour kW) per cubic foot (L) of the gas in the area of
the installation shall be permitted to be obtained from the
serving gas supplier.
12165.4 Size of Piping Outlets. The size of the supply
piping outlet for any a gas appliance shall not be less than
one-half (1⁄2) of an inch (15 mm).
The minimum size of any a piping outlet for a mobile home
shall be not less than three-quarters (3⁄4) of an inch (20 mm).
12176.0 Required Gas Piping Size.
12176.1 Pipe Sizing Methods. Where the pipe size is to
be determined using any a of the methods in Sections
12176.1.1 through Section 12176.1.3, the diameter of each
pipe segment shall be obtained from the pipe-sizing tables in
Section 12176.2 or from the sizing equations in Section
12176.3. [NFPA 54:6.1]
12176.1.1 Longest Length Method. The pipe size of
each section of gas piping shall be determined using the
longest length of piping from the point of delivery to the
most remote outlet and the load of the section (sSee calculation example in Figure 12-2 1216.1.1). [NFPA 54:6.1.1]
12176.1.2 Branch Length Method. Pipe shall be
sized as follows [NFPA 54:6.1.2]:
(1) (A) Pipe size of each section of the longest pipe run
from the point of delivery to the most remote outlet
shall be determined using the longest run of piping
and the load of the section.
(2) (B) The pipe size of each section of branch piping not
previously sized shall be determined using the length
of piping from the point of delivery to the most remote outlet in each branch and the load of the section.
12176.1.3 Hybrid Pressure. The pipe size for each section of higher-pressure gas piping shall be determined using
the longest length of piping from the point of delivery to the
most remote line pressure regulator. The pipe size from the
line pressure regulator to each outlet shall be determined
using the length of piping from the regulator to the most
remote outlet served by the regulator. [NFPA 54:6.1.3]
12176.2 Tables for Sizing Gas-Piping Systems. Tables 12-8 1216.2(1) through Table 12-41 1216.2(36) shall be
used to size gas piping in conjunction with one (1) of the
methods described in Sections 12176.1.1 through Section
12176.1.3. [NFPA 54:6.2]
12176.3 Sizing Equations. The inside diameter of
smooth-wall pipe or tubing shall be determined by the sizing
eEquations 12-1 1216.3(1) or Equation 12-2 1216.3(2), using
the equivalent pipe length determined by Sections 12176.1.1
through Section 12176.1.3. [NFPA 54:6.4]
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-4 1216.3
Cr AND Y FOR NATURAL GAS AND UNDILUTED PROPANE AT
STANDARD CONDITIONS [NFPA 54: TABLE 6.4.2]
Cr
FORMULA FACTORS GAS
Natural Gas
0.6094
Undiluted Propane
1.2462
Y
0.9992
0.9910
For SI units: 1 ft.3 cubic foot = 0.0283 m3, 1 foot = 0.3054.8mm, 1 inch water
column = 0.249 kPa, 1 psi pound-force per square inch = 6.894 kPa, 1,000
Btu/h British thermal units per hour = 0.293 kW.
Equation 12-1 1216.3(1) Low-Pressure Gas Formula (Less
than 1.5 psi [10.3 kPa]): [NFPA 54:6.4.1]
D=
19.17
Q0.381
( )
0.206
∆H
Cr x L
where:
D = inside diameter of pipe, inches
Q = input rate appliance(s), cubic feet per hour at 60˚F
(16ºC) and 30 inch (759 mm) mercury column
P1 = upstream pressure, psia (P1 + 14.7)
P2 = downstream pressure, psia (P2 + 14.7)
L = equivalent length of pipe, feet
∆H =pressure drop, inches water column (27.7 in. H2O=1 psi)
Cr and Y in accordance with with Table 1216.3
For SI units: 1 inch = 25 mm, 1 pound-force per square inch = 6.894 kPa, t/°C
= (t/°F-32)/1.8, 1 inch mercury column = 3.39 kPa, 1 inch water column =
0.249 kPa.
Equation 12-2 1216.3(2) High-Pressure Gas Formula (1.5
psi [10.3 kPa] and above): [NFPA 54:6.4.2]
D=
[
Q0.381
]
0.206
2
2
18.93 (P1 – P2 ) • Y
Cr x L
where:
D = inside diameter of pipe, inches
Q = input rate appliance(s), cubic feet per hour at 60ºF
(16ºC) and 30 inch (759 mm) mercury column
P1 = upstream pressure, psia (P1 + 14.7)
P2 = downstream pressure, psia (P2 + 14.7)
L = equivalent length of pipe, feet.
∆H = pressure drop, inches water column (27.7 in. H2O=1 psi)
Cr and Y in accordance with with Table 1216.3
12176.4 Sizing of Piping Sections. To determine the size
of each section of pipe in any a system within the range of
the Table 1216.2(1) through Table 1216.2(36), proceed as follows:
(1) (A) Measure the length of the pipe from the gas
meter location to the most remote outlet on the system.
(2) (B) Select the length in feet column and row showing the
distance, or the next longer distance if where the table
does not give the exact length.
(3) (C) Starting at the most remote outlet, find in the row
just selected the gas demand for that outlet. If Where the
exact figure of demand is not shown, choose the next
larger figure in the row.
(4) (D) At the top of this column will be found the correct
size of pipe.
(5) (E) Using this same row, proceed in a similar manner for
each section of pipe serving this outlet. For each section
of pipe, determine the total gas demand supplied by that
section. Where gas piping sections serve both heating
and cooling appliances and the installation prevents both
units from operating simultaneously, only the larger of
the two (2) demand loads needs be used in sizing these
sections.
(6) (F) Size each section of branch piping not previously
sized by measuring the distance from the gas meter location to the most remote outlet in that branch and follow
the procedures of steps B, C, D, and E 2, 3, 4, and 5
above. Note: Size branch piping in the order of their distance from the meter location, beginning with the most
distant outlet not previously sized.
12176.5 Engineering Methods. For conditions other than
those covered by Section 12176.1, such as longer runs or
greater gas demands, the size of each gas piping system shall
be determined by standard engineering methods acceptable
to the Authority Having Jurisdiction, and each such system
shall be so designed that the total pressure drop between the
meter or other point of supply and any an outlet when where
full demand is being supplied to all outlets, shall comply be
in accordance with the requirements of Section 12098.4.
12176.6 Variable Gas Pressure. Where the gas pressure
exceeds fourteen (14) inches (356 mm 3.5 kPa) or less than
six (6) inches (152 mm 1.5 kPa) of water column, or when
where diversity demand factors are used, the design, pipe, sizing, materials, location, and use of such systems first shall be
approved by the Authority Having Jurisdiction. Piping systems designed for pressures exceeding the serving gas supplier's standard delivery pressure shall have prior verification
from the gas supplier of the availability of the design pressure.
For SI units: 1 inch = 25 mm, 1 pound-force per square inch = 6.894 kPa, t/°C
= (t/°F-32)/1.8, 1 inch mercury column = 3.39 kPa, 1 inch water column =
0.249 kPa.
UNIFORM PLUMBING CODE
189
FUEL PIPING
FIGURE 12-2 1216.1.1 EXAMPLE ILLUSTRATING USE OF TABLES 12-1 1208.4.2 AND 12-8 1216.2(1)
Problem: Determine the required pipe size of each section and outlet of the piping system shown in Figure 12-2 1216.1.1. Gas
to be used has a specific gravity of sixty-hundredths (0.60) and eleven-hundred (1,100) British thermal units (Btu) per cubic
foot (11.4 0.0114 Watt-hour/L kW/L), delivered at eight (8) inch (203 mm 1.9 kPa) water column pressure.
For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 cubic foot per hour = 0.00787 L/s
Solution:
(1) Maximum gas demand of outlet A —
32 cubic feet per hour (0.215 L/sec.) (from Table 12-1 1208.4.2).
Maximum gas demand of outlet B —
3 cubic feet per hour (0.02 L/sec.) (from Table 12-1 1208.4.2).
Maximum gas demand of outlet C —
59 cubic feet per hour (0.46 L/sec.) (from Table 12-1 1208.4.2).
Maximum gas demand of outlet D —
136 cubic feet per hour (1.1 L/sec.) (150,000 Btu/hour [43,950 kW])
divided by 1,100 Btu per cubic foot (11.4 Watt-hour/L 0.0114 kW/L)
(2) The length of pipe from the gas meter to the most remote outlet (outlet A) is 60 feet (18,288 mm).
(3) Using the length in feet column row marked 60 feet (18,288 mm) in Table 12-8 1216.2(1):
Outlet A, supplying 32 cubic feet per hour (0.215 L/sec.), requires one-half (1⁄2) of an inch (15 mm) pipe. Section 1, supplying
outlets A and B, or 35 cubic feet per hour (ft3/h)(0.27 L/s) (0.24 L/sec.) requires one-half (1⁄2) of an inch (15 mm) pipe.
Section 2, supplying outlets A, B, and C, or 94 cubic feet per hour (0.74 L/sec.) requires three-quarters (3⁄4) of an inch (20
mm) pipe.
Section 3, supplying outlets A, B, C, and D, or 230 cubic feet per hour (1.809 L/sec.), requires one (1) inch (25 mm) pipe.
(4) Using the column marked 60 feet (18,288 mm) in Table 12-8 1216.2(1) (no column for actual length of 55 feet [16,764
mm]:
Outlet B supplying 3 cubic feet per hour (0.02 L/sec.), requires one-half (1⁄2) of an inch (15 mm) pipe.
Outlet C, supplying 59 cubic feet per hour (0.46 L/sec.), requires one-half (1⁄2) of an inch (15 mm) pipe.
(5) Using the column marked 60 feet (18,288 mm) in Table 12-8 1216.2(1):
Outlet D, supplying 136 cubic feet per hour (1.107 L/sec.), requires (3⁄4) of an inch (20 mm) pipe.
190
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-8 1216.2(1)
SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.2(b)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2 psi
PRESSURE DROP: 0.5 in w.c.
NOMINAL:
ACTUAL ID:
LENGTH
(feet)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
⁄2
3
⁄4
1
11⁄4
11⁄2
2
21⁄2
PIPE SIZE (inch)
3
4
SPECIFIC GRAVITY: 0.60
5
6
8
10
12
0.622
0.824
1.049
1.380
1.610
2.067
2.469
3.068
4.026
5.047
6.065
7.981
10.020
11.938
172
118
95
81
72
65
60
56
52
50
44
40
37
34
30
27
25
23
22
21
20
19
18
17
17
16
16
15
15
14
14
13
12
12
11
11
11
10
10
NA
360
247
199
170
151
137
126
117
110
104
92
83
77
71
63
57
53
49
46
43
41
39
38
36
35
34
33
32
31
30
28
27
26
25
24
23
22
22
21
20
678
466
374
320
284
257
237
220
207
195
173
157
144
134
119
108
99
92
86
82
78
74
71
68
66
63
61
59
58
56
53
51
49
47
45
44
42
41
40
39
1390
957
768
657
583
528
486
452
424
400
355
322
296
275
244
221
203
189
177
168
159
152
145
140
135
130
126
122
118
115
109
104
100
96
93
89
86
84
81
79
2090
1430
1150
985
873
791
728
677
635
600
532
482
443
412
366
331
305
283
266
251
239
228
218
209
202
195
189
183
178
173
164
156
150
144
139
134
130
126
122
119
4020
2760
2220
1900
1680
1520
1400
1300
1220
1160
1020
928
854
794
704
638
587
546
512
484
459
438
420
403
389
375
363
352
342
333
316
301
289
277
267
258
250
242
235
229
6400
4400
3530
3020
2680
2430
2230
2080
1950
1840
1630
1480
1360
1270
1120
1020
935
870
816
771
732
699
669
643
619
598
579
561
545
530
503
480
460
442
426
411
398
386
375
364
11 300
7780
6250
5350
4740
4290
3950
3670
3450
3260
2890
2610
2410
2240
1980
1800
1650
1540
1440
1360
1290
1240
1180
1140
1090
1060
1020
992
963
937
890
849
813
781
752
727
703
682
662
644
23 100
15 900
12 700
10 900
9660
8760
8050
7490
7030
6640
5890
5330
4910
4560
4050
3670
3370
3140
2940
2780
2640
2520
2410
2320
2230
2160
2090
2020
1960
1910
1810
1730
1660
1590
1530
1480
1430
1390
1350
1310
41 800
28 700
23 000
19 700
17 500
15 800
14 600
13 600
12 700
12 000
10 600
9650
8880
8260
7320
6630
6100
5680
5330
5030
4780
4560
4360
4190
4040
3900
3780
3660
3550
3460
3280
3130
3000
2880
2780
2680
2590
2520
2440
2380
67 600
46 500
37 300
31 900
28 300
25 600
23 600
22 000
20 600
19 500
17 200
15 600
14 400
13 400
11 900
10 700
9880
9190
8620
8150
7740
7380
7070
6790
6540
6320
6110
5930
5760
5600
5320
5070
4860
4670
4500
4340
4200
4070
3960
3850
139 000
95 500
76 700
65 600
58 200
52 700
48 500
45 100
42 300
40 000
35 400
32 100
29 500
27 500
24 300
22 100
20 300
18 900
17 700
16 700
15 900
15 200
14 500
14 000
13 400
13 000
12 600
12 200
11 800
11 500
10 900
10 400
9980
9590
9240
8920
8630
8370
8130
7910
252 000
173 000
139 000
119 000
106 000
95 700
88 100
81 900
76 900
72 600
64 300
58 300
53 600
49 900
44 200
40 100
36 900
34 300
32 200
30 400
28 900
27 500
26 400
25 300
24 400
23 600
22 800
22 100
21 500
20 900
19 800
18 900
18 100
17 400
16 800
16 200
15 700
15 200
14 800
14 400
399 000
275 000
220 000
189 000
167 000
152 000
139 000
130 000
122 000
115 000
102 000
92 300
84 900
79 000
70 000
63 400
58 400
54 300
50 900
48 100
45 700
43 600
41 800
40 100
38 600
37 300
36 100
35 000
34 000
33 100
31 400
30 000
28 700
27 600
26 600
25 600
24 800
24 100
23 400
22 700
CAPACITY IN CUBIC FEET OF GAS PER HOUR
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column =
0.249 kPa
Notes:
(1) All tTable entries are rounded to 3 significant digits.
(2) NA means a flow of less than 10 cfh ft3/h (0.08 L/s).
UNIFORM PLUMBING CODE
191
FUEL PIPING
TABLE 1216.2(2)
SCHEDULE 40 METALLIC PIPE [NFPA 54-12: TABLE 6.2(c)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2 psi
PRESSURE DROP: 3.0 in. w.c.
SPECIFIC GRAVITY: 0.60
INTENDED USE: INITIAL SUPPLY PRESSURE OF 8.0 IN. W.C. OR GREATER
NOMINAL
1
⁄2
3
⁄4
1
ACTUAL ID
0.622
0.824
1.049
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
454
312
250
214
190
172
158
147
138
131
116
105
96
90
80
72
66
62
58
55
52
50
47
46
44
42
41
40
39
38
36
34
33
31
30
29
28
27
27
26
949
652
524
448
397
360
331
308
289
273
242
219
202
188
166
151
139
129
121
114
109
104
99
95
92
89
86
83
81
79
75
71
68
65
63
61
59
57
56
54
1787
1228
986
844
748
678
624
580
544
514
456
413
380
353
313
284
261
243
228
215
204
195
187
179
173
167
162
157
152
148
141
134
128
123
119
115
111
108
105
102
LENGTH
(feet)
PIPE SIZE (inch)
11⁄4
11⁄2
2
21⁄2
3
4
1.380
1.610
2.067
2.469
3.068
4.026
3669
2522
2025
1733
1536
1392
1280
1191
1118
1056
936
848
780
726
643
583
536
499
468
442
420
400
384
368
355
343
332
322
312
304
289
275
264
253
244
236
228
221
215
209
5497
3778
3034
2597
2302
2085
1919
1785
1675
1582
1402
1270
1169
1087
964
873
803
747
701
662
629
600
575
552
532
514
497
482
468
455
432
412
395
379
366
353
342
331
322
313
10 588
7277
5844
5001
4433
4016
3695
3437
3225
3046
2700
2446
2251
2094
1856
1681
1547
1439
1350
1275
1211
1156
1107
1063
1024
989
957
928
901
877
833
794
761
731
704
680
658
638
619
602
16 875
11 598
9314
7971
7065
6401
5889
5479
5140
4856
4303
3899
3587
3337
2958
2680
2465
2294
2152
2033
1931
1842
1764
1695
1632
1576
1526
1479
1436
1397
1327
1266
1212
1165
1122
1083
1048
1017
987
960
29 832
20 503
16 465
14 092
12 489
11 316
10 411
9685
9087
8584
7608
6893
6342
5900
5229
4738
4359
4055
3804
3594
3413
3256
3118
2996
2886
2787
2697
2615
2539
2470
2346
2238
2143
2059
1983
1915
1854
1797
1745
1698
43 678
30 020
24 107
20 632
18 286
16 569
15 243
14 181
13 305
12 568
11 139
10 093
9285
8638
7656
6937
6382
5937
5570
5262
4997
4767
4565
4386
4225
4080
3949
3828
3718
3616
3435
3277
3138
3014
2904
2804
2714
2631
2555
2485
CAPACITY IN CUBIC FEET OF GAS PER HOUR
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column = 0.249
kPa
Note: Table entries are rounded to 3 significant digits.
192
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 1216.2(3)
SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.2(d)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2 psi
PRESSURE DROP: 6.0 in. w.c.
SPECIFIC GRAVITY: 0.60
INTENDED USE: INITIAL SUPPLY PRESSURE OF 8.0 IN. W.C. OR GREATER
NOMINAL
1
⁄2
3
⁄4
1
ACTUAL ID
0.622
0.824
1.049
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
660
454
364
312
276
250
230
214
201
190
168
153
140
131
116
105
96
90
84
80
76
72
69
66
64
62
60
58
56
55
52
50
47
46
44
42
41
40
39
38
1380
949
762
652
578
524
482
448
420
397
352
319
293
273
242
219
202
188
176
166
158
151
144
139
134
129
125
121
118
114
109
104
99
95
92
89
86
83
81
79
2600
1787
1435
1228
1089
986
907
844
792
748
663
601
553
514
456
413
380
353
332
313
297
284
272
261
252
243
235
228
221
215
204
195
187
179
173
167
162
157
152
148
LENGTH
(feet)
PIPE SIZE (inch)
11⁄4
11⁄2
2
21⁄2
3
4
1.380
1.610
2.067
2.469
3.068
4.026
5338
3669
2946
2522
2235
2025
1863
1733
1626
1536
1361
1234
1135
1056
936
848
780
726
681
643
611
583
558
536
516
499
483
468
454
442
420
400
384
368
355
343
332
322
312
304
7999
5497
4415
3778
3349
3034
2791
2597
2437
2302
2040
1848
1700
1582
1402
1270
1169
1087
1020
964
915
873
836
803
774
747
723
701
681
662
629
600
575
552
532
514
497
482
468
455
15 405
10 588
8502
7277
6449
5844
5376
5001
4693
4433
3928
3559
3275
3046
2700
2446
2251
2094
1965
1856
1762
1681
1610
1547
1490
1439
1393
1350
1311
1275
1211
1156
1107
1063
1024
989
957
928
901
877
24 553
16 875
13 551
11 598
10 279
9314
8568
7971
7479
7065
6261
5673
5219
4856
4303
3899
3587
3337
3131
2958
2809
2680
2566
2465
2375
2294
2220
2152
2090
2033
1931
1842
1764
1695
1632
1576
1526
1479
1436
1 397
43 405
29 832
23 956
20 503
18 172
16 465
15 147
14 092
13 222
12 489
11 069
10 029
9227
8584
7608
6893
6342
5900
5535
5229
4966
4738
4537
4359
4199
4055
3924
3804
3695
3594
3413
3256
3118
2996
2886
2787
2697
2615
2539
2 470
63 551
43 678
35 075
30 020
26 606
24 107
22 178
20 632
19 359
18 286
16 207
14 684
13 509
12 568
11 139
10 093
9285
8638
8105
7656
7271
6937
6643
6382
6148
5937
5745
5570
5410
5262
4997
4767
4565
4386
4225
4080
3949
3828
3718
3616
CAPACITY IN CUBIC FEET OF GAS PER HOUR
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column =
0.249 kPa
Note: Table entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
193
FUEL PIPING
TABLE 12-9 1216.2(4)
SCHEDULE 40 METALLIC PIPE [NFPA 54-12: TABLE 6.2(ce)]
GAS: NATURAL
INLET PRESSURE: 2.0 psi
PRESSURE DROP: 1.0 psi
NOMINAL:
1
⁄2
3
⁄4
1
ACTUAL ID:
0.622
0.824
1.049
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1510
1070
869
753
673
615
569
532
502
462
414
372
344
318
279
253
232
216
203
192
182
174
166
160
154
149
144
139
135
132
125
119
114
110
106
102
99
96
93
91
3040
2150
1760
1520
1360
1240
1150
1080
1010
934
836
751
695
642
583
528
486
452
424
401
381
363
348
334
322
311
301
292
283
275
262
250
239
230
221
214
207
200
195
189
5560
3930
3210
2780
2490
2270
2100
1970
1850
1710
1530
1370
1270
1170
1040
945
869
809
759
717
681
650
622
598
576
556
538
522
507
493
468
446
427
411
396
382
370
358
348
339
LENGTH
(feet.)
1 1 ⁄4
PIPE SIZE (inch)
1 1 ⁄2
SPECIFIC GRAVITY: 0.60
2
21⁄2
3
1.610
2.067
2.469
3.068
4.026
11 400
8070
6590
5710
5110
4660
4320
4040
3810
3510
3140
2820
2601
2410
2140
1940
1790
1660
1560
1470
1400
1330
1280
1230
1180
1140
1100
1070
1040
1010
960
917
878
843
812
784
759
736
715
695
17 100
12 100
9880
8550
7650
6980
6470
6050
5700
5260
4700
4220
3910
3610
3210
2910
2670
2490
2330
2210
2090
2000
1910
1840
1770
1710
1650
1600
1560
1520
1440
1370
1320
1260
1220
1180
1140
1100
1070
1040
32 900
23 300
19 000
16 500
14 700
13 500
12 500
11 700
11 000
10 100
9060
8130
7530
6960
6180
5600
5150
4790
4500
4250
4030
3850
3680
3540
3410
3290
3190
3090
3000
2920
2770
2640
2530
2430
2340
2260
2190
2120
2060
2010
52 500
37 100
30 300
26 300
23 500
21 400
19 900
18 600
17 500
16 100
14 400
13 000
12 000
11 100
9850
8920
8210
7640
7170
6770
6430
6130
5870
5640
5440
5250
5080
4930
4780
4650
4420
4220
4040
3880
3740
3610
3490
3390
3290
3200
92 800
65 600
53 600
46 400
41 500
37 900
35 100
32 800
30 900
28 500
25 500
22 900
21 200
19 600
17 400
15 800
14 500
13 500
12 700
12 000
11 400
10 800
10 400
9970
9610
9280
8980
8710
8460
8220
7810
7450
7140
6860
6600
6380
6170
5980
5810
5650
189 000
134 000
109 000
94 700
84 700
77 300
71 600
67 000
63 100
58,200
52 100
46 700
43 300
40 000
35 500
32 200
29 600
27 500
25 800
24 400
23 200
22 100
21 200
20 300
19 600
18 900
18 300
17 800
17 200
16 800
15 900
15 200
14 600
14 000
13 500
13 000
12 600
12 200
11 900
11 500
CAPACITY IN CUBIC FEET OF GAS PER HOUR
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa
Note: All tTable entries are rounded to 3 significant digits.
194
4
1.380
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-10 1216.2(5)
SCHEDULE 40 METALLIC PIPE [NFPA 54-12: TABLE 6.2(df)]
GAS: NATURAL
INLET PRESSURE: 3.0 psi
PRESSURE DROP: 2.0 psi
NOMINAL:
1
⁄2
3
⁄4
1
ACTUAL ID:
0.622
0.824
1.049
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2350
1620
1300
1110
985
892
821
764
717
677
600
544
500
465
412
374
344
320
300
283
269
257
246
236
228
220
213
206
200
195
185
177
169
162
156
151
146
142
138
134
4920
3380
2720
2320
2060
1870
1720
1600
1500
1420
1250
1140
1050
973
862
781
719
669
627
593
563
537
514
494
476
460
445
431
419
407
387
369
353
340
327
316
306
296
288
280
9270
6370
5110
4380
3880
3520
3230
3010
2820
2670
2360
2140
1970
1830
1620
1470
1350
1260
1180
1120
1060
1010
969
931
897
866
838
812
789
767
729
695
666
640
616
595
576
558
542
527
LENGTH
(feet.)
11⁄4
PIPE SIZE (inch)
1 1 ⁄2
SPECIFIC GRAVITY: 0.60
2
2 1 ⁄2
3
1.610
2.067
2.469
3.068
4.026
19 000
13 100
10 500
8990
7970
7220
6640
6180
5800
5470
4850
4400
4040
3760
3330
3020
2780
2590
2430
2290
2180
2080
1990
1910
1840
1780
1720
1670
1620
1580
1500
1430
1370
1310
1270
1220
1180
1150
1110
1080
28 500
19 600
15 700
13 500
11 900
10 800
9950
9260
8680
8200
7270
6590
6060
5640
5000
4530
4170
3870
3640
3430
3260
3110
2980
2860
2760
2660
2580
2500
2430
2360
2240
2140
2050
1970
1900
1830
1770
1720
1670
1620
54 900
37 700
30 300
25 900
23 000
20 800
19 200
17 800
16 700
15 800
14 000
12 700
11 700
10 900
9620
8720
8020
7460
7000
6610
6280
5990
5740
5510
5310
5130
4960
4810
4670
4550
4320
4120
3940
3790
3650
3530
3410
3310
3210
3120
87 500
60 100
48 300
41 300
36 600
33 200
30 500
28 400
26 700
25 200
22 300
20 200
18 600
17 300
15 300
13 900
12 800
11 900
11 200
10 500
10 000
9550
9150
8790
8470
8180
7910
7670
7450
7240
6890
6570
6290
6040
5820
5620
5440
5270
5120
4980
155 000
106 000
85 400
73 100
64 800
58 700
54 000
50 200
47 100
44 500
39 500
35 700
32 900
30 600
27 100
24 600
22 600
21 000
19 700
18 600
17 700
16 900
16 200
15 500
15 000
14 500
14 000
13 600
13 200
12 800
12 200
11 600
11 100
10 700
10 300
10 000
9610
9320
9050
8800
316 000
217 000
174 000
149 000
132 000
120 000
110 000
102000
96 100
90 800
80 500
72 900
67 100
62 400
55 300
50 100
46 100
42 900
40 200
38 000
36 100
34 400
33 000
31 700
30 500
29 500
28 500
27 700
26 900
26 100
24 800
23 700
22 700
21 800
21 000
20 300
19 600
19 000
18 400
18 000
CAPACITY IN CUBIC FEET OF GAS PER HOUR
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
4
1.380
195
FUEL PIPING
TABLE 12-11 1216.2(6)
SCHEDULE 40 METALLIC PIPE [NFPA 54-12: TABLE 6.2(eg)]
GAS: NATURAL
INLET PRESSURE: 5.0 psi
PRESSURE DROP: 3.5 psi
NOMINAL:
1
⁄2
ACTUAL ID:
0.622
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
3190
2250
1840
1590
1430
1300
1200
1150
1060
979
876
786
728
673
558
506
465
433
406
384
364
348
333
320
308
298
288
279
271
264
250
239
229
220
212
205
198
192
186
181
LENGTH
(feet.)
3
⁄4
0.824
6430
4550
3720
3220
2880
2630
2430
2330
2150
1980
1770
1590
1470
1360
1170
1060
973
905
849
802
762
727
696
669
644
622
602
584
567
551
524
500
478
460
443
428
414
401
390
379
1
1.049
11 800
8320
6790
5880
5260
4800
4450
4260
3920
3620
3240
2910
2690
2490
2200
1990
1830
1710
1600
1510
1440
1370
1310
1260
1210
1170
1130
1100
1070
1040
987
941
901
866
834
806
780
756
734
714
1 1 ⁄4
PIPE SIZE (inch)
1 1 ⁄2
SPECIFIC GRAVITY: 0.60
2
2 1 ⁄2
3
1.610
2.067
2.469
3.068
4.026
24 200
17 100
14 000
12 100
10 800
9860
9130
8540
8050
7430
6640
5960
5520
5100
4510
4090
3760
3500
3290
3100
2950
2810
2690
2590
2490
2410
2330
2260
2190
2130
2030
1930
1850
1780
1710
1650
1600
1550
1510
1470
36 200
25 600
20 900
18 100
16 200
14 800
13 700
12 800
12 100
11 100
9950
8940
8270
7650
6760
6130
5640
5250
4920
4650
4420
4210
4030
3880
3730
3610
3490
3380
3290
3200
3030
2900
2770
2660
2570
2480
2400
2330
2260
2200
69 700
49 300
40 300
34 900
31 200
28 500
26 400
24 700
23 200
21 400
19 200
17 200
15 900
14 700
13 000
11 800
10 900
10 100
9480
8950
8500
8110
7770
7460
7190
6940
6720
6520
6330
6150
5840
5580
5340
5130
4940
4770
4620
4480
4350
4230
111 000
78 600
64 200
55 600
49 700
45 400
42 000
39 300
37 000
34 200
30 600
27 400
25 400
23 500
20 800
18 800
17 300
16 100
15 100
14 300
13 600
12 900
12 400
11 900
11 500
11 100
10 700
10 400
10 100
9810
9320
8890
8510
8180
7880
7610
7360
7140
6930
6740
196 000
139 000
113 000
98 200
87 900
80 200
74 300
69 500
65 500
60 400
54 000
48 500
44 900
41 500
36 700
33 300
30 600
28 500
26 700
25 200
24 000
22 900
21 900
21 000
20 300
19 600
18 900
18 400
17 800
17 300
16 500
15 700
15 000
14 500
13 900
13 400
13 000
12 600
12 300
11 900
401 000
283 000
231 000
200 000
179 000
164 000
151 000
142 000
134 000
123 000
110 000
98 900
91 600
84 700
74 900
67 800
62 400
58 100
54 500
51 500
48 900
46 600
44 600
42 900
41 300
39 900
38 600
37 400
36 400
35 400
33 600
32 000
30 700
29 500
28 400
27 400
26 500
25 700
25 000
24 300
CAPACITY IN CUBIC FEET OF GAS PER HOUR
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa
Note: All tTable entries are rounded to 3 significant digits.
196
4
1.380
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-12 1216.2(7)
SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(fh)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2 psi
PRESSURE DROP: 0.3 in. w.c.
NOMINAL:
K & L:
ACR:
OUTSIDE:
INSIDE:*
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
3
⁄4
⁄8
0.375
0.305
20
14
11
10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
3
1
⁄8
⁄2
0.500
0.402
42
29
23
20
17
16
14
13
13
12
11
10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
1
5
⁄2
⁄8
0.625
0.527
85
58
47
40
35
32
29
27
26
24
22
20
18
17
15
13
12
11
11
10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
5
3
⁄8
⁄4
0.750
0.652
TUBE SIZE (inch)
3
7
⁄4
⁄8
0.875
0.745
SPECIFIC GRAVITY: 0.60
1
11⁄4
11⁄2
2
1.125
1.375
1.625
2.125
1270
873
701
600
532
482
443
413
387
366
324
294
270
251
223
202
186
173
162
153
145
139
133
128
123
119
115
111
108
105
100
95
91
88
84
82
79
77
74
72
2650
1820
1460
1250
1110
1000
924
859
806
761
675
612
563
523
464
420
387
360
338
319
303
289
277
266
256
247
239
232
225
219
208
199
190
183
176
170
164
159
155
151
1 ⁄8
1
0.995
1 ⁄8
3
1.245
CAPACITY IN CUBIC FEET OF GAS PER HOUR
148
102
82
70
62
56
52
48
45
43
38
34
31
29
26
23
22
20
19
18
17
16
15
15
14
14
13
13
13
12
12
11
11
10
NA
NA
NA
NA
NA
NA
210
144
116
99
88
79
73
68
64
60
53
48
45
41
37
33
31
28
27
25
24
23
22
21
20
20
19
18
18
17
16
16
15
14
14
13
13
13
12
12
448
308
247
211
187
170
156
145
136
129
114
103
95
89
78
71
65
61
57
54
51
49
47
45
43
42
40
39
38
37
35
34
32
31
30
29
28
27
26
25
806
554
445
381
337
306
281
262
245
232
206
186
171
159
141
128
118
110
103
97
92
88
84
81
78
75
73
71
69
67
63
60
58
56
54
52
50
49
47
46
–
1.481
–
1.959
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column =
0.249 kPa
*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
Notes:
(1) All tTable entries are rounded to 3 significant digits.
(2) NA means a flow of less than 10 cfh ft3/h (0.08 L/s).
UNIFORM PLUMBING CODE
197
FUEL PIPING
TABLE 12-13 1216.2(8)
SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(gi)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2 psi
PRESSURE DROP: 0.5 in. w.c.
NOMINAL:
K & L:
ACR:
OUTSIDE:
INSIDE:*
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
3
⁄4
⁄8
0.375
0.305
27
18
15
13
11
10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
3
1
⁄8
⁄2
0.500
0.402
55
38
30
26
23
21
19
18
17
16
14
13
12
11
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
1
5
⁄2
⁄8
0.625
0.527
111
77
61
53
47
42
39
36
34
32
28
26
24
22
20
18
16
15
14
13
13
12
12
11
11
10
10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
5
3
⁄8
⁄4
0.750
0.652
TUBE SIZE (inch)
3
7
⁄4
⁄8
0.875
0.745
SPECIFIC GRAVITY: 0.60
1
11⁄4
11⁄2
2
1.125
1.375
1.625
2.125
1 ⁄8
1
0.995
1 ⁄8
3
1.245
CAPACITY IN CUBIC FEET OF GAS PER HOUR
195
134
107
92
82
74
68
63
59
56
50
45
41
39
34
31
28
26
25
23
22
21
20
20
19
18
18
17
17
16
15
15
14
13
13
13
12
12
11
11
276
190
152
131
116
105
96
90
84
79
70
64
59
55
48
44
40
38
35
33
32
30
29
28
27
26
25
24
24
23
22
21
20
19
18
18
17
17
16
16
590
406
326
279
247
224
206
192
180
170
151
136
125
117
103
94
86
80
75
71
68
64
62
59
57
55
53
52
50
49
46
44
42
41
39
38
37
36
35
34
1060
730
586
502
445
403
371
345
324
306
271
245
226
210
186
169
155
144
135
128
122
116
111
107
103
99
96
93
90
88
84
80
76
73
71
68
66
64
62
60
–
1.481
1680
1150
925
791
701
635
585
544
510
482
427
387
356
331
294
266
245
228
214
202
192
183
175
168
162
156
151
147
143
139
132
126
120
116
111
108
104
101
98
95
–
1.959
3490
2400
1930
1650
1460
1320
1220
1130
1060
1000
890
806
742
690
612
554
510
474
445
420
399
381
365
350
338
326
315
306
297
289
274
262
251
241
232
224
217
210
204
199
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column =
0.249 kPa
*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
Notes:
(1) All tTable entries are rounded to 3 significant digits.
(2) NA means a flow of less than 10 cfh ft3/h (0.08 L/s).
198
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-14 1216.2(9)
SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.2(hj)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2 psi
PRESSURE DROP: 1.0 in. w.c.
SPECIFIC GRAVITY: 0.60
INTENDED USE: TUBE SIZING BETWEEN HOUSE LINE REGULATOR AND THE APPLIANCE.
NOMINAL:
K & L:
ACR:
OUTSIDE:
INSIDE:*
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
3
⁄4
⁄8
0.375
0.305
39
27
21
18
16
15
13
13
12
11
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
3
1
⁄8
⁄2
0.500
0.402
80
55
44
38
33
30
28
26
24
23
20
18
17
16
14
13
12
11
10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
1
5
⁄2
⁄8
0.625
0.527
162
111
89
77
68
61
57
53
49
47
41
37
34
32
28
26
24
22
21
20
19
18
17
16
16
15
15
14
14
13
13
12
12
11
11
10
10
NA
NA
NA
TUBE SIZE (inch)
5
3
⁄8
⁄4
0.750
0.652
3
7
⁄4
⁄8
0.875
0.745
1
11⁄4
1 1 ⁄2
2
1.125
1.375
1.625
2.125
2440
1680
1350
1150
1020
925
851
791
742
701
622
563
518
482
427
387
356
331
311
294
279
266
255
245
236
228
220
214
207
202
192
183
175
168
162
156
151
147
143
139
5080
3490
2800
2400
2130
1930
1770
1650
1550
1460
1290
1170
1080
1000
890
806
742
690
647
612
581
554
531
510
491
474
459
445
432
420
399
381
365
350
338
326
315
306
297
289
1 ⁄8
1
0.995
1 ⁄8
3
1.245
CAPACITY IN CUBIC FEET OF GAS PER HOUR
283
195
156
134
119
107
99
92
86
82
72
65
60
56
50
45
41
39
36
34
32
31
30
28
27
26
26
25
24
23
22
21
20
20
19
18
18
17
17
16
402
276
222
190
168
152
140
131
122
116
103
93
85
79
70
64
59
55
51
48
46
44
42
40
39
38
36
35
34
33
32
30
29
28
27
26
25
24
24
23
859
590
474
406
359
326
300
279
262
247
219
198
183
170
151
136
125
117
110
103
98
94
90
86
83
80
78
75
73
71
68
64
62
59
57
55
53
52
50
49
1550
1060
853
730
647
586
539
502
471
445
394
357
329
306
271
245
226
210
197
186
177
169
162
155
150
144
140
135
132
128
122
116
111
107
103
99
96
93
90
88
–
1.481
–
1.959
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column =
0.249 kPa
*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
Notes:
(1) All tTable entries are rounded to 3 significant digits.
(2) NA means a flow of less than 10 cfh ft3/h (0.08 L/s).
UNIFORM PLUMBING CODE
199
FUEL PIPING
TABLE 12-15 1216.2(10)
SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(ik)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2 psi
PRESSURE DROP: 17.0 in. w.c.
NOMINAL:
K & L:
ACR:
OUTSIDE:
INSIDE:*
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
3
⁄4
⁄8
0.375
0.305
190
130
105
90
79
72
66
62
58
55
48
44
40
38
33
30
28
26
24
23
22
21
20
19
18
18
17
17
16
16
15
14
14
13
13
12
12
11
11
11
3
1
⁄8
⁄2
0.500
0.402
391
269
216
185
164
148
137
127
119
113
100
90
83
77
69
62
57
53
50
47
45
43
41
39
38
37
35
34
33
32
31
29
28
27
26
25
24
24
23
22
1
5
⁄2
⁄8
0.625
0.527
796
547
439
376
333
302
278
258
243
229
203
184
169
157
140
126
116
108
102
96
91
87
83
80
77
74
72
70
68
66
63
60
57
55
53
51
49
48
47
45
5
3
⁄8
⁄4
0.750
0.652
TUBE SIZE (inch)
3
7
⁄4
⁄8
0.875
0.745
SPECIFIC GRAVITY: 0.60
1
1 1 ⁄4
11⁄2
2
1.125
1.375
1.625
2.125
12 000
8230
6610
5650
5010
4540
4180
3890
3650
3440
3050
2770
2540
2370
2100
1900
1750
1630
1530
1440
1370
1310
1250
1200
1160
1120
1080
1050
1020
991
941
898
860
826
796
768
744
721
700
681
24 900
17 100
13 800
11 800
10 400
9460
8700
8090
7590
7170
6360
5760
5300
4930
4370
3960
3640
3390
3180
3000
2850
2720
2610
2500
2410
2330
2250
2180
2120
2060
1960
1870
1790
1720
1660
1600
1550
1500
1460
1420
1 ⁄8
1
0.995
1 ⁄8
3
1.245
CAPACITY IN CUBIC FEET OF GAS PER HOUR
1390
956
768
657
582
528
486
452
424
400
355
321
296
275
244
221
203
189
177
168
159
152
145
140
135
130
126
122
118
115
109
104
100
96
93
89
86
84
81
79
1970
1360
1090
932
826
749
689
641
601
568
503
456
420
390
346
313
288
268
252
238
226
215
206
198
191
184
178
173
168
163
155
148
142
136
131
127
123
119
115
112
4220
2900
2330
1990
1770
1600
1470
1370
1280
1210
1080
974
896
834
739
670
616
573
538
508
482
460
441
423
408
394
381
370
359
349
332
316
303
291
280
271
262
254
247
240
7590
5220
4190
3590
3180
2880
2650
2460
2310
2180
1940
1750
1610
1500
1330
1210
1110
1030
968
914
868
829
793
762
734
709
686
665
646
628
597
569
545
524
505
487
472
457
444
432
–
1.481
–
1.959
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column =
0.249 kPa
*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
Note: All tTable entries are rounded to 3 significant digits.
200
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-16 1216.2(11)
SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(jl)]
GAS: NATURAL
INLET PRESSURE: 2.0 psi
PRESSURE DROP: 1.0 psi
NOMINAL:
K & L:
ACR:
OUTSIDE:
INSIDE:*
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
3
⁄4
⁄8
0.375
0.305
245
169
135
116
103
93
86
80
75
71
63
57
52
49
43
39
36
33
31
30
28
27
26
25
24
23
22
22
21
20
19
18
18
17
16
16
15
15
14
14
3
1
⁄8
⁄2
0.500
0.402
506
348
279
239
212
192
177
164
154
146
129
117
108
100
89
80
74
69
65
61
58
55
53
51
49
47
46
44
43
42
40
38
36
35
34
33
31
30
30
29
1
5
⁄2
⁄8
0.625
0.527
1030
708
568
486
431
391
359
334
314
296
263
238
219
204
181
164
150
140
131
124
118
112
108
103
100
96
93
90
88
85
81
77
74
71
68
66
64
62
60
59
5
3
⁄8
⁄4
0.750
0.652
TUBE SIZE (inch)
3
7
⁄4
⁄8
0.875
0.745
SPECIFIC GRAVITY: 0.60
1
11⁄4
11⁄2
2
1.125
1.375
1.625
2.125
1 ⁄8
1
0.995
1 ⁄8
3
1.245
CAPACITY IN CUBIC FEET OF GAS PER HOUR
1800
1240
993
850
754
683
628
584
548
518
459
416
383
356
315
286
263
245
230
217
206
196
188
181
174
168
163
158
153
149
142
135
129
124
120
116
112
108
105
102
2550
1760
1410
1210
1070
969
891
829
778
735
651
590
543
505
448
406
373
347
326
308
292
279
267
256
247
239
231
224
217
211
201
192
183
176
170
164
159
154
149
145
5450
3750
3010
2580
2280
2070
1900
1770
1660
1570
1390
1260
1160
1080
956
866
797
741
696
657
624
595
570
548
528
510
493
478
464
452
429
409
392
376
363
350
339
329
319
310
9820
6750
5420
4640
4110
3730
3430
3190
2990
2830
2500
2270
2090
1940
1720
1560
1430
1330
1250
1180
1120
1070
1030
986
950
917
888
861
836
813
772
737
705
678
653
630
610
592
575
559
–
1.481
15 500
10 600
8550
7310
6480
5870
5400
5030
4720
4450
3950
3580
3290
3060
2710
2460
2260
2100
1970
1870
1770
1690
1620
1550
1500
1450
1400
1360
1320
1280
1220
1160
1110
1070
1030
994
962
933
906
881
–
1.959
32 200
22 200
17 800
15 200
13 500
12 200
11 300
10 500
9820
9280
8220
7450
6850
6380
5650
5120
4710
4380
4110
3880
3690
3520
3370
3240
3120
3010
2920
2830
2740
2670
2540
2420
2320
2230
2140
2070
2000
1940
1890
1830
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa
*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
201
FUEL PIPING
TABLE 12-17 1216.2(12)
SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.2(km)]
GAS: NATURAL
INLET PRESSURE: 2.0 psi
PRESSURE DROP: 1.5 psi
SPECIFIC GRAVITY: 0.60
INTENDED USE: PIPE SIZING BETWEEN POINT OF DELIVERY AND THE HOUSE LINE REGULATOR. TOTAL LOAD SUPPLIED BY A
SINGLE HOUSE LINE REGULATOR NOT EXCEEDING 150 CUBIC FEET PER HOUR.†2
NOMINAL:
K & L:
ACR:
OUTSIDE:
INSIDE:*1
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
3
⁄4
⁄8
3
1
⁄8
1
⁄2
0.375
0.500
303
208
167
143
127
115
106
98
92
87
77
70
64
60
53
48
44
41
39
36
35
33
32
30
29
28
27
27
26
25
24
23
22
21
20
19
19
18
18
17
625
430
345
295
262
237
218
203
190
180
159
144
133
124
110
99
91
85
80
75
72
68
65
63
60
58
57
55
53
52
49
47
45
43
42
40
39
38
37
36
0.305
0.402
5
⁄2
⁄8
0.625
0.527
TUBE SIZE (inch)
5
3
⁄8
⁄4
0.750
0.652
3
7
⁄4
⁄8
0.875
0.745
CAPACITY IN CUBIC FEET OF GAS PER HOUR
1270
874
702
601
532
482
444
413
387
366
324
294
270
252
223
202
186
173
162
153
146
139
133
128
123
119
115
111
108
105
100
95
91
88
85
82
79
77
74
72
2220
1530
1230
1050
931
843
776
722
677
640
567
514
472
440
390
353
325
302
283
268
254
243
232
223
215
208
201
195
189
184
175
167
160
153
148
143
138
134
130
126
3150
2170
1740
1490
1320
1200
1100
1020
961
907
804
729
670
624
553
501
461
429
402
380
361
344
330
317
305
295
285
276
268
261
248
237
227
218
210
202
196
190
184
179
1
11⁄4
11⁄2
2
1.125
1.375
1.625
2.125
6740
4630
3720
3180
2820
2560
2350
2190
2050
1940
1720
1560
1430
1330
1180
1070
984
916
859
811
771
735
704
676
652
629
609
590
573
558
530
505
484
465
448
432
419
406
394
383
12 100
8330
6690
5730
5080
4600
4230
3940
3690
3490
3090
2800
2580
2400
2130
1930
1770
1650
1550
1460
1390
1320
1270
1220
1170
1130
1100
1060
1030
1000
954
910
871
837
806
779
753
731
709
690
19 100
13 100
10 600
9030
8000
7250
6670
6210
5820
5500
4880
4420
4060
3780
3350
3040
2790
2600
2440
2300
2190
2090
2000
1920
1850
1790
1730
1680
1630
1580
1500
1430
1370
1320
1270
1230
1190
1150
1120
1090
11⁄8
0.995
13⁄8
1.245
–
1.481
–
1.959
39 800
27 400
22 000
18 800
16 700
15 100
13 900
12 900
12 100
11 500
10 200
9200
8460
7870
6980
6320
5820
5410
5080
4800
4560
4350
4160
4000
3850
3720
3600
3490
3390
3300
3130
2990
2860
2750
2650
2560
2470
2400
2330
2270
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa
*1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
†2 When Where this table is used to size the tubing upstream of a line pressure regulator, the pipe or tubing downstream of the line pressure regulator shall be
sized using a pressure drop no greater than 1 in. w.c. inch water column (0.249 kPa)
Note: All tTable entries are rounded to 3 significant digits.
202
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-18 1216.2(13)
SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(ln)]
GAS: NATURAL
INLET PRESSURE: 5.0 psi
PRESSURE DROP: 3.5 psi
NOMINAL:
K & L:
ACR:
OUTSIDE:
INSIDE:*
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
3
⁄4
⁄8
0.375
0.305
511
351
282
241
214
194
178
166
156
147
130
118
109
101
90
81
75
69
65
62
58
56
53
51
49
48
46
45
43
42
40
38
37
35
34
33
32
31
30
29
3
1
⁄8
⁄2
0.500
0.402
1050
724
582
498
441
400
368
342
321
303
269
243
224
208
185
167
154
143
134
127
121
115
110
106
102
98
95
92
90
87
83
79
76
73
70
68
65
63
62
60
1
5
⁄2
⁄8
0.625
0.527
2140
1470
1180
1010
898
813
748
696
653
617
547
495
456
424
376
340
313
291
273
258
245
234
224
215
207
200
194
188
182
177
169
161
154
148
143
138
133
129
125
122
5
3
⁄8
⁄4
0.750
0.652
TUBE SIZE (inch)
3
7
⁄4
⁄8
0.875
0.745
SPECIFIC GRAVITY: 0.60
1
11⁄4
11⁄2
2
1.125
1.375
1.625
2.125
32 200
22 200
17 800
15 200
13 500
12 200
11 200
10 500
9820
9270
8220
7450
6850
6370
5650
5120
4710
4380
4110
3880
3690
3520
3370
3240
3120
3010
2910
2820
2740
2670
2530
2420
2320
2220
2140
2070
2000
1940
1890
1830
67 100
46 100
37 000
31 700
28 100
25 500
23 400
21 800
20 400
19 300
17 100
15 500
14 300
13 300
11 800
10 700
9810
9120
8560
8090
7680
7330
7020
6740
6490
6270
6070
5880
5710
5560
5280
5040
4820
4630
4460
4310
4170
4040
3930
3820
1 ⁄8
1
0.995
1 ⁄8
3
1.245
CAPACITY IN CUBIC FEET OF GAS PER HOUR
3750
2580
2070
1770
1570
1420
1310
1220
1140
1080
955
866
796
741
657
595
547
509
478
451
429
409
392
376
362
350
339
328
319
310
295
281
269
259
249
241
233
226
219
213
5320
3650
2930
2510
2230
2020
1860
1730
1620
1530
1360
1230
1130
1050
932
844
777
722
678
640
608
580
556
534
514
497
481
466
452
440
418
399
382
367
353
341
330
320
311
302
11 400
7800
6270
5360
4750
4310
3960
3690
3460
3270
2900
2620
2410
2250
1990
1800
1660
1540
1450
1370
1300
1240
1190
1140
1100
1060
1030
1000
967
940
893
852
816
784
755
729
705
684
664
646
20 400
14 000
11 300
9660
8560
7750
7130
6640
6230
5880
5210
4720
4350
4040
3580
3250
2990
2780
2610
2460
2340
2230
2140
2050
1980
1910
1850
1790
1740
1690
1610
1530
1470
1410
1360
1310
1270
1230
1200
1160
–
1.481
–
1.959
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa
*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
203
FUEL PIPING
TABLE 12-19 1216.2(14)
CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-12: TABLE 6.2(mo)]
FLOW DESIGNATION:
LENGTH (feet)
5
10
15
20
25
30
40
50
60
70
80
90
100
150
200
250
300
13
46
32
25
22
19
18
15
13
12
11
10
10
9
7
6
5
5
15
63
44
35
31
27
25
21
19
17
16
15
14
13
10
9
8
7
18
115
82
66
58
52
47
41
37
34
31
29
28
26
20
18
16
15
19
134
95
77
67
60
55
47
42
38
36
33
32
30
23
21
19
17
23
225
161
132
116
104
96
83
75
68
63
60
57
54
42
38
34
32
GAS:
INLET PRESSURE:
PRESSURE DROP:
SPECIFIC GRAVITY:
TUBE SIZE (EHD)*
25
30
31
37
39
46
CAPACITY IN CUBIC FEET OF GAS PER HOUR
270
192
157
137
122
112
97
87
80
74
69
65
62
48
44
39
36
471
330
267
231
206
188
162
144
131
121
113
107
101
78
71
63
57
546
383
310
269
240
218
188
168
153
141
132
125
118
91
82
74
67
895
639
524
456
409
374
325
292
267
248
232
219
208
171
148
133
95
1037
746
615
536
482
442
386
347
318
295
277
262
249
205
179
161
148
1790
1260
1030
888
793
723
625
559
509
471
440
415
393
320
277
247
226
48
2070
1470
1200
1050
936
856
742
665
608
563
527
498
472
387
336
301
275
NATURAL
LESS THAN 2 psi
0.5 in. w.c.
0.60
60
3660
2600
2140
1850
1660
1520
1320
1180
1080
1000
940
887
843
691
600
538
492
62
4140
2930
2400
2080
1860
1700
1470
1320
1200
1110
1040
983
933
762
661
591
540
For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column = 0.249 kPa
*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the
greater the gas capacity of the tubing.
Notes:
(1) Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, and/or fittings, or both shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings, and/or bends, or both.
(2) All tTable entries are rounded to 3 significant digits.
204
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-20 1216.2(15)
CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-12: TABLE 6.2(np)]
GAS:
INLET PRESSURE:
PRESSURE DROP:
SPECIFIC GRAVITY:
INTENDED USE: INITIAL SUPPLY PRESSURE OF 8.0 INCH WATER COLUMN OR GREATER.
FLOW DESIGNATION:
LENGTH (feet)
5
10
15
20
25
30
40
50
60
70
80
90
100
150
200
250
300
13
120
83
67
57
51
46
39
35
32
29
27
26
24
19
17
15
13
15
160
112
90
78
69
63
54
48
44
41
38
36
34
27
23
21
19
18
277
197
161
140
125
115
100
89
82
76
71
67
63
52
45
40
37
19
327
231
189
164
147
134
116
104
95
88
82
77
73
60
52
46
42
23
TUBE SIZE (EHD)*
25
30
31
37
46
CAPACITY IN CUBIC FEET OF GAS PER HOUR
529
380
313
273
245
225
196
176
161
150
141
133
126
104
91
82
75
649
462
379
329
295
270
234
210
192
178
167
157
149
122
106
95
87
1180
828
673
580
518
471
407
363
330
306
285
268
254
206
178
159
144
1370
958
778
672
599
546
471
421
383
355
331
311
295
240
207
184
168
2140
1530
1250
1090
978
895
778
698
639
593
555
524
498
409
355
319
234
4430
3200
2540
2200
1960
1790
1550
1380
1260
1170
1090
1030
974
793
686
613
559
48
5010
3560
2910
2530
2270
2070
1800
1610
1470
1360
1280
1200
1140
936
812
728
665
NATURAL
LESS THAN 2 psi
3.0 in. w.c.
0.60
60
8800
6270
5140
4460
4000
3660
3180
2850
2600
2420
2260
2140
2030
1660
1440
1290
1180
62
10 100
7160
5850
5070
4540
4140
3590
3210
2930
2720
2540
2400
2280
1860
1610
1440
1320
For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column = 0.249 kPa
*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the
greater the gas capacity of the tubing.
Notes:
(1) Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, and/or fittings, or both shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings, and/or bends, or both.
(2) All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
205
FUEL PIPING
TABLE 12-21 1216.2(16)
CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-12: TABLE 6.2(oq)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2 psi
PRESSURE DROP: 6.0 in. w.c.
SPECIFIC GRAVITY: 0.60
INTENDED USE: INITIAL SUPPLY PRESSURE OF 11.0 INCH WATER COLUMN OR GREATER.
FLOW DESIGNATION:
LENGTH (feet)
5
10
15
20
25
30
40
50
60
70
80
90
100
150
200
250
300
13
173
120
96
83
74
67
57
51
46
42
39
37
35
28
24
21
19
15
229
160
130
112
99
90
78
69
63
58
54
51
48
39
34
30
27
18
389
277
227
197
176
161
140
125
115
106
100
94
89
73
63
57
52
19
461
327
267
231
207
189
164
147
134
124
116
109
104
85
73
66
60
23
25
TUBE SIZE (EHD)*
30
31
37
46
CAPACITY IN CUBIC FEET OF GAS PER HOUR
737
529
436
380
342
313
273
245
225
209
196
185
176
145
126
114
104
911
649
532
462
414
379
329
295
270
250
234
221
210
172
149
134
122
1690
1180
960
828
739
673
580
518
471
435
407
383
363
294
254
226
206
1950
1370
1110
958
855
778
672
599
546
505
471
444
421
342
295
263
240
3000
2140
1760
1530
1370
1250
1090
978
895
830
778
735
698
573
498
447
409
6280
4430
3610
3120
2790
2540
2200
1960
1790
1660
1550
1460
1380
1130
974
870
793
48
7050
5010
4100
3560
3190
2910
2530
2270
2070
1920
1800
1700
1610
1320
1140
1020
936
60
12 400
8800
7210
6270
5620
5140
4460
4000
3660
3390
3180
3000
2850
2340
2030
1820
1660
62
14 260
10 100
8260
7160
6400
5850
5070
4540
4140
3840
3590
3390
3210
2630
2280
2040
1860
For SI units: 1 foot = 304.8 mm 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column = 0.249 kPa
*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD,
the greater the gas capacity of the tubing.
Notes:
(1) Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, and/or fittings, or both shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional
fittings, and/or bends, or both.
(2) All tTable entries are rounded to 3 significant digits.
206
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-22 1216.2(17)
CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-12: TABLE 6.2(pr)]
FLOW DESIGNATION:
LENGTH (feet)
10
25
30
40
50
75
80
100
150
200
250
300
400
500
13
270
166
151
129
115
93
89
79
64
55
49
44
38
34
15
353
220
200
172
154
124
120
107
87
75
67
61
52
46
18
587
374
342
297
266
218
211
189
155
135
121
110
96
86
19
700
444
405
351
314
257
249
222
182
157
141
129
111
100
23
1100
709
650
567
510
420
407
366
302
263
236
217
189
170
GAS:
INLET PRESSURE:
PRESSURE DROP:
SPECIFIC GRAVITY:
TUBE SIZE (EHD)*
25
30
31
37
39
46
CAPACITY IN CUBIC FEET OF GAS PER HOUR
1370
876
801
696
624
512
496
445
364
317
284
260
225
202
2590
1620
1480
1270
1140
922
892
795
646
557
497
453
390
348
2990
1870
1700
1470
1310
1070
1030
920
748
645
576
525
453
404
4510
2890
2640
2300
2060
1690
1640
1470
1210
1050
941
862
749
552
5037
3258
2987
2605
2343
1932
1874
1685
1389
1212
1090
999
871
783
9600
6040
5510
4760
4260
3470
3360
3000
2440
2110
1890
1720
1490
1330
48
10 700
6780
6200
5380
4820
3950
3820
3420
2800
2430
2180
1990
1730
1550
NATURAL
2.0 psi
1.0 psi
0.60
60
18 600
11 900
10 900
9440
8470
6940
6730
6030
4940
4290
3850
3520
3060
2740
62
21 600
13 700
12 500
10 900
9720
7940
7690
6880
5620
4870
4360
3980
3450
3090
For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa
*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the
greater the gas capacity of the tubing.
Notes:
(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 3⁄4 0.75 psi (5.17 kPa), do not use this table. Consult with
regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may vary are capable of varying with flow rate.
(2) CAUTION: Capacities shown in table may exceed are capable of exceeding the maximum capacity for a selected regulator. Consult with regulator or tubing
manufacturer for guidance.
(3) Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, and/or fittings, or both shall be increased
by an equivalent length of tubing according to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings, and/or bends, or both.
(4) All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
207
FUEL PIPING
TABLE 12-23 1216.2(18)
CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-12: TABLE 6.2(qs)]
FLOW DESIGNATION:
LENGTH (feet)
13
15
18
19
23
10
25
30
40
50
523
322
292
251
223
674
420
382
329
293
1080
691
632
549
492
1300
827
755
654
586
2000
1290
1180
1030
926
250
300
400
500
95
86
74
66
128
116
100
89
223
204
177
159
263
240
208
186
430
394
343
309
75
80
100
150
200
180
174
154
124
107
238
230
205
166
143
403
391
350
287
249
479
463
415
339
294
763
740
665
548
478
TUBE SIZE (EHD)*
25
30
31
37
39
CAPACITY IN CUBIC FEET OF GAS PER HOUR
GAS:
INLET PRESSURE:
PRESSURE DROP:
SPECIFIC GRAVITY:
46
2530
1620
1480
1280
1150
4920
3080
2800
2420
2160
5660
3540
3230
2790
2490
8300
5310
4860
4230
3790
9140 18 100
5911 11 400
5420 10400
4727
8970
4251
8020
524
479
416
373
945
860
742
662
1090
995
858
766
1730
1590
1380
1040
1977
1813
1581
1422
944
915
820
672
584
1750
1690
1510
1230
1060
2020
1960
1740
1420
1220
3110
3020
2710
2220
1930
3506
3400
3057
2521
2199
6530
6320
5650
4600
3980
3550
3240
2800
2500
48
NATURAL
5.0 psi
3.5 psi
0.60
60
62
19 800
12 600
11 500
10 000
8930
34 400
22 000
20 100
17 400
15 600
40 400
25 600
23 400
20 200
18 100
4040
3690
3210
2870
7110
6500
5650
5060
8140
7430
6440
5760
7320
7090
6350
5200
4510
12 800
12 400
11 100
9130
7930
14 800
14 300
12 800
10 500
9090
For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa
*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the
greater the gas capacity of the tubing.
Notes:
(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1 psi (6.89 kPa), do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across regulator may vary are capable of varying with the flow rate.
(2) CAUTION: Capacities shown in table may exceed are capable of exceeding the maximum capacity of selected regulator. Consult tubing manufacturer for guidance.
(3) Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, and/or fittings, or both shall be increased
by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings, and/or
bends, or both.
(4) All tTable entries are rounded to 3 significant digits.
208
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-24 1216.2(19)
POLYETHYLENE PLASTIC PIPE [NFPA 54-12: TABLE 6.2(rt)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2 psi
PRESSURE DROP: 0.3 in. w.c.
NOMINAL OD:
DESIGNATION:
ACTUAL ID:
LENGTH (feet)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
1
⁄2
SDR 9.33
0.660
153
105
84
72
64
58
53
50
46
44
39
35
32
30
27
24
22
21
19
18
3
⁄4
SDR 11.00
0.860
305
210
169
144
128
116
107
99
93
88
78
71
65
60
54
48
45
42
39
37
PIPE SIZE (inch)
1
SDR 11.00
1.077
551
379
304
260
231
209
192
179
168
159
141
127
117
109
97
88
81
75
70
66
11⁄4
SDR 10.00
1.328
11⁄2
SPECIFIC GRAVITY: 0.60
SDR 11.00
1.554
2
SDR 11.00
1.943
CAPACITY IN CUBIC FEET OF GAS PER HOUR
955
656
527
451
400
362
333
310
291
275
243
221
203
189
167
152
139
130
122
115
1440
991
796
681
604
547
503
468
439
415
368
333
306
285
253
229
211
196
184
174
2590
1780
1430
1220
1080
983
904
841
789
745
661
598
551
512
454
411
378
352
330
312
3
4
SDR 11
SDR 11
7170
4920
3950
3380
3000
2720
2500
2330
2180
2060
1830
1660
1520
1420
1260
1140
1050
974
914
863
13 900
9520
7640
6540
5800
5250
4830
4500
4220
3990
3530
3200
2940
2740
2430
2200
2020
1880
1770
1670
2.864
3.682
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column = 0.249 kPa
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
209
FUEL PIPING
TABLE 12-25 1216.2(20)
POLYETHYLENE PLASTIC PIPE [NFPA 54-12: TABLE 6.2(su)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2 psi
PRESSURE DROP: 0.5 in. w.c.
NOMINAL OD:
DESIGNATION:
ACTUAL ID:
LENGTH (feet)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
1
⁄2
SDR 9.33
0.660
201
138
111
95
84
76
70
65
61
58
51
46
43
40
35
32
29
27
26
24
3
⁄4
SDR 11.00
0.860
403
277
222
190
169
153
140
131
123
116
103
93
86
80
71
64
59
55
51
48
PIPE SIZE (inch)
1
SDR 11.00
1.077
11⁄4
SDR 10.00
1.328
SPECIFIC GRAVITY: 0.60
11⁄2
SDR 11.00
1.554
2
SDR 11.00
1.943
CAPACITY IN CUBIC FEET OF GAS PER HOUR
726
499
401
343
304
276
254
236
221
209
185
168
154
144
127
115
106
99
93
88
1260
865
695
594
527
477
439
409
383
362
321
291
268
249
221
200
184
171
160
152
1900
1310
1050
898
796
721
663
617
579
547
485
439
404
376
333
302
278
258
242
229
3410
2350
1880
1610
1430
1300
1190
1110
1040
983
871
789
726
675
598
542
499
464
435
411
3
SDR 11
2.864
9450
6490
5210
4460
3950
3580
3300
3070
2880
2720
2410
2180
2010
1870
1660
1500
1380
1280
1200
1140
4
SDR 11
3.682
18 260
12 550
10 080
8630
7640
6930
6370
5930
5560
5250
4660
4220
3880
3610
3200
2900
2670
2480
2330
2200
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column = 0.249 kPa
Note: All tTable entries are rounded to 3 significant digits.
210
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-26 1216.2(21)
POLYETHYLENE PLASTIC PIPE [NFPA 54-12: TABLE 6.2(tv)]
GAS: NATURAL
INLET PRESSURE: 2.0 psi
PRESSURE DROP: 1.0 psi
NOMINAL OD:
DESIGNATION:
ACTUAL ID:
LENGTH (feet)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
⁄2
SDR 9.33
0.660
1860
1280
1030
878
778
705
649
603
566
535
474
429
395
368
326
295
272
253
237
224
213
203
194
187
180
174
168
163
158
154
146
139
134
128
124
119
115
112
109
106
3
⁄4
SDR 11.00
0.860
3720
2560
2050
1760
1560
410
1300
1210
1130
1070
949
860
791
736
652
591
544
506
475
448
426
406
389
374
360
348
336
326
317
308
293
279
267
257
247
239
231
224
218
212
PIPE SIZE (inch)
1
SDR 11.00
1.077
11⁄4
SDR 10.00
1.328
1 1 ⁄2
SDR 11.00
1.554
SPECIFIC GRAVITY: 0.60
2
SDR 11.00
1.943
CAPACITY IN CUBIC FEET OF GAS PER HOUR
6710
4610
3710
3170
2810
2550
2340
2180
2050
1930
1710
1550
1430
1330
1180
1070
981
913
856
809
768
733
702
674
649
627
607
588
572
556
528
504
482
463
446
431
417
404
393
382
11 600
7990
6420
5490
4870
4410
4060
3780
3540
3350
2970
2690
2470
2300
2040
1850
1700
1580
1480
1400
1330
1270
1220
1170
1130
1090
1050
1020
990
963
915
873
836
803
773
747
723
701
680
662
17 600
12 100
9690
8300
7350
6660
6130
5700
5350
5050
4480
4060
3730
3470
3080
2790
2570
2390
2240
2120
2010
1920
1840
1760
1700
1640
1590
1540
1500
1450
1380
1320
1260
1210
1170
1130
1090
1060
1030
1000
31 600
21 700
17 400
14 900
13 200
12 000
11 000
10 200
9610
9080
8050
7290
6710
6240
5530
5010
4610
4290
4020
3800
3610
3440
3300
3170
3050
2950
2850
2770
2690
2610
2480
2370
2270
2180
2100
2030
1960
1900
1850
1800
3
SDR 11
87 300
60 000
48 200
41 200
36 600
33 100
30 500
28 300
26 600
25 100
22 300
20 200
18 600
17 300
15 300
13 900
12 800
11 900
11 100
10 500
9990
9530
9130
8770
8450
8160
7890
7650
7430
7230
6870
6550
6270
6030
5810
5610
5430
5260
5110
4970
169 000
116 000
93 200
79 700
70 700
64 000
58 900
54 800
51 400
48 600
43 000
39 000
35 900
33 400
29 600
26 800
24 700
22 900
21 500
20 300
19 300
18 400
17 600
16 900
16 300
15 800
15 300
14 800
14 400
14 000
13 300
12 700
12 100
11 600
11 200
10 800
10 500
10 200
9900
9600
2.864
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.00787 L/s, 1 pound-force per square inch = 6.894 kPa
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
4
SDR 11
3.682
211
FUEL PIPING
TABLE 12-27 1216.2(22)
POLYETHYLENE PLASTIC TUBING [NFPA 54-12: TABLE 6.2(uw)]
GAS: NATURAL
TABLE 12-28 1216.2(23)
POLYETHYLENE PLASTIC TUBING [NFPA 54-12: TABLE 6.2(vx)]
GAS: NATURAL
INLET PRESSURE: LESS THAN 2.0 psi
INLET PRESSURE: LESS THAN 2.0 psi
PRESSURE DROP: 0.3 in. w.c.
PRESSURE DROP: 0.5 in. w.c.
SPECIFIC GRAVITY: 0.60
NOMINAL OD:
DESIGNATION:
ACTUAL ID:
LENGTH (feet)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
225
250
275
300
350
400
450
500
PLASTIC TUBING SIZE (CTS)* (inch)
1
⁄2
SDR 7.00
0.445
3
⁄4
SDR 11.00
0.927
CAPACITY IN CUBIC FEET OF GAS PER HOUR
54
37
30
26
23
21
19
18
17
16
14
13
12
11
10
NA
NA
NA
NA
NA
NA
NA
372
256
205
176
156
141
130
121
113
107
95
86
79
74
69
65
62
59
54
51
47
45
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour =
0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column = 0.249 kPa
* CTS = Copper tube size.
Notes:
(1) All tTable entries are rounded to 3 significant digits.
(2) NA means a flow of less than 10 cfh ft3/h (0.08 L/s).
212
SPECIFIC GRAVITY: 0.60
NOMINAL OD:
DESIGNATION:
ACTUAL ID:
LENGTH (feet)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
225
250
275
300
350
400
450
500
PLASTIC TUBING SIZE (CTS)* (inch)
1
⁄2
SDR 7.00
0.445
3
⁄4
SDR 11.00
0.927
CAPACITY IN CUBIC FEET OF GAS PER HOUR
72
49
39
34
30
27
25
23
22
21
18
17
15
14
13
12
11
11
10
NA
NA
NA
490
337
271
232
205
186
171
159
149
141
125
113
104
97
91
86
82
78
72
67
63
59
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour =
0.00787 L/s, 1 pound-force per square inch = 6.894 kPa, 1 inch water column = 0.249 kPa
* CTS = Copper tube size.
Notes:
(1) All tTable entries are rounded to 3 significant digits.
(2) NA means a flow of less than 10 cfh ft3/h (0.08 L/s).
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-29 1216.2(24)
SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3(a)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 10.0 psi
PRESSURE DROP: 1.0 psi
SPECIFIC GRAVITY: 1.50
INTENDED USE: PIPE SIZING BETWEEN FIRST STAGE (HIGH PRESSURE REGULATOR) AND SECOND STAGE (LOW PRESSURE REGULATOR).
NOMINAL
INSIDE:
ACTUAL:
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
⁄2
0.622
3320
2280
1830
1570
1390
1260
1160
1080
1010
956
848
768
706
657
582
528
486
452
424
400
380
363
347
334
321
310
300
291
283
275
261
249
239
229
221
213
206
200
194
189
3
⁄4
0.824
6950
4780
3840
3280
2910
2640
2430
2260
2120
2000
1770
1610
1480
1370
1220
1100
1020
945
886
837
795
759
726
698
672
649
628
609
592
575
546
521
499
480
462
446
432
419
407
395
1
1.049
13 100
9000
7220
6180
5480
4970
4570
4250
3990
3770
3340
3020
2780
2590
2290
2080
1910
1780
1670
1580
1500
1430
1370
1310
1270
1220
1180
1150
1110
1080
1030
982
940
903
870
840
813
789
766
745
PIPE SIZE (inch)
11⁄4
1.380
11⁄2
1.610
2
2.067
CAPACITY IN THOUSANDS OF BTU PER HOUR
26 900
18 500
14 800
12 700
11 300
10 200
9380
8730
8190
7730
6850
6210
5710
5320
4710
4270
3930
3650
3430
3240
3070
2930
2810
2700
2600
2510
2430
2360
2290
2230
2110
2020
1930
1850
1790
1730
1670
1620
1570
1530
40 300
27 700
22 200
19 000
16 900
15 300
14 100
13 100
12 300
11 600
10 300
9300
8560
7960
7060
6400
5880
5470
5140
4850
4610
4400
4210
4040
3900
3760
3640
3530
3430
3330
3170
3020
2890
2780
2680
2590
2500
2430
2360
2290
77 600
53 300
42 800
36 600
32 500
29 400
27 100
25 200
23 600
22 300
19 800
17 900
16 500
15 300
13 600
12 300
11 300
10 500
9890
9340
8870
8460
8110
7790
7500
7240
7010
6800
6600
6420
6100
5820
5570
5350
5160
4980
4820
4670
4540
4410
21⁄2
2.469
124 000
85 000
68 200
58 400
51 700
46 900
43 100
40 100
37 700
35 600
31 500
28 600
26 300
24 400
21 700
19 600
18 100
16 800
15 800
14 900
14 100
13 500
12 900
12 400
12 000
11 500
11 200
10 800
10 500
10 200
9720
9270
8880
8530
8220
7940
7680
7450
7230
7030
3
3.068
219 000
150 000
121 000
103 000
91 500
82 900
76 300
70 900
66 600
62 900
55 700
50 500
46 500
43 200
38 300
34 700
31 900
29 700
27 900
26 300
25 000
23 900
22 800
21 900
21 100
20 400
19 800
19 200
18 600
18 100
17 200
16 400
15 700
15 100
14 500
14 000
13 600
13 200
12 800
12 400
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.894 kPa
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
4
4.026
446 000
306 000
246 000
211 000
187 000
169 000
156 000
145 000
136 000
128 000
114 000
103 000
94 700
88 100
78 100
70 800
65 100
60 600
56 800
53 700
51 000
48 600
46 600
44 800
43 100
41 600
40 300
39 100
37 900
36 900
35 000
33 400
32 000
30 800
29 600
28 600
27 700
26 900
26 100
25 400
213
FUEL PIPING
TABLE 12-30 1216.2(25)
SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3(b)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 10.0 psi
PRESSURE DROP: 3.0 psi
SPECIFIC GRAVITY: 1.50
INTENDED USE: PIPE SIZING BETWEEN FIRST STAGE (HIGH PRESSURE REGULATOR) AND SECOND STAGE (LOW PRESSURE REGULATOR).
NOMINAL
INSIDE:
ACTUAL:
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
⁄2
0.622
5890
4050
3250
2780
2460
2230
2050
1910
1790
1690
1500
1360
1250
1160
1030
935
860
800
751
709
673
642
615
591
569
550
532
516
501
487
463
442
423
406
391
378
366
355
344
335
3
⁄4
0.824
12 300
8460
6790
5810
5150
4670
4300
4000
3750
3540
3140
2840
2620
2430
2160
1950
1800
1670
1570
1480
1410
1340
1290
1240
1190
1150
1110
1080
1050
1020
968
923
884
849
818
790
765
741
720
700
1
1.049
23 200
15 900
12 800
11 000
9710
8790
8090
7530
7060
6670
5910
5360
4930
4580
4060
3680
3390
3150
2960
2790
2650
2530
2420
2330
2240
2170
2100
2030
1970
1920
1820
1740
1670
1600
1540
1490
1440
1400
1360
1320
PIPE SIZE (inch)
11⁄4
1.380
11⁄2
1.610
2
2.067
CAPACITY IN THOUSANDS OF BTU PER HOUR
47 600
32 700
26 300
22 500
19 900
18 100
16 600
15 500
14 500
13 700
12 100
11 000
10 100
9410
8340
7560
6950
6470
6070
5730
5450
5200
4980
4780
4600
4450
4300
4170
4050
3940
3740
3570
3420
3280
3160
3060
2960
2870
2780
2710
71 300
49 000
39 400
33 700
29 900
27 100
24 900
23 200
21 700
20 500
18 200
16 500
15 200
14 100
12 500
11 300
10 400
9690
9090
8590
8160
7780
7450
7160
6900
6660
6450
6250
6070
5900
5610
5350
5120
4920
4740
4580
4430
4300
4170
4060
137 000
94 400
75 800
64 900
57 500
52 100
47 900
44 600
41 800
39 500
35 000
31 700
29 200
27 200
24 100
21 800
20 100
18 700
17 500
16 500
15 700
15 000
14 400
13 800
13 300
12 800
12 400
12 000
11 700
11 400
10 800
10 300
9870
9480
9130
8820
8530
8270
8040
7820
21⁄2
2.469
219 000
150 000
121 000
103 000
91 600
83 000
76 400
71 100
66 700
63 000
55 800
50 600
46 500
43 300
38 400
34 800
32 000
29 800
27 900
26 400
25 000
23 900
22 900
22 000
21 200
20 500
19 800
19 200
18 600
18 100
17 200
16 400
15 700
15 100
14 600
14 100
13 600
13 200
12 800
12 500
3
3.068
387 000
266 000
214 000
183 000
162 000
147 000
135 000
126 000
118 000
111 000
98 700
89 400
82 300
76 500
67 800
61 500
56 500
52 600
49 400
46 600
44 300
42 200
40 500
38 900
37 400
36 200
35 000
33 900
32 900
32 000
30 400
29 000
27 800
26 700
25 700
24 800
24 000
23 300
22 600
22 000
For SI units:1 inch = 25 mm 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.894 kPa
Note: All tTable entries are rounded to 3 significant digits.
214
4
4.026
789 000
543 000
436 000
373 000
330 000
299 000
275 000
256 000
240 000
227 000
201 000
182 000
167 800
156 100
138 400
125 400
115 300
107 300
100 700
95 100
90 300
86 200
82 500
79 300
76 400
73 700
71 400
69 200
67 200
65 400
62 100
59 200
56 700
54 500
52 500
50 700
49 000
47 600
46 200
44 900
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-31 1216.2(26)
SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3(c)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 2.0 psi
PRESSURE DROP: 1.0 psi
SPECIFIC GRAVITY: 1.50
INTENDED USE: PIPE SIZING BETWEEN 2 PSI SERVICE AND LINE PRESSURE REGULATOR
NOMINAL
ACTUAL ID:
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
⁄2
0.622
2680
1840
1480
1260
1120
1010
934
869
815
770
682
618
569
529
469
425
391
364
341
322
306
292
280
269
259
250
242
235
228
222
210
201
192
185
178
172
166
161
157
152
3
⁄4
0.824
5590
3850
3090
2640
2340
2120
1950
1820
1700
1610
1430
1290
1190
1110
981
889
817
760
714
674
640
611
585
562
541
523
506
490
476
463
440
420
402
386
372
359
348
337
327
318
1
1.049
10 500
7240
5820
4980
4410
4000
3680
3420
3210
3030
2690
2440
2240
2080
1850
1670
1540
1430
1340
1270
1210
1150
1100
1060
1020
985
953
924
897
873
829
791
757
727
701
677
655
635
617
600
PIPE SIZE (inch)
1 1 ⁄4
1.380
11⁄2
1.610
2
2.067
CAPACITY IN THOUSANDS OF BTU PER HOUR
21 600
14 900
11 900
10 200
9060
8210
7550
7020
6590
6230
5520
5000
4600
4280
3790
3440
3160
2940
2760
2610
2480
2360
2260
2170
2090
2020
1960
1900
1840
1790
1700
1620
1550
1490
1440
1390
1340
1300
1270
1230
32 400
22 300
17 900
15 300
13 600
12 300
11 300
10 500
9880
9330
8270
7490
6890
6410
5680
5150
4740
4410
4130
3910
3710
3540
3390
3260
3140
3030
2930
2840
2760
2680
2550
2430
2330
2240
2160
2080
2010
1950
1900
1840
62 400
42 900
34 500
29 500
26 100
23 700
21 800
20 300
19 000
18 000
15 900
14 400
13 300
12 300
10 900
9920
9120
8490
7960
7520
7140
6820
6530
6270
6040
5830
5640
5470
5310
5170
4910
4680
4490
4310
4150
4010
3880
3760
3650
3550
21⁄2
2.469
99 500
68 400
54 900
47 000
41 700
37 700
34 700
32 300
30 300
28 600
25 400
23 000
21 200
19 700
17 400
15 800
14 500
13 500
12 700
12 000
11 400
10 900
10 400
9990
9630
9300
9000
8720
8470
8240
7830
7470
7150
6870
6620
6390
6180
6000
5820
5660
3
3.068
176 000
121 000
97 100
83 100
73 700
66 700
61 400
57 100
53 600
50 600
44 900
40 700
37 400
34 800
30 800
27 900
25 700
23 900
22 400
21 200
20 100
19 200
18 400
17 700
17 000
16 400
15 900
15 400
15 000
14 600
13 800
13 200
12 600
12 100
11 700
11 300
10 900
10 600
10 300
10 000
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.894 kPa
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
4
4.026
359 000
247 000
198 000
170 000
150 000
136 000
125 000
116 000
109 000
103 000
91 500
82 900
76 300
71 000
62 900
57 000
52 400
48 800
45 800
43 200
41 100
39 200
37 500
36 000
34 700
33 500
32 400
31 500
30 500
29 700
28 200
26 900
25 800
24 800
23 900
23 000
22 300
21 600
21 000
20 400
215
FUEL PIPING
TABLE 12-32 1216.2(27)
SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3(d)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 11.0 in. w.c.
PRESSURE DROP: 0.5 in. w.c.
SPECIFIC GRAVITY: 1.50
INTENDED USE: PIPE SIZING BETWEEN SINGLE OR SECOND STAGE (LOW PRESSURE REGULATOR) AND APPLIANCE
NOMINAL
INSIDE:
ACTUAL ID:
LENGTH (feet.)
10
20
30
40
50
60
80
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
⁄2
0.622
291
200
160
137
122
110
101
94
89
84
74
67
62
58
51
46
42
40
37
35
33
32
30
29
28
27
26
25
25
24
23
22
21
20
19
19
18
18
3
⁄4
0.824
608
418
336
287
255
231
212
197
185
175
155
140
129
120
107
97
89
83
78
73
70
66
64
61
59
57
55
53
52
50
48
46
44
42
40
39
38
37
1
1.049
1150
787
632
541
480
434
400
372
349
330
292
265
243
227
201
182
167
156
146
138
131
125
120
115
111
107
104
100
97
95
90
86
82
79
76
74
71
69
PIPE SIZE (inch)
11⁄4
1.380
11⁄2
1.610
2
2.067
CAPACITY IN THOUSANDS OF BTU PER HOUR
2350
1620
1300
1110
985
892
821
763
716
677
600
543
500
465
412
373
344
320
300
283
269
257
246
236
227
220
213
206
200
195
185
176
169
162
156
151
146
142
3520
2420
1940
1660
1480
1340
1230
1140
1070
1010
899
814
749
697
618
560
515
479
449
424
403
385
368
354
341
329
319
309
300
292
277
264
253
243
234
226
219
212
6790
4660
3750
3210
2840
2570
2370
2200
2070
1950
1730
1570
1440
1340
1190
1080
991
922
865
817
776
741
709
681
656
634
613
595
578
562
534
509
487
468
451
436
422
409
21⁄2
2.469
10 800
7430
5970
5110
4530
4100
3770
3510
3290
3110
2760
2500
2300
2140
1900
1720
1580
1470
1380
1300
1240
1180
1130
1090
1050
1010
978
948
921
895
850
811
777
746
719
694
672
652
3
3.068
19 100
13100
10 600
9030
8000
7250
6670
6210
5820
5500
4880
4420
4060
3780
3350
3040
2790
2600
2440
2300
2190
2090
2000
1920
1850
1790
1730
1680
1630
1580
1500
1430
1370
1320
1270
1230
1190
1150
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa
Note: All tTable entries are rounded to 3 significant digits.
216
4
4.026
39 000
26 800
21 500
18 400
16 300
14 800
13 600
12 700
11 900
11 200
9950
9010
8290
7710
6840
6190
5700
5300
4970
4700
4460
4260
4080
3920
3770
3640
3530
3420
3320
3230
3070
2930
2800
2690
2590
2500
2420
2350
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-33 1216.2(28)
SEMI-RIGID COPPER TUBING [NFPA 54-09: TABLE 6.3(e)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 10.0 psi
PRESSURE DROP: 1.0 psi
SPECIFIC GRAVITY: 1.50
INTENDED USE: TUBE SIZING BETWEEN FIRST STAGE (HIGH PRESSURE) REGULATOR AND SECOND STAGE (LOW PRESSURE) REGULATOR.
NOMINAL:
K & L:
ACR:
OUTSIDE:
INSIDE:*
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
3
⁄4
⁄8
0.375
0.305
513
352
283
242
215
194
179
166
156
147
131
118
109
101
90
81
75
70
65
62
59
56
54
51
50
48
46
45
44
42
40
38
37
35
34
33
32
31
30
29
3
1
⁄8
⁄2
0.500
0.402
1060
727
584
500
443
401
369
343
322
304
270
244
225
209
185
168
155
144
135
127
121
115
111
106
102
99
96
93
90
88
83
79
76
73
70
68
66
64
62
60
1
5
⁄2
⁄8
0.625
0.527
2150
1480
1190
1020
901
816
751
699
655
619
549
497
457
426
377
342
314
292
274
259
246
235
225
216
208
201
195
189
183
178
169
161
155
148
143
138
134
130
126
122
TUBE SIZE (inch)
5
3
⁄8
⁄4
0.750
0.652
3
7
⁄4
⁄8
0.875
0.745
1
11⁄4
11⁄2
2
1.125
1.375
1.625
2.125
20 500
14 100
11 300
9690
8590
7780
7160
6660
6250
5900
5230
4740
4360
4060
3600
3260
3000
2790
2620
2470
2350
2240
2140
2060
1980
1920
1850
1800
1750
1700
1610
1540
1470
1420
1360
1320
1270
1240
1200
1170
32 300
22 200
17 900
15 300
13 500
12 300
11 300
10 500
9850
9310
8250
7470
6880
6400
5670
5140
4730
4400
4130
3900
3700
3530
3380
3250
3130
3020
2920
2840
2750
2680
2540
2430
2320
2230
2150
2080
2010
1950
1890
1840
67 400
46 300
37 200
31 800
28 200
25 600
23 500
21 900
20 500
19 400
17 200
15 600
14 300
13 300
11 800
10 700
9840
9160
8590
8120
7710
7350
7040
6770
6520
6290
6090
5910
5730
5580
5300
5050
4840
4650
4480
4330
4190
4060
3940
3830
1 ⁄8
1
0.995
CAPACITY IN THOUSANDS OF BTU PER HOUR
3760
2580
2080
1780
1570
1430
1310
1220
1150
1080
959
869
799
744
659
597
549
511
480
453
430
410
393
378
364
351
340
330
320
311
296
282
270
260
250
241
234
227
220
214
5330
3670
2940
2520
2230
2020
1860
1730
1630
1540
1360
1230
1130
1060
935
847
779
725
680
643
610
582
558
536
516
498
482
468
454
442
420
400
383
368
355
343
331
321
312
304
11 400
7830
6290
5380
4770
4320
3980
3700
3470
3280
2910
2630
2420
2250
2000
1810
1660
1550
1450
1370
1300
1240
1190
1140
1100
1060
1030
1000
970
944
896
855
819
787
758
732
708
687
667
648
1 ⁄8
3
1.245
–
1.481
–
1.959
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.894 kPa
*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
217
FUEL PIPING
TABLE 12-34 1216.2(29)
SEMI-RIGID COPPER TUBING [NFPA 54-09: TABLE 6.3(f)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 11.0 in. w.c.
PRESSURE DROP: 0.5 in. w.c.
SPECIFIC GRAVITY: 1.50
INTENDED USE: TUBE SIZING BETWEEN SINGLE OR SECOND STAGE (LOW PRESSURE REGULATOR) AND APPLIANCE.
NOMINAL:
K & L:
ACR:
OUTSIDE:
INSIDE:*
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
3
⁄4
⁄8
0.375
0.305
45
31
25
21
19
17
16
15
14
13
11
10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
3
1
⁄8
⁄2
0.500
0.402
93
64
51
44
39
35
32
30
28
27
24
21
20
18
16
15
14
13
12
11
11
10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
1
5
⁄2
⁄8
0.625
0.527
188
129
104
89
79
71
66
61
57
54
48
44
40
37
33
30
28
26
24
23
22
21
20
19
18
18
17
17
16
16
15
14
14
13
13
12
12
11
11
11
TUBE SIZE (inch)
5
3
⁄8
⁄4
0.750
0.652
3
7
⁄4
⁄8
0.875
0.745
1
11⁄4
11⁄2
2
1.125
1.375
1.625
2.125
1800
1230
991
848
752
681
626
583
547
517
458
415
382
355
315
285
262
244
229
216
205
196
188
180
174
168
162
157
153
149
141
135
129
124
119
115
112
108
105
102
2830
1950
1560
1340
1180
1070
988
919
862
814
722
654
602
560
496
449
414
385
361
341
324
309
296
284
274
264
256
248
241
234
223
212
203
195
188
182
176
170
166
161
5890
4050
3250
2780
2470
2240
2060
1910
1800
1700
1500
1360
1250
1170
1030
936
861
801
752
710
674
643
616
592
570
551
533
517
502
488
464
442
423
407
392
378
366
355
345
335
1 ⁄8
1
0.995
CAPACITY IN THOUSANDS OF BTU PER HOUR
329
226
182
155
138
125
115
107
100
95
84
76
70
65
58
52
48
45
42
40
38
36
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
20
19
19
467
321
258
220
195
177
163
152
142
134
119
108
99
92
82
74
68
63
60
56
53
51
49
47
45
44
42
41
40
39
37
35
34
32
31
30
29
28
27
27
997
685
550
471
417
378
348
324
304
287
254
230
212
197
175
158
146
136
127
120
114
109
104
100
96
93
90
87
85
83
78
75
72
69
66
64
62
60
58
57
1 ⁄8
3
1.245
–
1.481
–
1.959
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa
*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
Note:
(1) All tTable entries are rounded to 3 significant digits.
(2) NA means a flow of less than 10,000 Btu/hr. (2.90 kW)
218
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-35 1216.2(30)
SEMI-RIGID COPPER TUBING [NFPA 54-09: TABLE 6.3(g)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 2.0 psi
PRESSURE DROP: 1.0 psi
SPECIFIC GRAVITY: 1.50
INTENDED USE: TUBE SIZING BETWEEN 2 PSIG SERVICE AND LINE PRESSURE REGULATOR
NOMINAL:
K & L:
ACR:
OUTSIDE:
INSIDE:*
LENGTH (feet.)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
3
⁄4
⁄8
0.375
0.305
413
284
228
195
173
157
144
134
126
119
105
95
88
82
72
66
60
56
53
50
47
45
43
41
40
39
37
36
35
34
32
31
30
28
27
26
26
25
24
23
3
1
⁄8
⁄2
0.500
0.402
852
585
470
402
356
323
297
276
259
245
217
197
181
168
149
135
124
116
109
103
97
93
89
86
82
80
77
75
72
71
67
64
61
59
57
55
53
51
50
48
1
5
⁄2
⁄8
0.625
0.527
1730
1190
956
818
725
657
605
562
528
498
442
400
368
343
304
275
253
235
221
209
198
189
181
174
168
162
157
152
147
143
136
130
124
120
115
111
108
104
101
99
TUBE SIZE (inch)
5
3
⁄8
⁄4
0.750
0.652
3
7
⁄4
⁄8
0.875
0.745
1
1 1 ⁄4
11⁄2
2
1.125
1.375
1.625
2.125
16 500
11 400
9120
7800
6920
6270
5760
5360
5030
4750
4210
3820
3510
3270
2900
2620
2410
2250
2110
1990
1890
1800
1730
1660
1600
1540
1490
1450
1410
1370
1300
1240
1190
1140
1100
1060
1030
1000
966
940
26 000
17 900
14 400
12 300
10 900
9880
9090
8450
7930
7490
6640
6020
5540
5150
4560
4140
3800
3540
3320
3140
2980
2840
2720
2620
2520
2430
2350
2280
2220
2160
2050
1950
1870
1800
1730
1670
1620
1570
1520
1480
54 200
37 300
29 900
25 600
22 700
20 600
18 900
17 600
16 500
15 600
13 800
12 500
11 500
10 700
9510
8610
7920
7370
6920
6530
6210
5920
5670
5450
5250
5070
4900
4750
4620
4490
4270
4070
3900
3740
3610
3480
3370
3270
3170
3090
1 ⁄8
1
0.995
CAPACITY IN THOUSANDS OF BTU PER HOUR
3030
2080
1670
1430
1270
1150
1060
983
922
871
772
700
644
599
531
481
442
411
386
365
346
330
316
304
293
283
274
265
258
251
238
227
217
209
201
194
188
182
177
172
4300
2950
2370
2030
1800
1630
1500
1390
1310
1240
1100
992
913
849
753
682
628
584
548
517
491
469
449
431
415
401
388
376
366
356
338
322
309
296
286
276
267
259
251
244
9170
6310
5060
4330
3840
3480
3200
2980
2790
2640
2340
2120
1950
1810
1610
1460
1340
1250
1170
1110
1050
1000
959
921
888
857
829
804
781
760
721
688
659
633
610
589
570
553
537
522
1 ⁄8
3
1.245
–
1.481
–
1.959
For SI units:1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.894 kPa
*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
219
FUEL PIPING
TABLE 12-36 1216.2(31)
CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-09: TABLE 6.3(h)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 11.0 in. w.c.
PRESSURE DROP: 0.5 in. w.c.
SPECIFIC GRAVITY: 1.50
INTENDED USE: CSST SIZING BETWEEN SINGLE OR SECOND STAGE (LOW PRESSURE) REGULATOR AND APPLIANCE SHUTOFF VALVE
FLOW DESIGNATION:
LENGTH (feet)
5
10
15
20
25
30
40
50
60
70
80
90
100
150
200
250
300
13
72
50
39
34
30
28
23
20
19
17
15
15
14
11
9
8
8
15
99
69
55
49
42
39
33
30
26
25
23
22
20
15
14
12
11
18
181
129
104
91
82
74
64
58
53
49
45
44
41
31
28
25
23
19
211
150
121
106
94
87
74
66
60
57
52
50
47
36
33
30
26
23
355
254
208
183
164
151
131
118
107
99
94
90
85
66
60
53
50
25
30
TUBE SIZE (EHD)*
31
37
39
46
CAPACITY IN THOUSANDS OF BTU PER HOUR
426
303
248
216
192
177
153
137
126
117
109
102
98
75
69
61
57
744
521
422
365
325
297
256
227
207
191
178
169
159
123
112
99
90
863
605
490
425
379
344
297
265
241
222
208
197
186
143
129
117
107
1420
971
775
661
583
528
449
397
359
330
307
286
270
217
183
163
147
1638
1179
972
847
762
698
610
548
502
466
438
414
393
324
283
254
234
2830
1990
1620
1400
1250
1140
988
884
805
745
696
656
621
506
438
390
357
48
3270
2320
1900
1650
1480
1350
1170
1050
961
890
833
787
746
611
531
476
434
60
5780
4110
3370
2930
2630
2400
2090
1870
1710
1590
1490
1400
1330
1090
948
850
777
62
6550
4640
3790
3290
2940
2680
2330
2080
1900
1760
1650
1550
1480
1210
1050
934
854
For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa
*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the
greater the gas capacity of the tubing.
Notes:
(1) Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, and/or fittings, or both shall be increased
by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings, and/or
bends, or both.
(2) All tTable entries are rounded to 3 significant digits.
220
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-37 1216.2(32)
CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-09: TABLE 6.3(i)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 2.0 psi
PRESSURE DROP: 1.0 psi
SPECIFIC GRAVITY: 1.50
INTENDED USE: CSST SIZING BETWEEN 2 PSI SERVICE AND LINE PRESSURE REGULATOR
FLOW DESIGNATION:
LENGTH (feet)
10
25
30
40
50
75
80
100
150
200
250
300
400
500
13
426
262
238
203
181
147
140
124
101
86
77
69
60
53
15
558
347
316
271
243
196
189
169
137
118
105
96
82
72
18
927
591
540
469
420
344
333
298
245
213
191
173
151
135
19
1110
701
640
554
496
406
393
350
287
248
222
203
175
158
23
1740
1120
1030
896
806
663
643
578
477
415
373
343
298
268
25
30
TUBE SIZE (EHD)*
31
37
39
46
CAPACITY IN THOUSANDS OF BTU PER HOUR
2170
1380
1270
1100
986
809
768
703
575
501
448
411
355
319
4100
2560
2330
2010
1790
1460
1410
1260
1020
880
785
716
616
550
4720
2950
2690
2320
2070
1690
1630
1450
1180
1020
910
829
716
638
7130
4560
4180
3630
3260
2680
2590
2330
1910
1660
1490
1360
1160
1030
7958 15 200
5147
9550
4719
8710
4116
7530
3702
6730
3053
5480
2961
5300
2662
4740
2195
3860
1915
3340
1722
2980
1578
2720
1376
2350
1237
2100
48
16 800
10 700
9790
8500
7610
6230
6040
5410
4430
3840
3440
3150
2730
2450
60
29 400
18 800
17 200
14 900
13 400
11 000
10 600
9530
7810
6780
6080
5560
4830
4330
62
34 200
21 700
19 800
17 200
15 400
12 600
12 200
10 900
8890
7710
6900
6300
5460
4880
For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.894 kPa
*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the
greater the gas capacity of the tubing.
Notes:
(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1 psi (6.89 kPa), do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may vary are capable of varying with flow rate.
(2) CAUTION: Capacities shown in table may exceed are capable of exceeding the maximum capacity for a selected regulator. Consult with regulator or tubing
manufacturer for guidance.
(3) Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, and/or fittings, or both shall be increased
by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings, and/or
bends, or both.
(4) All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
221
FUEL PIPING
TABLE 12-38 1216.2(33)
CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-09: TABLE 6.3(j)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 5.0 psi
PRESSURE DROP: 3.5 psi
FLOW DESIGNATION:
LENGTH (feet)
10
25
30
40
50
75
80
100
150
200
250
300
400
500
13
826
509
461
396
352
284
275
243
196
169
150
136
117
104
15
1070
664
603
520
463
376
363
324
262
226
202
183
158
140
18
1710
1090
999
867
777
637
618
553
453
393
352
322
279
251
19
2060
1310
1190
1030
926
757
731
656
535
464
415
379
328
294
23
3150
2040
1870
1630
1460
1210
1170
1050
866
755
679
622
542
488
25
30
TUBE SIZE (EHD)*
31
37
SPECIFIC GRAVITY: 1.50
39
CAPACITY IN THOUSANDS OF BTU PER HOUR
4000
2550
2340
2030
1820
1490
1450
1300
1060
923
828
757
657
589
7830
4860
4430
3820
3410
2770
2680
2390
1940
1680
1490
1360
1170
1050
8950
5600
5100
4400
3930
3190
3090
2760
2240
1930
1730
1570
1360
1210
13100 14 444
8400 9339
7680 8564
6680 7469
5990 6717
4920 5539
4770 5372
4280 4830
3510 3983
3050 3474
2740 3124
2510 2865
2180 2498
1950 2247
46
28 600
18 000
16 400
14 200
12 700
10300
9990
8930
7270
6290
5620
5120
4430
3960
48
31 200
19 900
18 200
15 800
14 100
11 600
11 200
10 000
8210
7130
6390
5840
5070
4540
60
54 400
34 700
31 700
27 600
24 700
20 300
19 600
17 600
14 400
12 500
11 200
10 300
8920
8000
62
63800
40 400
36 900
32 000
28 600
23400
22 700
20 300
16 600
14 400
12 900
11 700
10 200
9110
For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.894 kPa
*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the
greater the gas capacity of the tubing.
Notes:
(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1 psi (6.89 kPa), do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may vary are capable of varying with flow rate.
(2) CAUTION: Capacities shown in table may exceed are capable of exceeding the maximum capacity for a selected regulator. Consult with regulator or tubing
manufacturer for guidance.
(3) Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, and/or fittings, or both shall be increased
by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings, and/or
bends, or both.
(4) All tTable entries are rounded to 3 significant digits.
222
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-39 1216.2(34)
POLYETHYLENE PLASTIC PIPE [NFPA 54-12: TABLE 6.3(k)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 11.0 in. w.c.
PRESSURE DROP: 0.5 in. w.c.
SPECIFIC GRAVITY: 1.50
INTENDED USE: PE SIZING BETWEEN INTEGRAL 2-STAGE REGULATOR AT TANK OR 2ND STAGE (LOW PRESSURE REGULATOR) AND BUILDING
NOMINAL OD:
DESIGNATION:
ACTUAL ID:
LENGTH (feet)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
1
⁄2
SDR 9.33
0.660
340
233
187
160
142
129
119
110
103
98
87
78
72
67
60
54
50
46
43
41
3
⁄4
SDR 11.00
0.860
680
468
375
321
285
258
237
221
207
196
173
157
145
135
119
108
99
92
87
82
PIPE SIZE (inch)
1
SDR 11.00
1.077
11⁄4
SDR 10.00
1.328
1 1 ⁄2
SDR 11.00
1.554
2
SDR 11.00
1.943
CAPACITY IN THOUSANDS OF BTU PER HOUR
1230
844
677
580
514
466
428
398
374
353
313
284
261
243
215
195
179
167
157
148
2130
1460
1170
1000
890
807
742
690
648
612
542
491
452
420
373
338
311
289
271
256
3210
2210
1770
1520
1340
1220
1120
1040
978
924
819
742
683
635
563
510
469
436
409
387
5770
3970
3180
2730
2420
2190
2010
1870
1760
1660
1470
1330
1230
1140
1010
916
843
784
736
695
3
SDR 11
2.864
16 000
11 000
8810
7540
6680
6050
5570
5180
4860
4590
4070
3690
3390
3160
2800
2530
2330
2170
2040
1920
For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
4
SDR 11
3.682
30 900
21 200
17 000
14 600
12 900
11 700
10 800
10 000
9400
8900
7900
7130
6560
6100
5410
4900
4510
4190
3930
3720
223
FUEL PIPING
TABLE 12-40 1216.2(35)
POLYETHYLENE PLASTIC PIPE [NFPA 54-12: TABLE 6.3(l)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 2.0 psi
PRESSURE DROP: 1.0 psi
SPECIFIC GRAVITY: 1.50
INTENDED USE: PE PIPE SIZING BETWEEN 2 PSI SERVICE REGULATOR AND LINE PRESSURE REGULATOR
NOMINAL OD:
DESIGNATION:
ACTUAL ID:
LENGTH (feet)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1
⁄2
SDR 9.33
0.660
3130
2150
1730
1480
1310
1190
1090
1010
952
899
797
722
664
618
548
496
457
425
399
377
358
341
327
314
302
292
283
274
266
259
246
234
225
216
208
201
194
188
183
178
3
⁄4
SDR 11.00
0.860
6260
4300
3450
2960
2620
2370
2180
2030
1910
1800
1600
1450
1330
1240
1100
994
914
851
798
754
716
683
654
628
605
585
566
549
533
518
492
470
450
432
416
402
389
377
366
356
PIPE SIZE (inch)
1
SDR 11.00
1.077
11⁄4
SDR 10.00
1.328
11⁄2
SDR 11.00
1.554
2
SDR 11.00
1.943
CAPACITY IN THOUSANDS OF BTU PER HOUR
11 300
7760
6230
5330
4730
4280
3940
3670
3440
3250
2880
2610
2400
2230
1980
1790
1650
1530
1440
1360
1290
1230
1180
1130
1090
1050
1020
990
961
935
888
847
811
779
751
725
702
680
661
643
19 600
13 400
10 800
9240
8190
7420
6830
6350
5960
5630
4990
4520
4160
3870
3430
3110
2860
2660
2500
2360
2240
2140
2040
1960
1890
1830
1770
1710
1670
1620
1540
1470
1410
1350
1300
1260
1220
1180
1140
1110
29 500
20 300
16 300
14 000
12 400
11 200
10 300
9590
9000
8500
7530
6830
6280
5840
5180
4690
4320
4020
3770
3560
3380
3220
3090
2970
2860
2760
2670
2590
2520
2450
2320
2220
2120
2040
1960
1900
1840
1780
1730
1680
53100
36 500
29 300
25 100
22 200
20 100
18 500
17 200
16 200
15 300
13 500
12 300
11 300
10 500
9300
8430
7760
7220
6770
6390
6070
5790
5550
5330
5140
4960
4800
4650
4520
4400
4170
3980
3810
3660
3530
3410
3300
3200
3110
3020
3
SDR 11
147 000
101 000
81 100
69 400
61 500
55 700
51 300
47 700
44 700
42 300
37 500
33 900
31 200
29 000
25 700
23 300
21 500
12 000
18 700
17 700
16 800
16 000
15 400
14 700
14 200
13 700
13 300
12 900
12 500
12 200
11 500
11 000
10 600
10 100
9760
9430
9130
8850
8590
8360
284 000
195 000
157 000
134 100
119 000
108 000
99 100
92 200
86 500
81 700
72 400
65 600
60 300
56 100
49 800
45100
41500
38600
36 200
34 200
32 500
31 000
29 700
28 500
27 500
26 500
25 700
24 900
24 200
23 500
22 300
21 300
20 400
19 600
18 900
18 200
17 600
17 100
16 600
16 200
2.864
For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.894 kPa
Note: All tTable entries are rounded to 3 significant digits.
224
4
SDR 11
3.682
UNIFORM PLUMBING CODE
FUEL PIPING
TABLE 12-41 1216.2(36)
POLYETHYLENE PLASTIC TUBING [NFPA 54-12: TABLE 6.3(m)]
GAS: UNDILUTED PROPANE
INLET PRESSURE: 11.0 in. w.c.
PRESSURE DROP: 0.5 in. w.c.
SPECIFIC GRAVITY: 1.50
INTENDED USE: PE TUBE SIZING BETWEEN INTEGRAL
2-STAGE REGULATOR AT TANK OR SECOND STAGE (LOW PRESSURE
REGULATOR) AND BUILDING.
NOMINAL OD:
DESIGNATION:
ACTUAL ID:
LENGTH (feet)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
225
250
275
300
350
400
450
500
PLASTIC TUBING SIZE (CTS) (inch)
1
⁄2
SDR 7.00
0.445
3
⁄4
SDR 11.00
0.927
CAPACITY IN THOUSANDS OF BTU PER HOUR
121
83
67
57
51
46
42
39
37
35
31
28
26
24
22
21
20
19
18
16
15
15
828
569
457
391
347
314
289
269
252
238
211
191
176
164
154
145
138
132
121
113
106
100
For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units
per hour = 0.293kW, 1 inch water column = 0.249 kPa
Note: All tTable entries are rounded to 3 significant digits.
UNIFORM PLUMBING CODE
225
226
UNIFORM PLUMBING CODE