The Security Forces Medical Center Project
SECTION 15194 - FUEL GAS PIPING AND LPG STATION
PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and general provisions of the Contract, including Conditions of Contract and Division 1
Specification Sections, apply to this Section.
SUMMARY
A.
1.3
This Section includes fuel gas piping, specialties, and accessories within the building.
PROJECT CONDITIONS
A.
Gas System Pressures: Three pressure ranges. Primary pressure is more than 13.8 kPa (2.0 psig) but
not more than 34.5 kPa (5.0 psig), and is reduced to secondary pressures of more than 3.45 kPa (0.5
psig) but not more than 13.8 kPa (2.0 psig), and is reduced again to pressures of 3.45 kPa (0.5 psig)
or less.
B.
Design values of fuel gas supplied for these systems are as follows:
1.
Natural Gas:
a.
b.
2.
Liquefied Petroleum Gas, LPG:
a.
b.
1.4
Nominal Heating Value: 37.3 MJ/cu. m (1000 Btu/cu. ft.).
Nominal Specific Gravity: 0.6.
Nominal Heating Value: 100.0 MJ/cu. m (2675 Btu/cu. ft.).
Nominal Specific Gravity: 1.6.
GENERAL REQUIREMENTS
A.
Welding: Piping shall be welded in accordance with qualified procedures using performance
qualified welders and welding operators. Procedures and welders shall be qualified in accordance
with ASME Boiler and Pressure Vessel Code: Section IX. Welding procedures qualified by others,
and welders and welding operators qualified by another employer may be accepted as permitted by
ASME B31.1. The Engineer shall be furnished with a copy of qualified procedures and a list of
names and identification symbols of qualified welders and welding operators. The welder or welding
operator shall apply his assigned symbol near each weld he makes as a permanent record.
B.
Standard Products: Materials and equipment shall be the standard products of a manufacturer
regularly engaged in the manufacture of the products and shall essentially duplicate items that have
been in satisfactory use for at least 2 years prior to bid opening. Asbestos or products containing
asbestos shall not be used. Manufacturer's descriptive data and installation instructions shall be
submitted for approval for compression-type mechanical joints used in joining dissimilar materials
and for insulating joints. Valves, flanges and fittings shall be marked in accordance with MSS SP-25.
C.
Provide an interface panel to communicate and transmit data between the gas system and BMS. The
interface panel shall be capable of communication with the specified BMS system.
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1.5
TESTING AND COMMISSIONING
A.
Testing and commissioning shall be performed by a third party specialist agency with a minimum 10
years experience in testing and commissioning of LPG systems to perform the testing and
commissioning activities of LPG system along with leak detection, testing and commissioning and
interface with fire alarms, BMS and hood exhaust fire extinguishing systems.
B.
Installer Qualifications: Submit names and qualifications of the specialist agency. Submit information
on 3 recently completed projects. Submit list of proposed equipment
C.
Report: Provide complete signed and certified testing and commissioning report to the Engineer
showing all test measurements, calculations and list of instruments used.
1.6
SUBMITTALS
A.
Product Data: For the following:
1.
Specialty valves. Include pressure rating, capacity, settings, and electrical connection data of
selected models.
2.
Service-meter bars. Include service-meter size of selected models.
3.
Service meters. Include pressure rating and capacity of selected models.
4.
Service-meter bypass fittings.
5.
Pressure regulators. Include pressure rating, capacity, and settings of selected models.
B.
Shop Drawings: For fuel gas piping. Include plans and attachments to other Work. [Show different
pressure zones and indicate pressure for each zone.]
1.
C.
Field Test Reports: Indicate and interpret test results for compliance with performance requirements.
D.
Maintenance Data: For fuel gas specialties and accessories to include in maintenance manuals
specified in Division 1.
E.
Contractor to obtain GASCO certification on the facility for the LPG Station and Network upon
installation.
1.7
1.8
Wiring Diagrams: Power, signal, and control wiring. Differentiate between manufacturerinstalled and field-installed wiring.
QUALITY ASSURANCE
A.
Electrical Components and Devices: Listed and labeled as defined in NFPA 70, Article 100, by
testing agency acceptable to Engineer.
B.
ANSI Standard: Comply with ANSI Z223.1, "National Fuel Gas Code."
C.
FM Standard: Provide components listed in FM's "Fire Protection Approval Guide" if specified to be
FM approved.
D.
IAS Standard: Provide components listed in IAS's "Directory of A. G. A. and C. G. A Certified
Appliances and Accessories" if specified to be IAS listed.
E.
UL Standard: Provide components listed in UL's "Gas and Oil Equipment Directory" if specified to
be UL listed.
DELIVERY, STORAGE, AND HANDLING
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A.
1.9
Handling Flammable Liquids: Remove and legally dispose of liquids from drips in existing gas
piping. Handle cautiously to avoid spillage and ignition. Notify fuel gas supplier. Handle
flammable liquids used by Installer with proper precautions and do not leave on premises from end of
one day to beginning of next day.
COORDINATION
A.
Existing Utilities: Do not interrupt utilities serving facilities occupied by Employer or others unless
permitted under the following conditions and then only after arranging to provide temporary utility
services according to requirements indicated:
1.
2.
Notify Engineer not less than two days in advance of proposed utility interruptions.
Do not proceed with utility interruptions without Engineer's written permission.
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
Available Manufacturers: Subject to compliance with requirements, manufacturers offering products
that may be incorporated into the Work include, but are not limited to, the following:
1.
Appliance Connector Valves, DN 20 (NPS 3/4) and Smaller:
a.
b.
c.
d.
e.
f.
g.
h.
2.
Gas Valves, DN 50 (NPS 2) and Smaller:
a.
b.
c.
d.
e.
f.
g.
h.
3.
BMI Canada, Inc.
Crane Valves.
Grinnell Corp.
Jomar International, Ltd.
McDonald: A. Y. McDonald Mfg. Co.
Milwaukee Valve Co., Inc.
Mueller Co.; Mueller Gas Products Div.
Nibco, Inc.
Plug Valves, DN 65 (NPS 2-1/2) and Larger:
a.
b.
c.
d.
e.
4.
American Valve.
B&K Industries, Inc.
Conbraco Industries, Inc.; Apollo Div.
Jomar International, Ltd.
McDonald: A. Y. McDonald Mfg. Co.
Mueller Co.; Mueller Gas Products Div.
Newman Hattersley, Ltd.; Specialty Valve Div.
Watts Industries, Inc.; Water Products Div.
Flow Control Equipment, Inc.
Milliken Valve Co., Inc.
Nordstrom Valves, Inc.
Olson Technologies, Inc.; Homestead Valve Div.
Walworth Co.
Automatic Gas Valves:
a.
b.
c.
ASCO General Controls.
ASCOLECTRIC, Ltd.
Automatic Switch Co.
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d.
e.
f.
g.
h.
i.
5.
Electrically Operated Gas Valves:
a.
b.
c.
d.
e.
f.
g.
h.
6.
American Meter Co.
Lyall: R. W. Lyall & Co., Inc.
McDonald: A. Y. McDonald Mfg. Co.
Mueller Co.; Mueller Gas Products Div.
National Meter.
Schlumberger Industries; Gas Div.
Service-Meter Bypass Fittings:
a.
b.
11.
American Meter Co.
Badger Meter, Inc.; Utility Products Div.
Equimeter, Inc.
National Meter.
Schlumberger Industries; Gas Div.
Service-Meter Bars:
a.
b.
c.
d.
e.
f.
10.
Energy Pacific.
Safe T Quake Corp.
Seismic Safety Products, Inc.
Seismic Valve Co., Inc.
Trembler-Tech, Inc.
Westcoast Seismic Protection Co., Ltd.
Service Meters:
a.
b.
c.
d.
e.
9.
Quakemaster Seismic Safety Systems.
UL-Listed Earthquake Valves:
a.
b.
c.
d.
e.
f.
8.
ASCO General Controls.
Atkomatic Valve Co., Inc.
Automatic Switch Co.
Dungs: Karl Dungs, Inc.
Eclipse Combustion Inc.
Goyen Valve Corp.
Magnatrol Valve Corp.
Parker Hannifin Corp.; Climate & Industrial Controls Group; Skinner Valve Div.
FM-Listed Earthquake Valves:
a.
7.
Dungs: Karl Dungs, Inc.
Eaton Corp.; Controls Div.
Eclipse Combustion, Inc.
GPS Gas Protection Systems, Inc.
Honeywell, Inc.
Johnson Controls, Inc.
Lyall: R. W. Lyall & Co., Inc.
Williamson: T. D. Williamson, Inc.
Pressure Regulators:
a.
b.
c.
d.
e.
American Meter Co.
Eclipse Combustion, Inc.
Equimeter, Inc.
Fisher Controls International, Inc.
Maxitrol Co.
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f.
g.
h.
12.
Appliance Pressure Regulators:
a.
b.
c.
d.
e.
2.2
Canadian Meter Co., Inc.
Eaton Corp.; Controls Div.
Harper Wyman Co.
Maxitrol Co.
SCP, Inc.
PIPING MATERIALS
A.
2.3
Refer to Part 3 "Piping Applications" Article for applications of pipe, tube, fitting, and joining
materials.
PIPES, TUBES, FITTINGS, AND JOINING MATERIALS
A.
Steel Pipe: ASTM A 53; Type S; Grade B; Schedule 40; black.
1.
2.
3.
4.
5.
6.
7.
8.
2.4
National Meter.
Richards Industries, Inc.; Jordan Valve Div.
Schlumberger Industries; Gas Div.
Malleable-Iron Threaded Fittings: ASME B16.3, Class 150, standard pattern, with threaded
ends according to ASME B1.20.1.
Unions: ASME B16.39, Class 150, malleable iron with brass-to-iron seat, ground joint, and
threaded ends according to ASME B1.20.1.
Cast-Iron Flanges and Flanged Fittings: ASME B16.1, Class 125.
Steel Welding Fittings: ASME B16.9, wrought steel or ASME B16.11, forged steel.
Steel Threaded Fittings: ASME B16.11, forged steel with threaded ends according to
ASME B1.20.1.
Joint Compound and Tape: Suitable for fuel gas.
Steel Flanges and Flanged Fittings: ASME B16.5.
Gasket Material: Thickness, material, and type suitable for fuel gas.
Polyethylene Pipes & Fittings
A. Polyethylene Pipes: Polyethylene compounds utilized in the manufacture of products furnished under
this specification shall have a grade of PE24 or PE34, and minimum cell classification of PE213363 or
PE334464, as defined in ASTM D3350. In conformance with ASTM D2513, they shall have a PPI
recommended hydrostatic design basis (HDB) of 1250 psi (PE2406) or 1600 psi (PE3408) at a
temperature of 73.4°F (23°C). In addition, this HDB shall be substantiated by showing that
extrapolation of the stress regression curve is linear to the 438,000 hour intercept in accordance with
ASTM D2837. When any plastic material is used for transportation of liquefied petroleum gas (LPG),
it must qualify for use through testing with the corresponding gas as the test medium, and have a
hydrostatic design basis category of at least 1,000-psi (6.9 MPa) at 73.40F (230C), as determined by
ASTM D2837. Materials that qualify for LPG gas service and that carry a recommended HDB at
1400F in accordance with ASTM D2513 also qualify for LPG service without the need for further
testing. Clean rework material of the same type and grade, generated from the manufacturer’s own pipe
and fitting production, may be used by the same manufacturer as long as the pipe, tubing or fitting
produced meet all the requirements of ASTM D2513. (pipe color in yellow).
B. Pipe and Tubing furnished under this specification shall be manufactured using compounds complying
with the requirements of the paragraph above. Dimensional characteristics (including outside diameter,
wall thickness, toe-in, ovality and length) and performance characteristics (including chemical
resistance, sustained pressure, elevated temperature service, burst pressure/apparent tensile strength,
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joining, squeeze-off and outdoor storage stability) shall conform to the requirements of ASTM D2513
including applicable annexes. Pipe and Tubing may be supplied in either coils or straight lengths.
C. Polyethylene fittings furnished under this specification shall be manufactured using compounds
complying with the requirements of the paragraph above. Socket type fittings shall comply with ASTM
D2683. Butt fusion fittings shall comply with ASTM D3261. Electrofusion fittings shall comply with
ASTM F1055. Plastic mechanical fittings shall comply with ASTM F1924. Mechanical fittings
produced from metallic or materials other than plastics listed in Section II shall be approved only after
submission of appropriate test data and service histories indicating their acceptability for the intended
service. In addition, all mechanical fittings shall be categorized for pullout resistance as stated in
ASTM D2513 and identified as to the appropriate category. Plastic valves shall meet the requirements
of ANSI Standard B16.40.
D. Pipe and tubing shall be marked in accordance with ASTM D2513. Marking shall be legible and shall
remain legible under normal handling and installation practices. Indent marking may be utilized
provided (1) the marking does not reduce the wall thickness to less than the minimum value for the
pipe or tubing, (2) it has been demonstrated that these marks have no effect on the long term strength of
the pipe or tubing and (3) the marking will not provide leakage channels when approved elastomeric
gasket compression fittings are used to make joints. Fusion fittings shall be marked on the body or hub.
Marking shall be in accordance with ASTM D2513 or the standard to which the fitting is
manufactured. Mechanical fittings shall be marked in accordance with the fitting standard to which it is
manufactured.
2.5
PROTECTIVE COATING
A.
2.6
Furnish pipe and fittings with factory-applied, corrosion-resistant polyethylene coating for use in
corrosive atmosphere.
PIPING SPECIALTIES
A.
Flexible Connectors: ANSI Z21.24, copper alloy.
B.
Quick-Disconnect Devices: ANSI Z21.41, convenience outlets and matching plug connector.
C.
Flange Gaskets: Gaskets shall be non-asbestos compressed material in accordance with NFPA 54 and
ASME B16.21 1.6 mm thickness, full face or self-centering flat ring type. The gaskets shall contain
aramid fibers bonded with styrene butadiene rubber (SBR) suitable for a maximum 316 deg. C (600
deg. F) service.
D.
Appliance Connectors: Connectors shall be corrugated bronze metal with brazed inverted flare-type
brass fittings complete with transition for IPS connection. Maximum length shall be 1000 mm.
Connectors shall be AGA-approved type.
E.
Pressure Gages: Pressure gages shall conform to ASME B40.100, Type I, Class 1. Pressure-gage size
shall be 90 mm nominal diameter. Case shall be corrosion-resistant steel conforming to any of the
AISI 300-series of ASTM A 666, with a No. 4 standard commercial polish or better. All gages shall
be equipped with adjustable red marking pointer and damper screw adjustment in inlet connection.
F.
Line Strainers: Strainers shall be Y-type with removable basket. Strainers in sizes DN50 (2-inch) IPS
and smaller shall have screwed ends; sizes DN65 (2-1/2-inch) IPS and larger shall have flanged ends.
Body working pressure rating shall exceed maximum service pressure of system in which installed by
at least 50 percent. Body shall have cast-in arrows to indicate direction of flow. All strainer bodies
fitted with screwed screen retainer shall have straight threads and shall be gasketed with nonferrous
metal. Strainer bodies fitted with bolted-on screen retainers shall have offset blowdown holes. Body
material shall be cast bronze or cast iron conforming to Class 30 ASTM A 278 A 278M. Minimum
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free hole area of strainer element shall be equal to not less than 3-4 times the internal area of
connecting piping. Strainer screens shall have finished ends fitted to machined screen chamber
surfaces to preclude bypass flow. Strainer element material shall be AISI 316 corrosion-resistant.
2.7
SPECIALTY VALVES
A.
Valves, DN 50 (NPS 2) and Smaller: Threaded ends according to ASME B1.20.1 for pipe threads.
B.
Valves, DN 65 (NPS 2-1/2) and Larger: Flanged ends according to ASME B16.5 for steel flanges.
C.
Appliance Connector Valves, DN 20 (NPS 3/4) and Smaller: ANSI Z21.15 and IAS listed.
D.
Gas Stops, DN 50 (NPS 2) and Smaller: Bronze body with AGA stamp, plug type with bronze plug
and flat or square head, ball type with chrome-plated brass ball and lever handle; 13.8-kPa (2-psig)
minimum pressure rating.
E.
Gas Valves, DN 50 (NPS 2) and Smaller: ASME B16.33 and IAS-listed bronze body and 860-kPa
(125-psig) pressure rating.
1.
F.
Plug Valves, DN 65 (NPS 2-1/2) and Larger: ASME B16.38 and MSS SP-78 cast-iron, lubricated
plug valves, with 860-kPa (125-psig) pressure rating.
1.
G.
Tamperproof Feature: Include design for locking.
General-Duty Valves, DN 65 (NPS 2-1/2) and Larger: ASME B16.38, cast-iron body, suitable for
fuel gas service, with "WOG" indicated on valve body, and 860-kPa (125-psig) pressure rating.
1.
2.
J.
Tamperproof Feature: Include design for locking.
Gate Valves: MSS SP-70, OS&Y type with solid wedge.
Butterfly Valves: MSS SP-67, lug type with lever handle.
H.
Automatic Gas Valves: ANSI Z21.21, with mechanical operator for actuation by appliance automatic
shutoff device.
I.
Electrically Operated Gas Valves: UL 429, bronze, aluminum, or cast-iron body solenoid valve;
[120-V] [220-V] ac, 50 Hz, Class B, continuous-duty molded coil. Include NEMA ISC 6, Type 4,
coil enclosure and electrically opened and closed dual coils. Valve position shall normally be closed.
Emergency Gas Safety Shut-Off Valve With Earthquake Sensor.
1.
2.
3.
4.
5.
6.
Permits remote shut-off of fuel gas flow to kitchens.
Type: Manually opened, electrically held open, automatic closing upon power interruption.
Pneumatic operator is not permitted.
Performance: Shall shut bubbletight within 1 second after power interruption. Refer to the
drawings for pressure, flow, and valve size requirements.
Service: LP gas.
Construction: UL listed, FM approved, rated for 850 kPa (125 psi) ASME flanged ends for
pipe sizes above 50 mm, threaded ends for pipe sizes 50 mm and under. Cast steel body, open
and shut indicator. Valves for LP gas service shall be rated at 1725 kPa (250 psi).
Earthquake Sensor: UL listed, mechanical device which automatically breaks 120 Volt
electrical circuit to safety shut-off valve when earthquake occurs allowing valve to
automatically close. Valve shall close within 5 seconds after sensor is subjected to horizontal
sinusoidal oscillation having a peak acceleration of 2.94 m/sec2 (0.3G) and a period of 0.4
seconds. The valve shall not shut off when the sensor is subjected for 5 seconds to horizontal,
sinusoidal oscillations having: a peak acceleration of 3.92 m/sec2 (0.4G) with a period of 0.1
second; a peak acceleration of 0.78 m/sec2 (0.08G) with a period of 0.4 second; peak
acceleration of 0.78 m/sec2 (0.08G) with a period of 1.0 second. Sensor shall be corrosionresistant for outside location.
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2.8
GAS SHUT-OFF VALVE FOR KITCHEN EQUIPMENT
A.
Master gas control valve:
1.
B.
Control station:
1.
C.
Push-button station mounted in 2-gang box, key operated, normally open switch and a
normally closed push-button mounted in a stainless-steel faceplate for flush installation
inscribed with "GAS VALVE CONTROL" on top, "OPEN" over keyhold, "CLOSE" over
push-button, 230 V.
Relay panel:
1.
2.9
Bronze body, packless, single Buna- N seat, explosion proof, solenoid operated, normally
closed, UL listed, automatic reset, 0 psi operating pressure differential, 80-90 V DC.
Momentary contact operated relay and rectifier mounted in NEMA Type 1 enclosure, 2 pole
normally open, 3 wire control, with 230 V coil. Interconnect with the ventilator hood fire
protection system. When the hood sprinklers activate, the main gas solenoid valve shall be
closed by the flow switch located in the kitchen ventilator hood control panel.
GAS DETECTION PANEL AND DETECTORS
A.
Electronic, DDC control type flame proof, wall mounted gas detection and alarm unit with remote
gas detectors.
B.
LCD display unit, 4 channels with 3 separate alarm levels per channel. Built-in relay modules with
compatible control logic for kitchen hood fire extinguishing system, main fire alarm control panel
and BMS.
C.
Battery back-up, 230 V AC, 50 HZ, with 24 V DC built in transformer. 4 – 20 MA, output signal per
channel.
D.
Gas detectors shall be electronic type, flame and explosion proof type construction in IP 66 or IP 55
enclosures. Complete with mounting brackets. Detectors shall be compatible with Gas Detection and
Alarm Unit.
2.10
A.
SERVICE METERS
Service Meters: Positive-displacement type suitable for fuel gas service. Include metal case,
temperature compensation, corrosion-resistant internal components, and flow registered in liters per
second (cubic feet per hour); provide auxiliary contact for remote reading capability.
1.
2.
3.
4.
5.
B.
DN 50 (NPS 2) and Smaller: Threaded ends according to ASME B1.20.1 for pipe threads.
DN 65 (NPS 2-1/2) and Larger: Flanged ends according to ASME B16.5 for steel flanges.
Type: ANSI B109.1, diaphragm, with capacities 3935 mL/s (500 cfh) and less.
Type: ANSI B109.2, diaphragm, with capacities more than 3935 mL/s (500 cfh).
Type: ANSI B109.3, rotary.
Turbine Meters: Axial-flow type suitable for fuel gas service. Comply with construction criteria for
axial-flow, gas turbine meters in ASME MFC-4M. Include metal body, corrosion-resistant internal
components, and flow registered in liters per second (cubic feet per hour); provide auxiliary contact
for remote reading capability.
1.
2.
DN 50 (NPS 2) and Smaller: Threaded ends according to ASME B1.20.1 for pipe threads.
DN 65 (NPS 2-1/2) and Larger: Flanged ends according to ASME B16.5 for steel flanges.
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C.
Service-Meter Bars: Malleable- or cast-iron frame for supporting service meter. Include offset
swivel pipes, meter nuts with O-ring seal, factory- or field-installed dielectric unions, and threaded
ends complying with ASME B1.20.1.
1.
D.
2.11
A.
Service-Meter Bypass Fittings: Ferrous, tee, pipe fitting with integral ball check valve and capped
side inlet for temporary fuel gas supply.
PRESSURE REGULATORS
Description: Single stage and suitable for fuel gas service. Include steel jacket and corrosionresistant components, elevation compensator, and atmospheric vent.
1.
2.
3.
4.
5.
6.
B.
2.12
Exception: Omit meter offset swivel pipes if service-meter bar dimensions match servicemeter connections.
DN 50 (NPS 2) and Smaller: Threaded ends according to ASME B1.20.1 for pipe threads.
DN 65 (NPS 2-1/2) and Larger: Flanged ends according to ASME B16.5 for steel flanges.
Line Pressure Regulators: ANSI Z21.80 with [13.8-kPa- (2-psig-) minimum] [34.5-kPa- (5psig-) minimum] [68.9-kPa (10-psig)] inlet pressure rating.
Line Pressure Regulators: ANSI Z21.80 with 68.9-kPa (10-psig) inlet pressure rating, unless
otherwise indicated.
First Stage Regulator Valve Box Assembly: Provide first stage regulator valve, solenoid
control valve, bypass lines, pressure gauges and isolating valves as shown in the detail
drawings. First stage regulator to reduce LPG system pressure down to 20 psig. The concrete
valve box assembly to be complete with cast iron cover, steel ladder, pipe supports, and all
necessary accessories as shown on drawings
Second Stage Regulator Valve Box Assembly: Provide second stage regulator valve, solenoid
control valve, bypass lines, pressure gauges and isolating valves as shown in the detail
drawings. Second stage regulator to reduce LPG system pressure to 2 psig (for special
equipment, this value may change). The concrete valve box assembly to be complete with cast
iron cover, steel ladder, pipe supports, and all necessary accessories as shown on drawings.
Pressure Regulator Vents: Factory- or field-installed, corrosion-resistant screen in opening if not
connected to vent piping.
GAS TANK
A.
Standards: Tank shall be suitable for LPG service, designed and constructed in accordance with
ASME Code for Unfired Pressure Vessels or other approved international society and with NFPA
No. 58 requirements.
B.
Design Working Pressure: 1580 kPa.
C.
Test Pressure: 2340 kPa, at factory.
D.
Construction: Welded, fine grain, high strength, normalized steel plate of 434 MPa to 517 MPa
tensile strength and 276 MPa minimum yield strength. Tank nozzles and accessories shall be best
quality drop forged steel. Tank to be shot blasted and painted at factory with 1 coat anti-corrosion
primer and 2 coats flat white machine epoxy enamel.
E.
Valves And Accessories: Tank shall be supplied complete with the following, mounted at factory:
1.
Filler Valve: 44.5 mm male threaded ACME outlet connection, 31.8 mm male threaded
container connection, with double back check, 7 l/s filling capacity at 69 kPa differential
pressure, complete with cap, ring and chain service valve: female threaded POL outlet
connection, 20 mm male threaded inlet connection, fitted with excess flow check valve on
inlet.
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2.
3.
4.
5.
6.
7.
8.
9.
Excess Flow Check Valve: To have 20 mm female threaded outlet connection and rated
closing vapor flow of 179 standard cubic meter per hour at 689 kPa inlet pressure.
Internal Safety Relief Valve: Spring type, 32 mm male threaded container connection, 1895
kPa start to discharge setting, 105 minimum standard cubic meter per hour rated closing vapor
flow at 2070 kPa inlet pressure.
Maximum Liquid Level Gage: With 300 mm long dip tube and “stop filling” dial.
Drain Plug: With evacuating valve and excess flow check valve
Pressure gauge: range 0-20 kg/cm2.
Magnetic float gage.
Raincap: On relief valve vent pipe, size 50 mm.
Nameplate showing manufacturer, capacity, working pressure, test pressure, date of
manufacture and other necessary and pertinent data.
F.
Protection: Filler valve, service valve, and pressure gage shall have a special hood to protect them
from mechanical damage. Other components and accessories shall be protected at the factory against
damage during shipment or installation.
G.
Regulators: Tank shall be supplied complete from the factory with first and second stage regulators to
reduce pressure from 1720 kPa in tank to 500 mm water column to service piping.
H.
Regulators: To be sized for tank capacity and shall; be provided with necessary strainers and vents
and securely mounted to tank.
I.
High pressure piping between tank and regulators shall be extra strong black seamless steel.
J.
Relief valve vent pipe shall be galvanized seamless steel of same size as relief valve outlet.
K.
Sunshade: Tank shall be provided from the factory with incorporated sunshade of approved design,
with steel cradle supports welded to tank.
L.
Inspection: Welds shall be X-ray controlled. Tank shall be inspected by official, government
recognized inspectors for raw material, manufacturing operations, X-raying and final hydrostatic and
pneumatic tests. Test certificate shall be submitted with tank.
2.13
CONCRETE BASES
A.
2.14
Description: Precast, reinforced concrete base, made of 21 MPa minimum, 28 day compressive
strength concrete, and measuring 100 mm thick and 100 mm larger in each dimension than supported
item, unless otherwise indicated.
VAPORIZERS (ELECTRIC AND OR GAS OPERATED)
A.
Provide electric type vaporizers on LPG liquid outlet from LPG transfer pumps. Vaporizer capacities
shall be according to the design peak flow required. Vaporizers basic features should meet and
include but are not limited to the following:
1.
class 1, division 2, group D requirements specified in NFPA pamphlets 58 and 70.
2.
pressure vessel designed to ASME specifications
3.
UL stamped external relief valve for each core: 250 psig/17.6 kg/cm2
4.
Microprocessor based control system with digital indicator for status/problem code display.
5.
Thermal efficiency to meet or exceed 97%.
6.
Integral inlet safety solenoid valve with all operating and safety controls.
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7.
electric Automatic restart after electrical power interruption standard on class 1, Division 2, Group D
units.
8.
2.15
Explosion proof electrical configuration.
LPG OIL INTERCEPTORS
A. Provide oil interceptors at outlet from vaporizers. Capacity of the interceptor is match vaporizer flow.
Oil interceptors basic features should meet and include but are not limited to the following:
1.
Permanent filter elements to remove contaminants from LPG vapor.
2.
Designed to ASME pressure vessel code.
3.
Unit to include pressure gauges, stand and drain assembly with plug.
4.
Dual float system; first float switch for liquid level monitoring in the interceptor and the
second float shuts downs the system when the interceptor is too full.
2.16
LPG LIQUID PUMP
A. LPG pump is used to transfer LPG liquid from the gas tank to the vaporizer. LPG pump is of positive
displacement design and to be of the sliding vane type with built in over pressure relief valve. Housings
and rotors to be ductile iron. Vane and vane drivers to be of composite material compatible with LPG.
Rotor to be supported on both ends by roller bearings. Inboard mechanical seals on both sides of the
rotor are used for positive leakage control. Motor is to be explosion proof to meet class I, division 1,
group D requirements. Pumps to be equipped with constant pressure regulator, strainer, isolation
valves, bypass loops, liquid filled pressure gauges and any other components required for safe
operation. Pump characteristics are as shown on the drawings. Contractor is to submit final flow/head
calculations prior to pump selection for engineer’s approval. Obtain pumps from Alternate Energy
Systems, Inc (USA) or approved equal.
2.17
SECONDARY CONTAINMENT PIPING
A.
Belowground piping carrying fuel shall be secondarily contained, unless otherwise indicated. Piping
system shall be of double-wall construction with the internal pipe being the product pipe and the
exterior pipe being fiberglass reinforced plastic (FRP) containment pipe as defined herein.
B.
Piping system shall be a factory manufactured piping system designed in accordance with ASME
B31.3 and NFPA 30. The containment piping shall allow for complete inspection of the product
piping before the containment piping is sealed.
C.
Containment piping shall be chemically compatible with the type of fuel to be handled. Containment
piping shall be non-corrosive, dielectric, non-biodegradable, and resistant to attack from microbial
growth. Containment piping shall be capable of withstanding a minimum 35 kPa air pressure.
Containment piping shall be evenly separated from the primary pipe using pipe supports which are
designed based on pipe size, pipe and fuel weight, and operating conditions.
D.
The supports shall be constructed of the same material as the primary pipe and shall be designed so
that no point loading occurs on the primary or exterior pipe. Supports shall be permanently attached
to the product pipe either by tack welding or by an adhesive. The exterior piping and supports shall
allow for normal draining as well as the installation of any necessary leak detection equipment or
cables. Supports shall be designed and installed to allow for pipe movement of both the product
piping and the exterior piping without causing damage to either. Containment piping shall be capable
of withstanding H-20 highway loading.
2.18
GAS DETECTION SYSTEM
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A.
General:
1.
Name of the manufacturer and the serial numbers shall appear on all major components.
2.
Connection Diagrams shall be submitted showing a complete conduit and wiring layout for
the equipment to be furnished, including AWG size and type of wire, and number of
conductors and connections to the equipment.
3.
As-Built Drawings shall provide current factual information including deviations and
amendments to the drawings, and concealed and visible changes in the work.
4.
Manufacturer's Catalog Data shall be submitted for the combustible gas and oxygen deficient
atmospheres detection systems including special tools necessary for the maintenance of the
equipment. Spare parts data shall be submitted consisting of one set of fuses of each type and
size required, and a hydrogen gas calibration kit.
5.
Material, Equipment, and Fixture Lists shall include manufacturer's style or catalog numbers,
specification and drawing reference numbers, independent testing laboratory reports, and
related descriptive matter on the devices to be installed.
B.
Electromagnetic Compatibility: Electrical and electronic systems shall be designed to operate without
causing electromagnetic interference to, or malfunctioning due to electromagnetic interference from,
other systems or equipment.
C.
Control Unit
D.
1.
General Requirements: Control unit shall be 4 channel, operating over a temperature range of
0 to 51 degrees C. Each control unit shall be capable of monitoring 4 detectors. Control unit
shall be housed in a weatherproof cabinet suitable for wall mounting. Relays shall be solid
state type. Rectifiers shall be solid state type.
2.
Control Circuits: Circuits shall be solid state, with plug-in type circuit boards, in a housing
suitable for non-hazardous locations.
3.
Power Supply Component: Transformer, rectifier, resistors, charger, batteries and other
required power-supply components shall be incorporated in the control unit, or a separate
power-supply unit may be furnished and installed as approved for the application.
4.
Indicator Light and Reset: Each control unit shall have buttons for test, and indicator lights for
Power, Malfunction, and Alarm. Indicator lamps shall be color coded as follows: Power
(green), Malfunction (yellow) and Alarm (red). Zero, Alarm, and Calibration settings shall be
adjustable.
5.
Malfunction Circuits: Sensing circuits shall be monitored by individual malfunction circuits.
Open circuit shall activate malfunction light and operate relays for remote warning signal and
lights.
6.
Alarm Unit shall be arranged to operate alarm relays, activating audible and visible alarms,
and continue operation until reset by a keyed switch in the unit cabinet. Reset key shall not be
removable until conditions have returned to normal. Cabinet shall be locked by the same key
used to reset the alarm relays. Audible alarm and red rotating alarm beacon shall be provided
as indicated or directed by The Engineer.
Detectors:
1.
General: samples of detectors shall be submitted for approval.
2.
Circuit Design: Detector circuit design shall be suitable for the types and numbers of
detectors, as approved, and detector circuit current shall not exceed ratings of the individual
detectors and associated relays.
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3.
Combustible Gas Detector: Combustible gas detector shall be diffusion type catalytic sensor
in a housing suitable for the environment, and shall be intrinsically safe for use in Class I,
Division 1. Output signal shall be 4-20 mA. Operating range shall be minus 40 to 74 degrees
C.
4.
Oxygen Detector: Oxygen detector shall be a paramagnetic cell. Minimum shelf life shall be
6 months. Output signal shall be 4-20 mA. Operating range shall be 4 to 33 degrees C, 10 to
100 percent relative humidity. Measurement shall be adjustable through a range of 0 to 25
percent oxygen-in-air, and actuation level shall be set at 19.5 percent oxygen.
E.
Power Supply: Primary power supply shall be a 230-volt, 50 Hz source. An alternate source of
power, arranged to become energized automatically within at least ten seconds upon loss of normal
power, in accordance with NFPA 110 shall be provided.
F.
Control system shall be equipped with all necessary interface communication to BMS on Bacnet
protocol.
2.19
A.
2.20
WARNING TAPE
Standard, 4-Mil polyethylene 76 mm (3 inch) wide tape, non-detectable type, yellow with black
letters, and imprinted with “CAUTION BURIED GAS LINE BELOW”.
GAS SAMPLING SYSTEM
A.
System description: a sequential sampling system for detection of LPG in the different spaces. The
system shall detecs inflammable gas and oxygen in air by applying the detection principle of catalytic
combustion method and galvanic cell method respectively and transmits representative alarm by
means of relay contacts.
B.
General:
1.
Name of the manufacturer and the serial numbers shall appear on all major components.
2.
Connection Diagrams shall be submitted showing a complete conduit and wiring layout for
the equipment to be furnished, including type of wire, and number of conductors and
connections to the equipment.
3.
Record Drawings shall provide current factual information including deviations and
amendments to the drawings, and concealed and visible changes in the work.
4.
Manufacturer's Catalog Data shall be submitted for system components including special tools
necessary for the maintenance of the equipment.
5.
Material, Equipment, and Fixture Lists shall include manufacturer's style or catalog numbers,
specification and drawing reference numbers, independent testing laboratory reports, and
related descriptive matter on the devices to be installed.
C.
The system shall comprise a wall mounting weatherproof steel cabinet housing the sampling pump,
pneumatics, solenoid valves, flame arrestors & system electronics. The gas samples shall be
sequentially extracted from each monitoring point and analysed LPG. The system shall include
automatic sensing and clearing of blocked lines together with internal inflammable gas detector to
monitor inside continuously.
D.
Controller shall provide display of the gas concentration at each measuring point, with LED’s
indicating sampling and alarm status, and 3 alarm relays.
E.
Sample lines: DN 8 316SS tubing.
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F.
Detectors:
1.
General: samples of detectors shall be submitted for approval.
2.
Circuit Design: Detector circuit design shall be suitable for the types and numbers of
detectors, as approved, and detector circuit current shall not exceed ratings of the individual
detectors and associated relays.
3.
Inflammable Gas Detector: inflammable gas detector shall be Galvanic cell method type.
Measuring accuracy shall be within ±5% of full scale.
4.
Oxygen Detector: Oxygen detector shall be Catalytic combustion method type. Measuring
accuracy shall be within ±0.7% of oxygen concentration.
G.
Power Supply: Primary power supply shall be a 230-volt, 50 Hz source. An alternate source of
power, arranged to become energized automatically within at least ten seconds upon loss of normal
power shall be provided.
H.
Control system shall be equipped with all necessary interface communication to BMS on Bacnet
protocol.
PART 3 - EXECUTION
3.1
PREPARATION
A.
Close equipment shutoff valves before turning off fuel gas to premises or section of piping. Perform
leakage test as specified in "Field Quality Control" Article to determine that all equipment is turned
off in affected piping section.
B.
Comply with ANSI Z223.1, "Prevention of Accidental Ignition" Paragraph.
3.2
SERVICE-METER ASSEMBLY INSTALLATION
A.
Install service-meter assemblies aboveground [and on or supported over precast concrete bases].
Include gas valve or plug valve, [strainer,] [service pressure regulator,] [service-meter bar for
service meter with connections DN 25 (NPS 1) and smaller,] [and service meter] for each
assembly.
B.
Install gas valve or plug valve and strainer upstream from each service pressure regulator.
C.
Install service pressure regulators with vent outlet turned down and with corrosion-resistant-metal
insect screen.
D.
Install pressure gage upstream and downstream from each service pressure regulator.
E.
Install service meters downstream from service pressure regulators.
1.
2.
Service meters with connections DN 25 (NPS 1) and smaller on meter bars.
Service meters with connections larger than DN 25 (NPS 1) supported from piping or set on
concrete bases.
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3.3
SERVICE ENTRANCE PIPING
A.
Extend fuel gas piping and connect to fuel gas distribution for service entrance to building.
1.
2.
Exterior fuel gas distribution system piping, service pressure regulator, and service meter will
be provided by gas utility.
Fuel gas distribution system piping, service pressure regulator, and service meter are specified
in "Natural Gas Distribution" Section.
B.
Install dielectric fitting downstream from and adjacent to each service meter unless meter is
supported from service-meter bar with integral dielectric fitting. Install shutoff valve downstream
from and adjacent to dielectric fitting. Refer to Division 15 Section "Basic Mechanical Materials and
Methods" for dielectric fittings.
C.
Install strainer upstream from each earthquake valve.
Specialties" for strainers.
3.4
Refer to Division 15 Section "Plumbing
CONCRETE BASE INSTALLATION
A.
Locate bases at service meters and service regulators.
B.
Excavate earth and make level beds to support bases. Set bases level with top surface projecting
approximately 75 mm above grade.
3.5
PIPING APPLICATIONS
A.
Flanges, unions, transition, and special fittings with pressure ratings same as or higher than system
pressure rating may be used in applications below, unless otherwise indicated.
B.
Fuel Gas Piping: Use the following:
1.
2.
3.
(NPS 1) and Smaller: Steel pipe, malleable-iron threaded fittings, and threaded joints.
DN 32 to DN 100 (NPS 1-1/4 to NPS 4): Steel pipe, steel welding fittings, and welded joints.
Larger Than DN 100 (NPS 4): Steel pipe, steel welding fittings, and welded joints.
C.
Underground Fuel Gas Piping within the gas plant: Steel pipe, steel welding fittings, and welded
joints. Encase in containment conduit.
D.
Underground Fuel Gas Piping in the network: PE pipes with tracer wire or warning tape according to
NFPA 54 & ASTM D 2774. or black steel with polyethylene jacket.
E.
Containment Conduits: FPR piping.
F.
Gas Service Piping at Meters and Regulators, Above 34.5 kPa (5 psig): Steel pipe, steel welding
fittings, and welded joints.
3.6
VALVE APPLICATIONS
A.
Appliance Shutoff Valves for Pressure 3.45 kPa (0.5 psig) or Less: Appliance connector valve or gas
stop.
B.
Appliance Shutoff Valves for Pressure 3.45 to 13.8 kPa (0.5 to 2 psig): Gas stop or gas valve.
C.
Appliance Shutoff Valves for Pressure 13.8 to 34.5 kPa (2 to 5 psig): Gas valve.
D.
Piping Line Valves, DN 50 (NPS 2) and Smaller: Gas valve.
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E.
Piping Line Valves, DN 65 (NPS 2-1/2) and Larger: Plug valve or general-duty valve.
F.
Valves at Service Meter, DN 50 (NPS 2) and Smaller: Gas valve.
G.
Valves at Service Meter, DN 65 (NPS 2-1/2) and Larger: Plug valve.
3.7
PIPING INSTALLATION
A.
Refer to Division 15 Section "Basic Mechanical Materials and Methods" for basic piping installation
requirements.
B.
Concealed Locations: Except as specified below, install concealed gas piping in airtight containment
conduit constructed of Schedule 40, seamless, black steel pipe with welded joints. Vent conduit to
outside and terminate with screened vent cap.
1.
2.
3.
4.
5.
6.
Above-Ceiling Locations: Gas piping may be installed in accessible spaces, whether or not
such spaces are used as plenums. Do not locate valves above ceilings.
In Floors: Gas piping with welded joints and protective wrapping specified in "Protective
Coating" Article in Part 2 may be installed in floors. Surround piping cast in concrete slabs
with minimum of 40 mm of concrete. Piping may not be in physical contact with other
metallic structures such as reinforcing rods or electrically neutral conductors. Do not embed
piping in concrete slabs containing quick-set additives or cinder aggregate.
In Floor Channels: Gas piping may be installed in floor channels. Channels must have cover
and be open to space above cover for ventilation.
In Partitions: Do not install concealed piping in solid partitions.
In Walls: Gas piping with welded joints and protective wrapping specified in "Protective
Coating" Article in Part 2 may be installed in masonry walls.
Prohibited Locations: Do not install gas piping in or through circulating air ducts, clothes or
trash chutes, chimneys or gas vents (flues), ventilating ducts, or dumbwaiter or elevator shafts.
a.
C.
Exception: Accessible above-ceiling space specified above.
Drips and Sediment Traps: Install drips at points where condensate may collect. Include outlets of
service meters. Locate where readily accessible for cleaning and emptying. Do not install where
condensate would be subject to freezing.
1.
Construct drips and sediment traps using tee fitting with bottom outlet plugged or capped.
Use minimum-length nipple of 3 pipe diameters, but not less than 75 mm long, and same size
as connected pipe. Install with space between bottom of drip and floor for removal of plug or
cap.
D.
Conceal pipe installations in walls, pipe spaces, utility spaces, above ceilings, below grade or floors,
and in floor channels, unless indicated to be exposed to view.
E.
Install fuel gas piping at uniform grade of 0.1 percent slope upward toward risers.
F.
Use eccentric reducer fittings to make reductions in pipe sizes. Install fittings with level side down.
G.
Connect branch piping from top or side of horizontal piping.
H.
Install unions in pipes DN 50 (NPS 2) and smaller, adjacent to each valve, at final connection to each
piece of equipment, and elsewhere as indicated. Unions are not required on flanged devices.
I.
Install strainer on inlet of each line pressure regulator and automatic and electrically operated valve.
J.
Install pressure gage upstream and downstream from each line pressure regulator.
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K.
Install flanges on valves, specialties, and equipment having DN 65 (NPS 2-1/2) and larger
connections.
L.
Install vent piping for gas pressure regulators and gas trains, extend outside building, and vent to
atmosphere. Terminate vents with turned-down, reducing-elbow fittings with corrosion-resistant
insect screens in large end.
M.
Install containment conduits for gas piping below slabs, within building, in gastight conduits
extending minimum of 100 mm outside building, and vented to atmosphere. Terminate vents with
turned-down, reducing-elbow fittings with corrosion-resistant insect screens in large end. Prepare
and paint outside of conduits with coal-tar, epoxy-polyamide paint according to SSPC-Paint 16.
3.8
JOINT CONSTRUCTION
A.
3.9
Refer to Division 15 Section "Basic Mechanical Materials and Methods" for basic piping joint
construction.
HANGER AND SUPPORT INSTALLATION
A.
Refer to Division 15 Section "Hangers and Supports" for pipe hanger and support devices.
B.
Install hangers for horizontal steel piping with the following maximum spacing and minimum rod
sizes:
1.
2.
3.
4.
5.
3.10
DN 25 (NPS 1) and Smaller: Maximum span, 2.4 m; minimum rod size, 10 mm.
DN 32 (NPS 1-1/4): Maximum span, 2.7 m; minimum rod size, 10 mm.
DN 40 and DN 50 (NPS 1-1/2 and NPS 2): Maximum span, 2.7 m; minimum rod size,
10 mm.
DN 65 to DN 90 (NPS 2-1/2 to NPS 3-1/2): Maximum span, 3 m; minimum rod size, 13 mm.
DN 100 (NPS 4) and Larger: Maximum span, 3 m; minimum rod size, 16 mm.
CONNECTIONS
A.
Drawings indicate general arrangement of fuel gas piping, fittings, and specialties.
B.
Install piping adjacent to appliances to allow service and maintenance.
C.
Connect piping to appliances using gas with shutoff valves and unions. Install valve upstream from
and within 1800 mm of each appliance. Install union downstream from valve.
D.
Sediment Traps: Install tee fitting with capped nipple in bottom to form drip, as close as practical to
inlet of each appliance using gas.
E.
Ground equipment.
1.
2.
3.11
A.
Tighten electrical connectors and terminals according to manufacturer's published torquetightening values. If manufacturer's torque values are not indicated, use those specified in
UL 486A and UL 486B.
Do not use gas pipe as grounding electrode.
LABELING AND IDENTIFYING
Equipment Nameplates and Signs: Install engraved plastic-laminate equipment nameplate or sign on
or near each service meter, pressure regulator, and specialty valve.
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1.
2.
3.12
Text: In addition to name of identified unit, distinguish between multiple units, inform
operator of operational requirements, indicate safety and emergency precautions, and warn of
hazards and improper operations.
Refer to Division 15 Section ["Basic Mechanical Materials and Methods"] ["Mechanical
Identification"] for nameplates and signs.
PAINTING
A.
Use materials and procedures in Division 9 Section "Painting," "Exterior Paint Schedule" Article,
"Ferrous Metal" Paragraph, "Full-Gloss, Alkyd-Enamel Finish" Subparagraph.
B.
Paint exterior service meters, pressure regulators, and specialty valves.
1.
3.13
Color: Gray.
FIELD QUALITY CONTROL
A.
Inspect, test, and purge piping according to ANSI Z223.1, Part 4 "Inspection, Testing, and Purging,"
and requirements of authorities having jurisdiction.
B.
Repair leaks and defects with new materials and retest system until satisfactory results are obtained.
C.
Report test results promptly and in writing to Engineer.
D.
Verify capacities and pressure ratings of service meters, pressure regulators, valves, and specialties.
E.
Verify correct pressure settings for pressure regulators.
F.
Verify that specified piping tests are complete.
3.14
A.
3.15
A.
ADJUSTING
Adjust controls and safety devices.
devices.
Replace damaged and malfunctioning controls and safety
Interfacing with utilities SCADA system
All the above mentioned equipments and their accessories shall provide soft interface with
utilities SCADA system.
END OF SECTION 15194
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SECTION 15212 - LABORATORY AIR AND VACUUM PIPING
PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and general provisions of the Contract, including Conditions of Contract and
Division 1 Specification Sections, apply to this Section.
SUMMARY
A.
This Section includes piping and related specialties aboveground and inside the building for
the following systems:
1.
2.
3.
B.
Related Sections include the following:
1.
2.
3.
4.
1.3
Compressed air, designated "laboratory air."
Vacuum, designated "laboratory vacuum."
Laboratory gas alarm system.
Division 15 Section "Meters and Gages" for thermometers, pressure gages, and
fittings.
Division 15 Section "Mechanical Vibration Controls and Seismic Restraints" for
laboratory air manifolds and anchoring.
Division 15 Section "Laboratory Air Equipment" for laboratory air compressors and
accessories.
Division 15 Section "Laboratory Vacuum Equipment" for laboratory vacuum pumps
and accessories.
DEFINITIONS
A.
PTFE: Polytetrafluoroethylene.
B.
TFE: Tetrafluoroethylene.
1.4
SUBMITTALS
A.
Product Data: For the following:
1.
2.
3.
4.
5.
B.
Special-purpose valves.
Laboratory air and vacuum specialties.
Laboratory air manifolds.
Laboratory gas alarm system components.
Laboratory air cylinder racks.
Wiring diagrams for laboratory gas alarm system. Differentiate between manufacturerinstalled and field-installed wiring.
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