01/29/16
DESIGN NO. _____
SECTION 15510
HVAC PIPING
PART 1 - GENERAL
1.01
DESCRIPTION OF WORK
A.
1.02
Provide pipes, pipe fittings, pipe specialties, and pipe
supports as shown on the Drawings, and as needed for a
complete and proper installation.
Product specific
requirements are contained herein; Section 15501, General
Provisions for Heating, Ventilating and Air Conditioning
Work, shall be referred to for general requirements.
DESIGN AND PERFORMANCE REQUIREMENTS
A.
B.
Steam and Condensate Piping
System
High Press.
Operating
Pressure
Over 16 psig
Over
251oF.
212oF to
250oF
Design Code
(ANSI)
B31.1
B31.9
Heating Hot Water Piping
125 psig
40o - 60oF
B31.9
Condenser Water Piping
Operating Pressure
Operating Temperature
Design Code (ANSI)
NYCSCA
125 psig
150o - 250oF
B31.9
Chilled Water Piping
Operating Pressure
Operating Temperature
Design code (ANSI)
D.
0-15 psig
Operating
Temp.
Operating Pressure
Operating Temperature
Design Code (ANSI)
C.
Low Press.&
Pumped Cond.
125 psig
80o - 110oF
B31.9
HVAC PIPING 15510 - 1
01/29/16
E.
DESIGN NO. _____
Dual Temperature Water Piping
Operating Pressure
Operating Temperature
Design Code (ANSI)
F.
Refrigerant Piping
Operating Pressure
Operating Temperature
Design Code (ANSI)
G.
1
1.04
30 - 38
141.8 - 137.0
D396-86
RELATED SECTIONS
A.
Division 2 Sections
B.
Division 3 Sections
E.
Division 4 Sections
D.
Division 5 Sections
E.
Division 7 Sections
F.
Division 8 Sections
G.
Division 9 Sections
H.
Division 15 Sections
SUPPLEMENTAL SUBMITTALS
A.
Shop Drawings: Submit schedule showing pipe or tube
weight, fitting and joint type for each piping system;
size, location and feature for each piping specialty,
expansion compensation, hanger and support.
1.
NYCSCA
150 psig
40o - 120oF
B31.5
Fuel Oil Piping
Grade 2 (Distillate)
Gravity (API)
Heating Value (MBTU/gal)
Design Code (ASTM)
1.03
125 psig
40o - 250oF
B31.9
Grooved
joint
coupling
and
fitting
product
submittals shall be specifically identified with
the applicable manufacturer’s style or series
number.
HVAC PIPING 15510 - 2
01/29/16
B.
1.05
2.
Submit the underground oil piping protection system
design (cathodic protection by sacrificial anodes
or impressed current) for approval.
3.
Provide shop drawings of condensate lines showing
all diameters, pitch, cleanouts, traps, routing and
terminations.
Certifications
1.
Welding Certifications: Submit reports as required
for piping work.
2.
Brazing Certifications: Submit reports as required
for piping work.
3.
For expansion bolts installed in concrete, submit
ICC certification for use in cracked concrete.
SUPPLEMENTAL QUALITY ASSURANCE
A.
NYCSCA
DESIGN NO. _____
Codes and Standards
1.
Welding: Qualify welding procedures, welders and
operators in accordance with ASME B31.1, or ASME
B31.9, as applicable, for shop and project site
welding of piping work and ASME Boiler and Pressure
Vessel Code, Section IX, Part QW Welding or in
accordance with AWS B2.1 Specifications for Welding
Procedure and Performance Qualification per Section
MC 1203.3.6 of the 2014 NYC Mechanical Code.
2.
Certify welding of piping work using Standard
Procedure Specifications by, and welders tested
under supervision of, National Certified Pipe
Welding Bureau (NCPWB).
3.
Brazing: Certify brazing procedures, brazers, and
operations in accordance with ASME Boiler and
Pressure Vessel Code, Section IX, Part QB Brazing
for shop and job-site brazing of piping work or in
accordance with AWS B2.2 standard for Brazing
Procedure and Performance Qualification per Section
MC 1203.3.1.
4.
Fluid Control Institute (FCI) Compliance: Test and
rate "Y" type strainers in accordance with
FCI 73-1: Pressure Rating Standard for "Y" Type
Strainers. Test and rate other type strainers in
HVAC PIPING 15510 - 3
01/29/16
DESIGN NO. _____
accordance with FCI 78-1: Pressure Rating Standard
for Pipeline Strainers Other than "Y" Type.
NYCSCA
5.
EJMA Compliance: Construct expansion compensation
products in accordance with standards of the
Expansion Joint Manufacturer's Association (EJMA).
6.
Manufacturers Standardization Society of The Valve
and Fittings Industry (MSS) Compliance: Comply
with:
MSS SP-58 Pipe Hangers and Supports - Materials,
Design and Manufacture
MSS SP-69 Pipe Hangers and Supports - Selection and
Application
MSS SP-89 Pipe Hangers and Supports - Fabrication
and Installation Practices
Piping shall be supported at distances not exceeding
the spacing specified in MC Table 305.4 or in
accordance with the above MSS standards.
7.
Comply with ANSI B31.1A, ASME Code for pressure
Piping, and ASHRAE Equipment Guide.
8.
New York City Construction Codes: Comply with the
2014 New York City Building Code, Mechanical Code,
Fuel Gas Code, Plumbing Code and Fire Code.
9.
Testing of material shall be in accordance with
Section §28-113 of the NYC Administrative Code
(reference Section MC 301.5). Whenever the NYC
Construction Codes or the Rules of the Department
of Buildings requires that material be listed or
labeled and material proposed to be used is not so
listed or labeled, the use of such material shall
be subject to prior approval by the Commissioner
(Office of Technical Certification and Research
OTCR) and such material shall be used only to the
extent set forth in such approval. Materials that
were previously approved by the Board of Standards
and Appeal (BSA) or by the Department (MEA) before
the effective date of the NYC Construction Codes
may continue to be used, but only to the extent set
forth in such approval, and only if such approval
is not specifically amended or repealed by the
Commissioner.
HVAC PIPING 15510 - 4
01/29/16
DESIGN NO. _____
PART 2 - PRODUCTS
2.01
PIPES
A.
Pipe used shall be free from scale or rust. Each length
of pipe shall be properly marked at the mill for proper
identification with name or symbol of manufacturer.
Dimensions for steel pipe shall be in accordance with the
ANSI B36.10. Dimensions for red brass pipe shall be in
accordance with ASTM B251.
B.
Steel Pipe
1.
2.
Black or Galvanized; Standard Weight: Schedule 40
or Extra Heavy Weight: Schedule 80; ASTM A135 or
ASTM A53 or ASTM A106, however fuel oil lines and
diesel oil lines for equipment or tanks above the
level of the lowest floor shall only be seamless
black steel pipe ASTM A53 Grade B, Type S or ASTM
A106, Grade B, Schedule 40 with welded connections
up to the oil tank or equipment except that
fittings at the tank or equipment, shut-off valves
and other fuel oil flow and control devices may be
screwed or flanged per Section MC 1305.9.5.
a.
Steel Pipe for Threading: ASTM A53 Type F,
Type E or S; ASTM A135 or A106.
b.
Flanging: ASTM A53, Type E or S; ASTM A135 or
ASTM A106.
(Type F not permitted for
flanging).
c.
Bending and Coiling: ASTM A53, Type F, Type E
or S; ASTM A135 or ASTM A106.
d.
Grooved End Type: Schedule 40, ASTM A53, Type
F, Type E or S; or ASTM A135 or ASTM A106.
Steel pipe shall be manufactured by:
Koppel Steel Corp.
North Star Steel Co.
Sawhill Tubular Co.
Sharon Tube Co.
U.S. Steel Co.
Wheatland Tube Company
NYCSCA
HVAC PIPING 15510 - 5
01/29/16
C.
DESIGN NO. _____
Brass Pipe
1.
Semi-annealed seamless drawn; ASTM B43; 84 and 86%
copper.
2.
Brass pipe shall be manufactured by:
Anvil International
Mueller Industries
Phelps-Dodge Copper Products Corp.
Revere Copper & Brass, Inc.
Merit Brass Company.
Trenton Pipe Nipple Company
D.
Copper Tubing
1.
Hard-Drawn Temper; Water tubes shall be Type L or K
per ASTM B88; Refrigerant lines shall be ACR tube
per ASTM B280. Other refrigerant pipe and tubing
options are as defined in Section MC 1107.5. Oil
lines other than steel may be provided.
If
provided, lines shall be in accordance with MC
Table 1302.3. Oil copper or copper-alloy tubing
shall be Type K or Type L PVC Coated per ASTM B75;
ASTM B88; ASTM B280.
2.
Copper tubing shall be manufactured by:
Mueller Industries
NIBCO Inc.
Phelps-Dodge Copper Products Corp.
Revere Copper and Brass Inc.
E.
Ductile Iron Pipe
1.
Ductile iron pipe shall have an outer coating of
coal tar and shall comply with the requirements of
the latest Standard Specifications of ANSI A21.51
and AWWA C151; AWWA C115.
a.
Thickness class of pipe shall be as follows:
Water Service piping: thickness class 52 for
3” & 4” diameter pipe and thickness class 56
for pipe size greater than 4”.
b.
Ductile iron pipe shall also comply with the
following requirements:
1)
NYCSCA
Marking: the weight and class and other
designated markings required by ANSI
HVAC PIPING 15510 - 6
01/29/16
DESIGN NO. _____
specifications shall be stenciled at the
foundry on all ductile iron pipe,
fittings and specials.
Markings shall be painted conspicuously
in white on the outside of each pipe
length, fitting and special casting after
the shop coat has hardened.
2)
2.
Cement Lining: Pipe shall be cement lined
in accordance with ANSI, Standard A21.24,
with thickness of lining to be 1/8"
minimum. A plus tolerance of 1/8" shall
be permitted on all sizes of pipe.
Manufacturers
U.S.Pipe and Foundry
American Cast Iron Foundry
Amstead Industries
2.02
FITTINGS
A.
NYCSCA
Steel, Malleable/Cast Iron
1.
Steel Fittings, except couplings and unions, 21/2"
and less: Threaded pattern, standard weight, black
cast iron, suitable for a working steam pressure of
125 psi, except as otherwise specified below.
2.
Flanges, Welding Neck Type, Same Pressure Rating as
Adjoining Pipe: ANSI/ASME B16.5. Welding flanges
shall be socket type.
3.
Weld Fittings, Carbon Steel: Butt Welding Type:
ANSI/ASME B16.9: Allied Piping Products Co., Inc.’s
Branchlets, Type 1 or 2 or Bonney Forge Corp.’s
Weldolets; Socket Welding Type: ANSI/ASME B16.11
Allied Piping Products Co., Inc.’s Branchlets, Type
1 or 2 or Bonney Forge Corp.’s Thredolets or
Sockolets.
4.
Grooved End Type: Steel ASTM A53 Grade B or Ductile
iron ASTM A536 Grade 65-45-12; with factory grooved
ends designed to accept manufacturer’s couplings.
5.
Malleable Iron, Steam Pattern Threaded: ANSI/ASME
B16.3 for 150 lb Class and 300 lb Class.
HVAC PIPING 15510 - 7
01/29/16
DESIGN NO. _____
6.
Cast Iron, Steam Pattern Threaded: ANSI/ASME B16.4,
Flanged Fittings and Threaded Flanges: ANSI/ASME
B16.1 for standard weight pipe: Class 125 and for
extra heavy weight pipe: Class 250. Gray iron shall
be in accordance with ASTM A126 per MC Table
1202.5.
7.
Steel and malleable/cast iron pipe fittings shall
be manufactured by:
Anvil International
CIFUNSA Marketing, Inc.
Smith-Cooper International
Tube-Line
Victaulic Co. of America
Ward Manufacturing
Weldbend Corporation
TYCO Grinnell Mechanical Products
Shurjoint Piping Products
The Viking Corporation
B.
Brass
1.
Malleable brass, threaded pattern; flanges, brass
for use in brass pipe or copper tubing systems:
Flanges shall conform to the Standards for fittings
used in the systems.
Brazing Flanges, With or
Without Pre-inserted Rings of Brazing Alloy: ASME
B16.15, with hubs modified for brazing ends. Brass
fittings shall conform to ASTM F1974 per MC Table
1202.5.
2.
Brass Fitting shall be manufactured by:
Anvil International
Elkhart Products Corp.
Lee Brass/S. G. Flagg Co.
Mueller Industries
NIBCO Inc.
Smith-Cooper International
C.
Unions
class,
bronze
joint,
rating
1.
NYCSCA
3" Size and Under: Steel: malleable iron, 300 lb
with brass to iron or brass to brass seats and
to bronze, bronze to iron, or brass to iron ground
except as otherwise specified.
The pressure
shall be indicated on the union.
Unions for Use in Brass Pipe or Copper Tubing
Systems, 2" and under: Cast bronze, 150 lb Class,
HVAC PIPING 15510 - 8
01/29/16
DESIGN NO. _____
with bronze to bronze seats; with screw, brazing or
solder ends, or with adapters as required.
2.
Union shall be manufactured by:
Anvil International
E.M. Dart Co.
NIBCO Inc.
Smith-Cooper International
Weldbend Corporation
Ward Manufacturing LLC
The Viking Corporation
D.
Fittings for Type "L" copper tubing
1.
NYCSCA
Fittings shall be wrought copper solder joint
fittings suitable for brazing and shall be in
accordance with ANSI B16.22.
Type "L" fittings
shall have a minimum working water pressure of 150
p.s.i.
a.
Flux for brazing Type L shall be equal to
"Handy Flux" and shall comply with Navy Dept.
Spec. 51F 4a.
b.
The silver brazing alloy for brazed Type L
joints shall be similar to Handy & Harmon SilFos brazing alloy having a silver content of
not less than 15% and a flow point of 1300oF.
2.
Alternately, fittings for Type "L" copper tubing
may be cast bronze threaded fittings, Class 125
working steam pressure, conforming to ASTM B62 and
ASME B16.24.
3.
Grooved end fittings for Type “L” copper tube:
ASME B16.22 wrought copper or ASME B16.18 bronze
casting; dimensioned grooved ends designed to
accept manufacturer’s couplings.
4.
Alternately, hydronic fittings for cold and hot
water piping and chilled water piping may be press
fittings (press fit - pressure-sealed joints) by
Viega ProPress, Elkhart Xpress, NIBCO Press System,
Grinnell G-Press (or approved equal) up to and
including 4” in diameter. O-rings: EPDM; Special
Tools recommended and approved by the Manufacturer.
HVAC PIPING 15510 - 9
01/29/16
DESIGN NO. _____
5.
Type "L" fittings shall be manufactured by:
Elkhart Products Corp.
Mueller Industries
NIBCO Inc.
Smith-Cooper International
Viega ProPress
Victaulic Co.
Anvil International
TYCO Grinnell Mechanical Products
Shurjoint Piping Products
Oil lines other than steel may be provided. If provided,
lines shall be in accordance with MC Table 1302.3.
Copper tubing joints used in refrigerating systems
containing Group A2, A3, B1, B2, or B3 refrigerants shall
be brazed. Soldered joints shall not be used in such
refrigerating systems according to Section MC 1107.5.4.
E.
NYCSCA
Fittings for Ductile Iron Pipe
1.
Mechanical joints consisting of bell end with cast
flange, cast iron gland, rubber gasket and
necessary bolts and nuts shall conform to AWWA C110
and C153. Bolts shall be high-strength, low-alloy
steel with minimum 45,000 psi yield strength and
comply with AWWA C110 and C153. Unless otherwise
specified, gasket material shall be rubber.
2.
Fittings and accessories for ductile iron pipe
shall comply with the requirements of the latest
Standard Specifications of ANSI A21.10 and ANSI
A21.11. Mechanical joints shall be similar to Tyton
Joint by U.S.Pipe.
F.
Mechanically formed tee-branch outlets (refer to Section
MC 1203.3.8) may be used on aboveground copper tubing.
The mechanically formed outlet shall be by T-Drill
Industries, Inc. or approved equal. All joints formed in
this manner shall be brazed in compliance with Section
MC 1203.3.8.2 and manufacturer’s recommendations. Soft
soldered joints shall not be permitted.
G.
Couplings: Same material and pressure rating as adjoining
pipe, conforming to standards for fittings in such pipe.
Use taper tapped threaded type in screwed pipe systems
operating in excess of 15 psig.
H.
Grooved Joints - for Steel Piping: Rolled or cut grooves,
Pipe: Carbon Steel, ASTM A53, or ASTM A106, EPDM gaskets;
HVAC PIPING 15510 - 10
01/29/16
DESIGN NO. _____
Housing: Ductile Iron. System shall be designed for
flexible or rigid installation. Welded flanges shall be
used at equipment connections, and for maintenance
removal sections. Manufacturers: Victaulic, Anvil
International Inc, TYCO Grinnell Mechanical Products or
Shurjoint Piping Products
1.
2.
Rigid Type:
Housings shall be cast with
offsetting, angle-pattern bolt pads or recessed
tongue and grooves to provide system rigidity and
support and hanging in accordance with ASME B31.1
and B31.9.
a)
2” through 8”:
Rigid coupling designed for
direct installation onto grooved end pipe
without prior field disassembly and no loose
parts. Gasket shall be Grade “E” EPDM suitable
for hot water up to 230°F.
Victaulic Style
107
QuickVic,
Anvil
GRUVLOK
Fig.
7401
Rigidlok, TYCO Grinnell Figure 772, Shurjoint
Models Z07/7771 or approved equal.
b)
10” and 12”:
Standard rigid coupling with
Grade “E” EPDM gasket suitable for hot water
up to 230°F.
Victaulic Style 07 Zero-Flex,
Anvil GRUVLOK Fig. 7401 Rigidlok, TYCO
Grinnell Figure 772, Shurjoint Models Z07/7771
or approved equal.
c)
14” to 60”: Two ductile iron housing segments
with flat bolt pads for metal-to-metal contact
with wedge-shaped key profile. Grade “E” EPDM
FlushSeal gasket suitable for hot water up to
230°F.
Victaulic Style W07, Anvil GRUVLOK
Fig. 7401, TYCO Grinnell Figure 772, Shurjoint
Models Z07/771/7707L or approved equal.
Flexible Type:
Use in locations where
isolation and stress relief are required.
couplings may be used in lieu of
connectors for vibration isolation at
connections.
Three couplings for each
shall be placed in close proximity to the
vibration.
a)
NYCSCA
vibration
Flexible
flexible
equipment
connector
source of
2” through 6”: Flexible coupling designed for
direct installation onto grooved end pipe
without prior field disassembly and no loose
parts. Gasket shall be Grade “E” EPDM suitable
for hot water up to 230oF. Victaulic Style 177
HVAC PIPING 15510 - 11
01/29/16
DESIGN NO. _____
QuickVic, Anvil GRUVLOK Fig. 7001, TYCO
Grinnell
Figure
705,
Shurjoint
Models
7707/7705 or approved equal.
I.
2.03
c)
14” to 60”: Two ductile iron housing segments
with flat bolt pads for metal-to-metal contact
with wedge-shaped key profile. Grade “E” EPDM
FlushSeal gasket suitable for hot water up to
230°F.
Victaulic Style W77, TYCO Grinnell
Figure 707 Shurjoint Models 7707/7707L or
approved equal.
2” through 8”:
Coupling designed for direct
installation onto roll grooved copper tube without
prior field disassembly and no loose parts. Gasket
shall be Grade “E” EPDM suitable for hot water and
glycol system up to 230°F.
Victaulic Style 607
QuickVic, Anvil GRUVLOK CTS Fig. 6400, TYCO
Grinnell Figure 640 or 672, Shurjoint Model C305 or
approved equal.
Nipples: same material and strength as adjoining pipe,
except nipples having a length of less than 1" between
threads shall be extra heavy.
Manufacturer: Allied
Piping Products, Babcock & Wilcox, Crane Co., Tube Turns
and Smith-Cooper International.
FLEXIBLE CONNECTIONS
A.
NYCSCA
8” through 12”:
Standard flexible coupling
with Grade “E” EPDM gasket suitable for hot
water up to 230°F. Victaulic Style 77, Anvil
GRUVLOK Fig. 7001, TYCO Grinnell Figure 705,
Shurjoint Models 7707/7705 or approved equal.
Grooved Joints - for Copper Piping: Rolled grooves, EPDM
center legged gaskets, Ductile Iron housing, wrought
copper or cast bronze fittings, rated for 300 psi working
pressure.
System
shall
be
designed
for
rigid
installation. Brazed flanges must be used at equipment
connections, and for maintenance removal sections.
Manufacturers:
Victaulic,
Anvil
International
Inc/Gruvlok, TYCO Grinnell Mechanical Products or
Shurjoint Piping Products.
1.
J.
b)
Corrugated inner tube and outer shield of wire braid:
Stainless steel.
Maximum working pressure at room
temperature: 850oF and pressure safety factor of 4:1
HVAC PIPING 15510 - 12
01/29/16
DESIGN NO. _____
B.
Corrugated inner tube and outer shield of wire braid:
Bronze. Maximum working pressure at room temperature up
to 150oF. Manufacturer: Metraflex Co. or Flex-Hose Co.,
Inc.
C.
Flexible metal connectors and hoses used in fuel oil
system where rigid connections are impractical or to
reduce the effect of jarring and vibration shall be
listed and labeled in accordance with UL 536 and shall be
installed in compliance with its label and the
manufacturer’s installation instructions and shall not
exceed 18”. Connectors made from combustible materials
shall not be used inside buildings or above ground
outside of buildings. (Refer to Section MC 1302.8).
D.
Anvil GRUVLOK Fig. 7001, TYCO Grinnell Figure 705, 707,
Victaulic Style 177, 77 or W77, Shurjoint Models 7707/
7705 flexible couplings (or approved equal) may be used
in lieu of flexible connectors for vibration isolation at
equipment connections.
Three couplings, for each
connector, shall be placed in close proximity to the
source of vibration.
E.
Flexible Hose/Connections,
manufactured by:
stainless
steel
shall
be
Allied Metal Hose Inc.
Flexaust Co.
Flex-Hose Co., Inc.
Mason Industries (Type BSS)
Metraflex Co.
Wheatley Pump & Valve Inc.
2.04
GALVANIZING
A.
2.05
Galvanizing Pipe and Fittings: hot dip process, inside
and out in accordance with ASTM or other nationally
recognized specifications to which pipe and fittings
conform. Galvanize before threading.
JOINING AND SEALANT MATERIALS
A.
Solder: solid wire type conforming to type 2: 95-5
B.
Gasket Material
1.
NYCSCA
For Use with Cold Water or Chilled Water: 1/16"
thick rubber.
HVAC PIPING 15510 - 13
01/29/16
DESIGN NO. _____
2.
For Use with Hot Water, Air or Steam or Oil:
Waterproofed non-asbestos mineral, or ceramic
fiber, or spirally wound stainless steel V-shaped
strip with non-asbestos filler and an outer steel
compression ring, designed for the temperatures and
pressures of the piping systems. Mechanical joints
utilizing an elastomeric and/or compression seal
are not permitted per Section MC 1303.3.2. Fuel
oil piping flanged joints requiring gaskets or
packing shall be equipped with gaskets rated for a
minimum of 750°F per Section MC 1303.1.
C.
Bolts and Nuts: heat treated carbon steel, ASTM A183
minimum tensile 110,000 psi.
D.
Per Section MC 1303.3, joints and connections shall be
approved and of a type approved for fuel-oil and diesel
oil piping systems as follows:
1.
Brazed in accordance with ASME Boiler and Pressure
Vessel Code, Section IX Welding and Brazing
Qualifications or in accordance with American
Welding Society AWS B2.2 Standard for Brazing
Procedure and Performance Qualification or
2.
Threaded in accordance with ASME B1.20.1 or
3.
Welded in accordance with ASME Boiler
Pressure Vessel Code, Section IX Welding
Brazing Qualifications or in accordance with
B2.1 Specifications for Welding Procedure
Performance Qualification or
4.
Flanged with gaskets rated for a minimum of 750°F
per Section MC 1303.1
and
and
AWS
and
All threaded joints and connections shall be made tight
with suitable lubricant or pipe compound. Pipe joint
compounds and thread seal tape that utilize Teflon (PTFE)
shall be approved for usage on fuel oil and diesel oil
lines.
2.06
PIPING SPECIALTIES
A.
NYCSCA
Provide factory-fabricated piping specialties recommended
by manufacturer for use in service indicated.
HVAC PIPING 15510 - 14
01/29/16
B.
DESIGN NO. _____
Pipe Escutcheons
1.
2.
C.
a.
Pipe
Escutcheons
for
Moist
Areas:
For
waterproof floors and areas, where water and
condensation can be expected to accumulate,
provide cast brass or sheet brass escutcheons,
solid or split hinged. If exposed to view,
escutcheon shall be solid type.
b.
Pipe Escutcheons for Dry Areas: Provide sheet
steel escutcheons, solid or split hinged. If
exposed to view, escutcheon shall be solid
type.
Manufacturers
Zurn Industries, Inc.
McGuire Mfg. Co.
Strainers: Low Pressure Y-Type Pipeline Strainers:
1.
NYCSCA
Provide pipe escutcheons as specified herein with
inside diameter closely fitting pipe outside
diameter or outside of pipe insulation where pipe
is insulated.
Select outside diameter of
escutcheon to completely cover pipe penetration
hole in floors, walls, or ceilings; and pipe sleeve
extension, if any. Provide pipe escutcheons with
nickel or chrome finish for occupied areas, prime
paint finish for unoccupied areas.
Provide strainers full line size of connecting
piping with ends matching piping system materials.
Select strainers for 125 psi working pressure with
perforated stainless-steel basket with 50 percent
free area. Perforation or mesh size shall depend on
strainer size and/or material being strained.
a.
Threaded Ends, 21/2" and Smaller: Bronze or
Cast-iron body, screwed screen retainer with
centered blow down fitted with pipe plug.
b.
Flanged Ends, 3" and Larger: Cast-iron body,
bolted screen retainer with off-center blow
down fitted with pipe plug.
c.
Butt Welded Ends, 3" and Larger: Schedule 40
cast carbon steel body, bolted screen retainer
with off-center blow down fitted with pipe
plug.
HVAC PIPING 15510 - 15
01/29/16
DESIGN NO. _____
d.
2.
Grooved Ends, 2" and Larger: Tee or Wye Type,
ductile-iron or carbon steel body and access
end cap, access coupling with EDPM gasket. Tee
type shall be Anvil GRUVLOK Fig. 7260, TYCO
Grinnell Figure S855, Victaulic Series 730 or
W730, Shurjoint Model 728 or approved equal.
Include wye type with off-center blow down
port fitted with pipe plug, Anvil GRUVLOK Fig.
758G and 768G, TYCO Grinnell Figure S855,
Victaulic Style 732 or W732 Shurjoint Model
726 or approved equal.
Manufacturers
Anvil International
Armstrong Machine Works.
Conbraco Industries, Inc.; Apollo Valves
Hoffman Specialty ITT; Fluid Handling Div
O.C. Keckley Company
Metraflex Co.
Victaulic Co. of America
TYCO Grinnell Mechanical Products
Shurjoint Piping Products
Spirax Sarco
Mueller Steam Specialty
D.
Dielectric Unions
1.
Provide products which effectively isolate ferrous
from non-ferrous piping (electrical conductance),
prevent galvanic action, and stop corrosion. Per
Sections MC 1203.1.1 and 1303.1.1 joints between
different metallic piping materials shall be made
with
approved
dielectric
fittings
or
brass
converter fittings.
2.
Manufacturers
Mueller Industries
Capitol Mfg. Co.; Div. of Harsco Corp.
Eclipse, Inc.
Epco Sales, Inc.
Perfection Corp.
E.
Pipe Sleeves: Provide pipe sleeves of one of the
following.
Pipe sleeve must be appropriate type and
thickness for the UL firestopping assembly selected:
1.
NYCSCA
Sheet-Metal: Fabricate from galvanized sheet metal;
round tube closed with snaplock joint, welded
HVAC PIPING 15510 - 16
01/29/16
DESIGN NO. _____
spiral seams, or welded longitudinal joint.
Fabricate from the following gauges: 3" and
smaller, 20 gage minimum; 4" to 6", 16 gage; over
6", 14 gage minimum.
F.
NYCSCA
2.
Steel-Pipe: Fabricate from Schedule 40 galvanized
steel pipe; remove burrs.
3.
Iron-Pipe: Fabricate from cast-iron or ductile-iron
pipe; remove burrs.
4.
Plastic-Pipe: Fabricate from
plastic pipe; remove burrs.
5.
Firestop penetration materials for sealing sleeves
shall be listed by Underwriters Laboratories and if
not listed have MEA or OTCR approval.
The
materials shall be as specified in Section 07270.
For pipes passing through fire-rated floor, cast-in
place
firestop
device
with
Underwriters
Laboratories listing, and if not listed have MEA or
OTCR approval, is permitted as an acceptable sleeve
alternative to a metallic sleeve with firestopping
material. The cast-in place device is a one-step
firestopping
process
that
does
not
require
additional firestop penetration materials for
sealing the sleeves. The device shall be installed
where required for sleeving purposes. The cast-in
place firestop device shall not be used for wall
applications.
6.
Materials for sealing space between each pipe and
sleeve through non-rated interior walls shall
consist of mineral wool and sealant.
Schedule
80
PVC
Mechanical Sleeve Seals
1.
Modular mechanical type consisting of interlocking
synthetic rubber links shaped to continuously fill
annular space between pipe and sleeve, connected
with bolts and pressure plates which cause rubber
sealing
elements
to
expand
when
tightened,
providing watertight seal and electrical insulation
2.
Provide mechanical sleeve seals for sleeves located
in foundation walls below grade, or in exterior
walls.
HVAC PIPING 15510 - 17
01/29/16
DESIGN NO. _____
3.
Manufacturers
Thunderline Corp.; Link Seal Type "C"
Metraflex Co; MetraSeal.
G.
2.07
Drip Pans: Fabricated from corrosion-resistant sheet
metal with watertight joints, and with edges turned up
21/2". Reinforce top, either by structural angles or by
rolling top over 1/4" steel rod. Provide hole, gasket,
and flange at low point for watertight joint and 1" drain
line connection.
EXPANSION COMPENSATION
A.
Provide packless expansion joints where indicated on the
Drawings and required for piping systems, with materials
and pressure/temperature ratings selected to suit
intended service. Select packless expansion joints to
provide 200% absorption capacity of piping expansion
between anchors.
B.
Expansion Compensators
1.
2.
Pressure rated for 60 psi for low pressure systems,
175 psi for high pressure systems.
Multiple
phosphor bronze bellows, brass shrouds and end
fittings for copper piping systems, or multiple
stainless steel bellows, carbon steel shrouds and
end fittings for steel piping systems.
Provide
internal guides and anti-torque device, and
removable end clip for proper positioning.
a.
Joints for water systems shall be reinforced
rubber corrugations secured by steel flanges.
The number of corrugations shall be determined
by the amount of movement required.
b.
Joints for steam or higher temperature fluids
shall be composed of multiple layers of thin
stainless steel, corrugated and mounted
between flanges. The number of corrugations
shall be selected for the movement involved.
Manufacturer
Flex-Hose Co., Inc.
Flexonics Div.; UOP, Inc.
Mason Industries
Metraflex Co.
Victaulic Co. of America
NYCSCA
HVAC PIPING 15510 - 18
01/29/16
DESIGN NO. _____
Vibration Mountings and Controls, Inc.
C.
Rubber Expansion Joints
1.
Construct of butyl rubber with full-faced integral
flanges, internally reinforced with steel retaining
rings. Provide steel retaining rings over entire
surface of flanges, drilled to match flange bolt
holes, and provide external control rods.
2.
Manufacturer
Garlock; Mechanical Packing Div.
Metraflex Co.
Vibration Mountings and Controls, Inc.
D.
2.08
Expansion joints provided in grooved end steel piping
water systems shall be packless, gasketed, slip-type with
grooved end telescoping slip-pipe section providing up to
3” axial end movement. Install expansion joints adjacent
to an anchor or between guides. Shurjoint Models 650/651,
Anvil GRUVLOK Fig. 7240, Victaulic Style 150, Tyco
Grinnell Figure 7550 (or approved equal) or Victaulic
Style 155 expansion joints (or approved equal) consisting
of a combination of flexible couplings and grooved end
nipples joined in tandem to provide increased expansion.
Provide in water systems to 250°F in accordance with
manufacturer’s
recommendations
for
expansion
compensation.
SLIP JOINTS
A.
Provide slip joints where indicated on the Drawings and
required for piping systems, with materials and pressure/
temperature ratings selected to suit intended service.
Select slip joints to provide 200% absorption capacity of
piping expansion between anchors. Slip shall be the type
designed for repacking under pressure, with drip
connections for steam piping systems and ends to mate
with piping system.
B.
Manufacturer
Flex-Hose Co., Inc.
Flexonics Div; UOP, Inc.
Metraflex Co.
NYCSCA
HVAC PIPING 15510 - 19
01/29/16
2.09
DESIGN NO. _____
PIPE ALIGNMENT GUIDES
A.
Provide pipe alignment guides on both sides of loops,
elsewhere as required and as indicated on the Drawings.
Construct with 4 fingers spider traveling inside guiding
sleeve with provision for anchoring sleeve to structural
steel. The pipe alignment guide spider, housing, and
base must be constructed of carbon steel (painted for
rust protection).
B.
Manufacturer
Anvil International
Flex-Hose Co., Inc.
Hyspan Precision Products, Inc.
Metraflex Co.
2.10
HANGERS AND SUPPORTS
A.
NYCSCA
General
1.
Insulated Piping: Each pipe hanger supporting
insulated piping shall be provided with a pipe
covering protection shield.
2.
Hangers for pipes smaller than 5" shall be forged
or malleable iron ring type or steel clevis type
supported by a solid steel rod.
3.
Hangers for pipes 5" and larger shall be formed of
a section of steel angle having 3/4" diameter steel
rod, threaded at both ends, run through a drilled
hole near each end of the angle. Secure two nuts
at the bottom end of the rod.
Refer to Details
Drawings.
4.
Sockets used on upper ends of rods at beam clamps
and on lower ends of rods for single hangers shall
be malleable or forged steel with standard machine
threads.
5.
Supports for vertical piping shall be double bolt
riser clamps, Anvil International MSS SP 69 Type 8
with each end having equal bearing on the building
structure located as hereinafter specified.
If
piping is insulated, riser clamp shall be placed
under insulation.
6.
Trapeze type hangers shall be made of 2"x2"x1/4"
carbon steel angle iron with drilled holes and 1/2"
HVAC PIPING 15510 - 20
01/29/16
DESIGN NO. _____
hanger rods.
In lieu of an angle iron, a strut
assembly may also be used for the trapeze style
hanger supports.
B.
Pipe hangers shall be manufactured by:
Anvil International
Cooper B-Line, Inc.
Carpenter & Paterson, Inc.
F.& S. Central Mfg. Co.
Grabler Mfg. Co.
Empire Industries, Inc.
2.11
INSERTS AND EXPANSION BOLTS
A.
Inserts for use in new conventional reinforced poured
concrete slabs shall be as follows: Carpenter & Paterson
Inc. No. 650; Anvil International Fig. 281; C. H.
Leibfried Mfg. Corp. No. 100; Cooper B-Line, Inc. B2500 &
N2500 Series.
B.
Inserts for new composite metal decks shall be Powers
Fasteners “Bang-It” or Hilti, Inc. Cast-In Anchor HCI-WF
(or approved equal). Steel deck insert shall be used to
attach hanger rods.
C.
Expansion bolts for use in new and existing reinforced
concrete slabs and concrete deck shall be wedge-type
zinc-coated fastener with pull-out, tension, and shear
capacities appropriate for supported loads and building
materials where used: ITW Ramset/Red Head “Trubolt+”;
Hilti, Inc “Kwik Bolt 3”, Powers Fasteners, Inc. “Power
Stud+ SD2” or approved equal. Expansion Bolts installed
in concrete shall be in accordance with Appendix D of ACI
318 as modified by Sections 1908.1.9 and 1908.1.10 as per
Section BC 1912 of the 2014 NYC Building Code.
6
2.12
SADDLES AND SHIELDS
A.
Except as otherwise indicated on the Drawings, provide
saddles or shields under piping hangers and supports,
factory-fabricated, for all insulated piping.
Size
saddles and shields for exact fit to mate with pipe
insulation.
1.
NYCSCA
Protection Saddles: MSS Type 39; fill interior
voids
with
segments
of
insulation
matching
adjoining insulation.
HVAC PIPING 15510 - 21
01/29/16
B.
DESIGN NO. _____
2.
Protection Shields: MSS Type 40; of length
recommended by the manufacturer to prevent crushing
of insulation.
3.
Thermal Hanger Shields: Constructed of 360o insert
of high density, 100 psi, waterproofed calcium
silicate, encased in 360o sheet metal shield.
Provide assembly of same thickness as adjoining
insulation.
Manufacturers:
Elcen Metal Products Co.
Pipe Shields, Inc.
Value Engineered Products, Inc.
PART 3 - EXECUTION
3.01
3.02
NYCSCA
INSPECTION
A.
Perform flexibility analysis of the final piping
configuration as required by ANSI B31.1. Insure that the
resultant stresses are within the limits for the
respective pipe materials and that the resultant forces
and moments imposed on the anchors and guides do not
exceed the Joist and Truss Manufacturers stated
limitations.
B.
Upon completion of the flexibility analysis, notify the
Authority of additional loops, anchors or guides required
to adequately protect the piping system.
C.
Examine areas and conditions under which all products are
to be installed.
Do not proceed with work until
unsatisfactory conditions have been corrected in manner
acceptable to the Authority.
PREPARATION
A.
Proceed with installation of hangers, supports
anchors only after required building structural work
been completed. Correct inadequacies including (but
limited to) proper placement of inserts, anchors
other building structural attachments.
and
has
not
and
B.
Prior to installation of hangers, supports, anchors and
associated work, Contractor shall meet at project site
with testing agency representatives (if any), other
trades requiring coordination, the Project Architect,
HVAC PIPING 15510 - 22
01/29/16
DESIGN NO. _____
Project Engineer and the Authority Representative for
purpose of reviewing material selections and procedures.
3.03
5
NYCSCA
PIPE INSTALLATION
A.
Install pipes in accordance with recognized industry
practices which will achieve permanently-leakproof piping
systems, capable of performing each indicated service
without piping failure.
Align piping accurately at
connections, within 1/16" misalignment tolerance. Comply
with ANSI B31 Code for Pressure Piping.
B.
Locate piping runs, except as otherwise indicated,
vertically and horizontally (pitched to drain) and avoid
diagonal runs wherever possible. Orient horizontal runs
parallel with walls and column lines. Locate runs as
shown or described by diagrams, details and notations.
Run piping in shortest route which does not obstruct
usable space or block access for servicing building and
its equipment.
Hold piping close to walls, overhead
construction, columns and other structural and permanentenclosure elements of building; limit clearance to 1/2"
where furring is shown for enclosure or concealment of
piping, but allow for insulation thickness, if any.
Where possible, locate insulated piping for 1" clearance
outside insulation. All piping in finished and occupied
spaces shall be concealed from view by locating piping in
column enclosures, in hollow wall construction or above
suspended ceilings; do not encase horizontal runs in
solid partitions, except as indicated on the Drawings.
C.
Do not run piping through transformer vaults and other
electrical or electronic equipment spaces and enclosures
unless unavoidable. Install drip pan under piping that
must be run through electrical spaces. Do not run piping
in stairwells or elevator equipment rooms except for
systems serving those spaces.
D.
In the outlet from
pan, provide a tee
facilitate cleaning
single "P" trap for
E.
Riser Casings: Unless otherwise indicated on the
Drawings, all exposed risers, including the drop risers,
shall be enclosed in casings extending from floor to a
height of 7'-6" above floor.
Riser casings shall be
installed after the pipe insulation work is completed,
inspected and approved. Casings shall be made of 24-gage
galvanized sheet steel, with the upper end wired with
each cooling coil condensate drain
with a brass plug at one end to
of drain. Additionally, provide a
proper operation of the unit.
HVAC PIPING 15510 - 23
01/29/16
DESIGN NO. _____
1/8" half hard wire. Each casing shall be fastened to
the wall at the upper end with a metal band and round
head screws. Seams shall be located at the rear of the
casing.
2
2
F.
Casing for pipe at or near floors: Where pipes at or
near floors are indicated on the Drawings to be encased,
pipes shall be supported, insulated, and then enclosed in
a casing of No. 20-gage galvanized sheet steel.
G.
Protection
of
Refrigerant
Piping
Located
Inside
Buildings: As per Section MC 1107.1.1, all refrigerant
piping and fittings installed at a height less than 7’-3”
above the floor shall be concealed or otherwise protected
from mechanical damage except at the point of connection
to terminal equipment.
H.
Per Section MC 1107.2, refrigerant piping that crosses an
open space that affords passageway in any building shall
be not less than 7’-3” above the floor unless the piping
is located against the ceiling of such space. Refrigerant
piping shall not be placed in any elevator, dumbwaiter or
other shaft containing a moving object or in any shaft
that has openings to means of egress. Refrigerant piping
shall not be installed in an enclosed public stairway,
stair landing or an exit.
I.
Per Section MC 1107.2.1, refrigerant piping shall not be
installed in public corridors.
Exception: Refrigerant piping in public corridors that
complies with all of the following conditions:
NYCSCA
1.
The refrigeration system to which the piping is
associated utilizes a Group A-1 refrigerant and
contains not more than 10 pounds of refrigerant per
system, and there is not more than one system’s
refrigerant piping per tenant per public corridor;
and
2.
A complete discharge of any one refrigerant system’s
charge into the volume of the public corridor would
be insufficient to achieve 50% of the allowable
refrigerant densities set forth in MC Table 1103.1;
and
3.
Refrigerant piping and fittings within a public
corridor are installed with brazed joints or the
refrigerant equipment manufacturer provided precharged tubing systems installed in accordance with
HVAC PIPING 15510 - 24
01/29/16
DESIGN NO. _____
the
refrigerant
equipment
manufacturers
instructions. Refrigerant piping and fittings shall
be concealed or otherwise protected from mechanical
damage.
2
2
J.
Refrigerant Piping in Concrete Floors: As per Section
MC 1107.2.2, refrigerant piping installed in concrete
floors shall be encased in pipe ducts. The piping shall
be isolated and supported to prevent damaging vibration,
stress and corrosion.
K.
Refrigerant Piping Penetrations:
As per Section
MC 1107.2.3, refrigerant piping shall not penetrate
floors, ceilings or roofs.
Exceptions:
7
3.04
NYCSCA
1.
Penetrations connecting the basement and the first
floor
2.
Penetrations connecting the top floor
machinery penthouse or roof installation
4.
Penetrations connecting adjacent floors served by
the refrigeration system
5.
Penetrations by piping enclosed by gas-tight, fire
resistive duct or shaft as shown on the Drawings.
and
a
INSTALLATION OF PIPE SYSTEM JOINTS
A.
Provide joint of type indicated in each piping system.
B.
Thread pipe in accordance with ASME B1.20.1; cut threads
full and clean using sharp dies. Ream threaded ends to
remove burrs and restore full inside diameter. Apply
pipe joint compound, or pipe joint tape where recommended
by pipe/fitting manufacturer, on male threads at each
joint and tighten joint to leave not more than three
threads exposed.
C.
Weld pipe joints in accordance with recognized industry
practice and as follows:
1.
Weld pipe joints only when ambient temperature is
above 0oF where possible.
2.
Bevel pipe ends at a 37.5o angle where possible,
smooth rough cuts, and clean to remove slag, metal
particles and dirt.
HVAC PIPING 15510 - 25
01/29/16
NYCSCA
DESIGN NO. _____
3.
Use pipe clamps or tack-weld joints with 1" long
welds, 4 welds for pipe sizes to 10", 8 welds for
pipe sizes 12" to 20".
4.
Build up welds with stringer-bead pass, followed by
hot pass, followed by cover or filler pass.
Eliminate valleys at center and edges of each weld.
Weld by procedures which will ensure elimination of
unsound or unfused metal, cracks, oxidation, blowholes and non-metallic inclusions.
5.
Do not weld-out piping system imperfections by
tack-welding procedures; refabricate to comply with
requirements.
6.
Weld high-pressure piping under Special Inspection
as required by the NYC Construction Code.
D.
Brazed Joints: Joints in refrigerant piping shall be
brazed in Groups A2, A3, B1, B2, or B3 refrigerants.
Oil lines shall use brazed Type K fittings. The outside
of the copper tube and the inside of the fitting where
solder will be applied, shall be cleaned and burnished
with fine crocus cloth until all dirt and oxide is
removed.
A light coat of non-corrosive brazing flux
shall be applied to both pipe and fittings (Acid flux
shall not be used). Joint shall be uniformly heated to
proper brazing temperature and the brazing material shall
be fed to the joint until a uniform line of brazing
material appears around the pipe at the end of the
fitting. Brazing shall be done only by mechanics that
are qualified for brazing refrigerant piping.
E.
Fittings for copper tubing for refrigerant use shall be
wrought copper with solder type ends as applicable.
Forged brass fittings are also acceptable for this
purpose. Fittings shall be suitable for working water
pressure up to 250 psi. The use of cast brass fittings
for this service will not be approved
F.
Solder copper tube-and-fitting joints in accordance with
recognized industry practice. Cut tube ends squarely,
ream to full inside diameter, and clean outside of tube
ends and inside of fittings. Apply solder flux to joint
areas of both tubes and fittings. Insert tube full depth
into fitting, and solder in manner that will draw solder
full depth and circumference of joint.
Wipe excess
solder from joint before it hardens.
HVAC PIPING 15510 - 26
01/29/16
NYCSCA
DESIGN NO. _____
G.
The use of mechanical formed outlets on copper tubing
instead of soldered joints is acceptable. (Refer to
Section MC 1203.3.8).The maximum diameter of branches
shall be 21/8”. Use appropriate tool designed for
mechanical formed outlets on copper tubes. All mechanical
formed tee fittings shall be brazed in accordance with
the Copper Development Associations Copper Tube Handbook
Using BCuP series filler metal. All mechanical formed
branch collars shall be listed by UPC, and Underwriters
Laboratory. They shall comply with ASME Code for pressure
piping ANSI B31.5c.
H.
Offsets in piping shall be accomplished by means of
standard fittings; pipe bends shall not be used for this
purpose unless shown on the Drawings or unless permission
is obtained from the Authority to use pipe bends.
I.
Flanged Joints: match flanges within piping system, and
at connections with valves and equipment. Clean flange
faces and install gaskets. Tighten bolts to provide
uniform compression of gaskets.
J.
The "Y" fitting in the vacuum pump discharge piping and
all fittings in the fuel oil piping within the building
shall be of malleable iron.
K.
Eccentric Fittings: reductions in sizes of steam mains
and hot and/or chilled water mains shall be made with
eccentric fittings. To avoid trapping of condensate or
air in mains at eccentric reducers, install steam piping
eccentric reducers with the offset to the bottom of the
run, and install water piping eccentric reducers with the
offset to the top of the run.
L.
Reducing Fittings: except for welded piping, no fittings
shall be taped for drip except in boss provided for that
purpose. Reducing fittings shall be used where drips are
required.
M.
Unions shall be used in piping only adjacent to units of
equipment such as pumps, oil burners, compressors,
heating coils, cooling coils and all other items and
accessories, or in other locations where specified, where
shown on the Drawings, or where written permission is
granted prior to installation.
N.
Mechanical Couplings Type Fittings: The use of mechanical
coupling type fittings on hot and cold water piping in
lieu of threaded or flanged fittings is acceptable in
sizes 2" to 8" inclusive. The mechanical couplings shall
HVAC PIPING 15510 - 27
01/29/16
DESIGN NO. _____
be self-centering and shall engage and lock the grooved
pipe and/or fittings in a positive couple while allowing
for some degree of angular pipe deflection, contraction
and expansion. Entire coupling installation including
pipe grooving shall be performed in accordance with the
manufacturer's
instructions.
Mechanical
Products
couplings together with their respective grooved end pipe
fittings are acceptable.
NYCSCA
1.
The gasket style and elastomeric material (grade)
shall be verified as suitable for the intended
service as specified.
2.
Grooved end shall be clean and free from
indentations, projections, and roll marks in the
area from pipe end to groove for proper gasket
sealing.
3.
A manufacturer factory-trained field representative
shall provide on-site training for contractor's
field personnel in the proper use of grooving tools
and installation of grooved piping products.
Factory-trained representative shall periodically
review the product installation. Contractor shall
remove and replace any improperly installed
products.
O.
Grooved Copper coupling may be used in lieu of soldering
joints on 2" and up Type L copper tubing; on water
services from -30oF to +250oF within the manufacturer
rated working pressures. Tubing shall be roll grooved as
per manufacturer.
P.
Pressed Connect Fit (Pressure Seal - Press Fit) Fittings:
All the connections shall be made in accordance with the
manufacturer’s installation instructions. Copper tubing
shall be cut at right angles using displacement type
cutter or fine-toothed saw. Burrs shall be removed from
inside and outside of tubing to prevent cutting sealing
element. Mark insertion depth according to manufacturer’s
insertion depth chart. Seals and grip ring shall be
checked for correct fit. Only the manufacturer’s sealing
elements shall be used. Press fitting shall be slid onto
tubing while turning slightly to the marked depth. Oils
or lubricants shall not be used. Fitting connections
shall be made with the tool provided by manufacturer.
Manufacturer’s assembly tool shall be used to perform the
pressing process.
HVAC PIPING 15510 - 28
01/29/16
DESIGN NO. _____
For locations where there is insufficient access to
accommodate the pressing tool, this type of joint is not
allowed. Sufficient clearance must be left around each
joint to allow room for the pressing tool and jaw to be
attached without interference when repairing the system
in the future.
3.05
INSTALLATION OF FLEXIBLE CONNECTIONS
A.
3.06
3.07
PIPING TESTS
A.
For operational and hydrostatic tests, refer to Section
15992: Cleaning and Testing.
B.
Where piping installed under this project is connected to
any existing system, such installed piping shall be
isolated from the existing system during the performance
of the required tests.
INSTALLATION OF PIPING SPECIALTIES
A.
Pipe Escutcheons: Install pipe escutcheons on each pipe
penetration through floors, walls, partitions, and
ceilings where penetration is exposed to view; and on
exterior of building.
Secure escutcheon to pipe or
insulation so escutcheon covers penetration hole, and is
flush with adjoining surface.
B.
Strainers
8
NYCSCA
Install stainless steel type on the water line at the
circulating pumps and on the chilled water lines; and
bronze type on the refrigerant line. Pipe system must be
properly supported so as not to impose weight on the
connectors which would compress the hose and relax the
braid tension.
Avoid torque.
Do not twist the hose
assembly during installation when aligning bolt holes in
a flange or in mating-up the pipe threads.
1.
Provide pipe nipple and shutoff valve in strainer
blow down connection, full size of connection,
except for strainers 2" and smaller installed ahead
of control valves feeding individual terminals.
Where indicated, provide drain line from shutoff
valve to plumbing drain, full size of blow down
connection.
2.
Provide strainers in supply line ahead of the
following equipment and elsewhere as indicated (if
control valve selected comes with an integral
HVAC PIPING 15510 - 29
01/29/16
DESIGN NO. _____
strainer in the assembly, a separate strainer does
not need to be installed):
Pumps
Steam traps serving steam main drips
Temperature control valves
Pressure reducing valves
Temperature or pressure regulating valves
C.
Dielectric Unions: Per Sections MC 1203.1.1 and 1303.1.1,
joints between different ferrous and non-ferrous metallic
piping materials shall be made with approved dielectric
fittings or brass converter fittings.
D.
Pipe Sleeves
1.
2.
NYCSCA
Install pipe sleeves where piping passes through
walls, floors, ceilings, and roofs. Do not install
sleeves through structural members of work, except
as detailed on the Drawings or as reviewed by the
Project Architect.
Install sleeves accurately
centered on pipe runs. Size sleeves so that piping
and insulation (if any) will have free movement in
sleeve, including allowance for thermal expansion;
but not less than 2 pipe sizes larger than piping
run.
Where insulation includes vapor-barrier
jacket, provide sleeve with sufficient clearance
for installation. Install length of sleeve equal
to thickness of construction penetrated, and finish
flush to surface; except floor sleeves.
Extend
floor sleeves 1/4" above level floor finish, and
3/4" above floor finish sloped to drain.
a.
Install sheet-metal sleeves at interior
partitions and ceilings other than suspended
ceilings.
b.
Install
iron-pipe
sleeves
at
exterior
penetrations, both above and below grade.
c.
Install steel-pipe or plastic-pipe
where indicated on the Drawings.
sleeves
Sleeves for floors, walls and other masonry work
shall be set in place before the slabs or walls are
constructed.
In buildings having floor slab of
composite metal deck construction, Contractor shall
be responsible for cutting holes in the steel deck.
Where drilled openings are in terra cotta arch,
exposed hollow core of the blocks shall be
HVAC PIPING 15510 - 30
01/29/16
DESIGN NO. _____
completely filled with non-shrink grout and
prepacked to achieve firm bearing on the entire
perimeter of the structural steel sleeve. Where
corrugated sheet metal is encountered, it shall be
cut by the rotary drill used to cut the arch. For
location of sleeve, Contractor is to coordinate
with new and existing Drawings (Structural steel
beams are shown on original Drawings). Openings in
arch must be located to miss existing structural
steel. Openings in existing arch are to be made by
rotary core drill only. Hammering of any type is
not permitted. The size of the opening in arch may
not exceed the requirement shown on the Details
Drawings. The mix for non-shrink grout shall be in
accordance with the manufacturer's recommendations.
The non-shrink grout shall be compacted to provide
firm bearing between the structural steel sleeve or
sleeves and the existing arch. Additionally, where
there are two sleeves, provide compacted non-shrink
grout between the sleeves.
E.
Mechanical Sleeve Seals: Mechanical modular seals may be
used in lieu of packing and sealant for sleeves and core
drilled holes. Loosely assemble rubber links around pipe
with bolts and pressure plates located under each bolt
head and nut.
Push into sleeve and center.
Tighten
bolts until links have expanded to form watertight seal.
Use fire protective seals where required. Size annular
space as required for seal installation.
F.
Fire Barrier Penetration Seals: refer to Section 07270 Firestopping.
G.
Drip Pans: locate drip pans under piping passing over or
within 3 feet of electrical equipment, and elsewhere as
indicated. Hang from structure with rods and building
attachments, weld rods to side of drip pan. Brace to
prevent sagging or swaying. Connect 1" drain line to
drain connection, and run to nearest plumbing drain or
elsewhere as indicated on Drawings.
3.08 INSTALLATION OF EXPANSION COMPENSATION
A.
NYCSCA
Expansion joints: Install expansion joint as determined
for adequate expansion of installed piping system.
Provide pipe anchors and pipe alignment guides in
accordance with manufacturer's recommendations. Align
units properly to avoid end loading and torsional stress.
HVAC PIPING 15510 - 31
01/29/16
3.09
3.10
NYCSCA
DESIGN NO. _____
B.
Expansion loops: Fabricate expansion loops as determined
for adequate expansion of installed piping system.
Subject loop to cold spring that will absorb 50% of total
expansion between hot and cold conditions. Provide pipe
anchors and pipe alignment guides as determined to
properly anchor piping in relationship to expansion
loops.
C.
Expansion compensation for risers and terminals: If not
indicated on the Drawings, install connection between
piping mains and risers with at least 5 pipe fittings
including tee in main, install connections between piping
risers and terminal units with at least 4 pipe fittings
including tee in riser.
MISCELLANEOUS CONNECTIONS
A.
For steel piping runouts not detailed on the Drawings,
use three elbow connections between runouts and mains.
B.
Connections to Equipment: provide three elbow runouts to
all rotating equipment such as pumps and chillers.
Provide swing connections for boilers. Provide two elbow
connections to fuel oil tanks.
C.
Connections to Building Structure: connect to trusses and
joints at panel points.
Provide supplementary steel
framing at panel points to transfer loads to framing.
D.
Connection to domestic water system shall be protected by
reduced pressure principal backflow preventer.
INSTALLATION OF SUPPORTS AND ANCHORS
A.
Provide all necessary pipe hanger material needed to
safely and securely support or hang all piping. Pipe
hanger loads shall be determined by accurate weight
balance calculations to prevent transferring loads and
forces to any equipment and terminal connections. Per
Section MC 305.4, piping shall be supported at distances
not exceeding the spacing specified in MC Table 305.4 or
in accordance with MSS SP-69.
B.
Install building attachments at required locations within
concrete or on structural steel for proper piping
support.
Hangers and anchors shall be attached to
building structure per Section MC 305.3.
Space
attachments within maximum piping span length indicated
in MSS SP-69 and MSS SP-89 and MC Table 305.4. Install
additional concentrated loads at valves, flanges, guides,
HVAC PIPING 15510 - 32
01/29/16
DESIGN NO. _____
strainers, expansion joints, and changes in direction of
piping.
Install concrete inserts before concrete is
poured; fasten insert securely to forms. Where concrete
with compressive strength less than 2500 psi is
indicated, install reinforcing bars through openings at
top of inserts. For composite metal decks, inserts shall
be of the type that is supported entirely by the concrete
slab, not by the metal deck. Install expansion bolts
after erection of the metal deck, after concrete is
placed and completely cured in accordance with the bolts
manufacturer's
written
installation
instructions.
Expansion bolts shall be installed so that the load acts
on the bolts in shear and withdrawal. Expansion bolts
shall be carefully located in order to eliminate the risk
of damage to concrete, steel reinforcement, electrical
conduits and any other embedded items.
C.
Install hangers, supports, clamps and attachments to
support piping properly from building structure per
Section MC 305.3. Arrange for grouping of parallel runs
of horizontal piping to be supported together on trapeze
type hangers where possible.
Install supports with
maximum spacings complying with MSS SP-69 and MSS SP-89
and MC Table 305.4. Where piping of various sizes is to
be supported together by trapeze hangers, space hangers
for smallest pipe size or install intermediate supports
for smaller diameter pipe. Do not use wire or perforated
metal to support piping, and do not support piping from
other piping.
D.
Install hangers and supports complete with necessary
inserts, bolts, rods, nuts, washers and all other items
and accessories.
Except as otherwise indicated for
exposed continuous pipe runs, install hangers and
supports of same type and style as installed for adjacent
similar piping.
E.
Prevent electrolysis in support of copper tubing by use
of hangers and supports which are copper plated or by
other recognized industry methods.
F.
Provisions for Movement
1.
NYCSCA
Install hangers and supports to allow controlled
movement of piping systems, to permit freedom of
movement between pipe anchors and to facilitate
action of expansion joints, expansion loops,
expansion bends and similar units.
HVAC PIPING 15510 - 33
01/29/16
G.
H.
NYCSCA
DESIGN NO. _____
2.
Load Distribution: Install hangers and supports so
that piping live and dead loading and stresses from
movement will not be transmitted to connected
equipment.
3.
Pipe Slopes: Install hangers and supports to
provide indicated pipe slopes and so that maximum
pipe deflections allowed by ANSI B31 Pressure
Piping Codes are not exceeded.
Pipe Supports
1.
Mains located near floors shall be supported on
roller type pipe stands bedded in cement base.
When mains are installed before concrete floor is
laid, the mains shall be supported from overhead
construction until the pipe stands can be put in
place.
2.
Horizontal piping connections (near floor) to
convectors and all other items and accessories
located more than 4' from risers shall be supported
on adjustable iron pipe stands. Pipe stand shall
consist of a split ring extension hanger mounted on
a hanger flange, which shall be secured to the
floor.
Insulated Piping: Comply with the following installation
requirements.
1.
Clamps: Attach clamps, including spacers (if any),
to
piping
with
clamps
projecting
through
insulation; do not exceed pipe stresses allowed by
ANSI B31.
2.
Shields: Where low-compressive-strength insulation
or vapor barriers are indicated on chilled water
piping, install coated protective shields.
For
pipe 8" and over, install wood insulation saddles.
3.
Saddles: Where insulation without vapor barrier is
indicated, install protection saddles.
4.
Insulation Saddle System, the equal of Anvil Fig
260 ISS can be used instead of shields and/or
saddles when proper insulating techniques are
employed including the use of mastic and caulk on
all insulation edges and final taping.
Position
the pipe on the saddle, notch section of the
insulation to fit around the saddle, square cut the
HVAC PIPING 15510 - 34
01/29/16
DESIGN NO. _____
adjoining insulation section and butt the mating
end to the notched section, finish taping according
to standard methods, no metal shield is required
between the hanger and pipe insulation.
3.11
I.
Install anchors at proper locations to prevent stresses
from exceeding those permitted by ANSI B31 and to prevent
transfer of loading and stresses to connected equipment.
J.
Fabricate and install anchor by welding steel shapes
plates and bars to piping and to structure. Comply with
AWS standards.
K.
Where expansion compensators are indicated, install
anchors in accordance with expansion unit manufacturer's
written instructions and to limit movement of piping and
forces to maximum recommended by manufacturer for each
unit.
L.
Anchor Spacings: where not otherwise indicated, install
anchors at ends of principal pipe-runs, at intermediate
points in pipe-runs between expansion loops and bends.
Make provisions for preset of anchors as required to
accommodate both expansion and contraction of piping.
M.
Piping passing under concrete areas shall be supported by
hangers secured by means of beam clamps fastened to the
beams. Where pipe support spacing is excessive between
steel, beam clamps shall be fastened to structural
members that are approved by the Authority.
Removed
fireproofing around beams shall be replaced to original
condition. No hangers or supports shall be attached to
hung ceilings, concrete, ductwork or work of other
trades.
N.
The refrigerant piping above the roof slab shall be
supported in a galvanized sheet steel enclosure
constructed in accordance with the Detail shown on the
Drawings. The cover of the enclosure shall be held in
place with stainless steel sheet metal screws on 18"
centers. The base of the enclosure shall be secured to
the angle uprights with 1/4" bolts, washers and nuts.
O.
Hangers and supports for refrigerant piping shall be
copper plated, malleable iron or carbon steel.
CLEANING, FLUSHING, INSPECTING
A.
NYCSCA
Clean exterior surfaces of superfluous materials, and
prepare for application of specified coatings (if any).
HVAC PIPING 15510 - 35
01/29/16
DESIGN NO. _____
Flush out piping systems with clean water before
proceeding with required tests. Inspect each run of each
system for completion of joints, supports and accessory
items.
Inspect pressure piping in accordance with
procedures of ASME B31.
3.12
B.
Hanger Adjustments: adjust hangers so as to distribute
loads equally on attachments.
C.
Support Adjustment: provide grout under supports so as to
bring piping and equipment to proper level and
elevations.
PAINTING
A.
3.13
PIPE APPLICATION
A.
B.
NYCSCA
Upon completion of the installation, remove all
protecting materials, all scale and grease and leave in a
clean condition for painting.
Boiler Piping
1.
Each boiler shall be connected with steam, feed
water, city water (quick fill), blow-off, water
equalizing, trimming, and accessories piping as
shown on the Drawings and as specified. Refer to
the Drawings Details. The steam header may be made
with screwed fittings or fabricated by welding at
the shop with welding fittings.
2.
Provide water supply to fill the boilers with City
water as shown on the Drawings.
Mains
1.
Steam Mains: Pitch horizontal steam piping in the
direction of steam flow, excepting the runouts to
risers and other piping which the Drawings indicate
is to be pitched against the flow. Piping shall be
hung at the elevations given on the Drawings.
Where the elevations are not indicated, install
piping approximately 12" below the overhead beams.
In boiler, fan and equipment rooms, provide piping
so as to give easy access to valves.
2.
Return Mains: Return mains shall be run in the
locations shown on the Drawings. Return mains on
floors or in trenches shall not be installed until
floors have been laid, unless otherwise directed.
HVAC PIPING 15510 - 36
01/29/16
DESIGN NO. _____
Such return piping shall be painted immediately
after erection.
Outlets of return piping in
trenches, and at or near floor shall be plugged or
capped until connecting piping has been installed.
C.
D.
NYCSCA
3.
Low Points: Low points of each seal or pocket in
piping shall be provided with a 1/2" (minimum size)
gate valve arranged to empty the line.
4.
Water Piping:
Piping shall be installed at the
elevations and locations indicated on the Drawings.
It shall be so supported as to avoid the trapping
of air. However, where trapping of air cannot be
avoided, provision shall be made for manual venting
of piping in such locations. Each low point in a
main shall be provided with a 1" bronze hose gate
valve, having a bronze cap and chain on the outlet.
5.
Condensate Drain Piping: Condensate drain piping
from cooling coil drain pans shall be pitched at
not less than one-eighth unit vertical in 12 units
horizontal (1-percent slope) in the direction of
discharge per Section MC 307.2.1.
Runouts
1.
Runouts from steam mains for risers, convectors,
and all other items and accessories shall be taken
from top of steam main on a rise of 45o and shall be
pitched toward the main, unless otherwise shown on
the Drawings.
2.
Runouts from return mains for risers, convectors,
and all other items and accessories shall be taken
from the side of horizontal return main and shall
be pitched toward the main, unless otherwise shown
on the Drawings.
Risers: Steam and return risers shall be installed in the
locations indicated on the Drawings. They shall be of
the sizes marked on the Riser Schedule or Sheet. Where
the distance between fittings is less than 18', no
couplings shall be used in the riser. Risers shall be
supported and anchored at the first floor of a 3-story
building, and at the second floor of a 4-story building.
Risers, connections to convectors, traps, and all other
items and accessories shall be neatly arranged and shall
allow for expansion.
HVAC PIPING 15510 - 37
01/29/16
E.
F.
NYCSCA
DESIGN NO. _____
Drips, Test Connections
1.
Drips shall be provided to keep horizontal steam
piping free of condensation.
They shall be
connected from steam mains, branches at locations
indicated on the Drawings, through traps to return
mains as per Drawings Details.
Each trap in a
steam main drip shall have a strainer and a full
size valved by-pass.
Drips not shown on the
Drawings, but made necessary by job conditions,
shall be provided as directed, as part of the
Contract.
2.
Provide plugged tees for steam pressure and vacuum
test connections in the locations indicated on the
Drawings. Test connections shall be as shown in
the Drawings Details.
Vacuum Heating Pump Connections
1.
Condensate return piping from direct radiation,
heating coils, drips, and all other items and
accessories shall be connected into a vacuum
heating pump suction header, unless otherwise shown
on the Drawings.
Suction header shall be
constructed of pipe, flanges, welding fittings in
accordance with the Drawings Details.
2.
Vacuum pump
respects.
arranged so
duties when
installation shall be complete in all
Piping, valves, connections shall be
that the pumping units will perform the
operating simultaneously or separately.
G.
Steam Convector Connections: Provide schedule 40 black
steel pipe connection to steam convectors. Supply shall
be provided with a gate valve, and a pneumatic steam
control valve and return with a thermostatic trap, three
elbow swing joint, and gate valve. Refer to the Standard
Details.
H.
Piping for Oil Burning Equipment
1.
Pipe shall be pitched in the direction indicated on
the Drawings, at least 1" in 10', unless otherwise
shown.
2.
Fill Pipe: Provide fill pipe, of size shown on
Drawings for each tank (for No.2 oil, fill piping
shall be a minimum of 2” in diameter per Section
MC 1305.6.1). Fill pipes shall pitch toward tanks,
HVAC PIPING 15510 - 38
01/29/16
DESIGN NO. _____
shall be connected into tapping on tanks, and shall
be extended to fill pipe terminals near the
sidewalk curb, or otherwise shown on the Drawings.
A fill pipe shall terminate outside of a building
at or above grade at a point at least two feet from
any building opening and 5 feet away from any
subway grating at the same or lower level per
Section MC 1305.6.2.
NYCSCA
3.
Vent Pipe: A vent pipe of size indicated on the
Drawings shall be connected to the vent pipe
tapping on each tank and extended to a vent head.
Vent pipe shall pitch toward tank and shall be
supported as indicated on the Drawings.
4.
Suction Lines: Suction lines shall be connected to
the tappings provided on top of the tanks and
extended into the tanks as shown on the Drawings.
Overhead lines shall be pitched toward the tanks.
5.
Pump
Connections:
Provide
suction
piping
connections to the pump as indicated on the
Drawings. Include an OS&Y valve in each suction
line.
6.
Fuel Oil Piping from transfer pump to equipment or
to storage tanks above the lowest floor (Refer to
Section MC 1305.9).
a.
Fuel Oil Piping shall be enclosed in a shaft
constructed of 4” concrete or masonry having a
4” clearance from all pipe or pipe covering,
except that no such enclosures shall be
required within the room containing the pump,
tank, or equipment where such room is itself
enclosed with construction and materials
having at least a two hour fire resistance
rating.
Provisions shall be made for
expansion in piping without the use of
expansion
joints
(Refer
to
Section
MC
1305.9.6).
b.
Where it is necessary to make horizontal
offsets in the supply piping, overflow/return
piping and pipe shafts including the lowest
level such piping shall be enclosed in a
sleeve of other piping of at least no. 10 U.S.
standard gage steel, two sizes larger and
arranged to drain into the shaft. Horizontal
piping offsets shall be further enclosed in
HVAC PIPING 15510 - 39
01/29/16
DESIGN NO. _____
construction having a two hour fire resistance
rating, except that no such enclosure or pipe
sleeve shall be required for the pipes serving
the equipment within the room containing the
pump, tank, or equipment where such room is
itself
enclosed
with
construction
and
materials having at lease a two hour fire
resistance rating.
Horizontal piping shall
include all piping at or above the roof
level.
No 2-hour fire-resistance rated
enclosure is required for horizontal piping
offsets located outside the building.
NYCSCA
c.
A drain pipe shall be installed at the base of
shafts
enclosing
the
supply
and
overflow/return piping. The pipe shall lead to
a dedicated sump or minimum 55 gallon (208 L)
container with a leak detection alarm,
arranged so as to sound an alarm and stop the
transfer pump. The alarm shall be connected to
a local audible alarm and to a remote alarm
located at a supervising station. The wiring
shall comply with the New York City Electrical
Code. (Refer to Section MC 1305.9.4).
d.
Oil lines for equipment or tanks above the
level of the lowest floor shall be black steel
pipe ASTM A53 or A106, Grade B seamless,
schedule 40 with welded connections up to the
oil tank or equipment, except that fittings at
the tank or equipment, shut off valves and
other fuel oil flow and control devices may be
screwed or flanged.
e.
Pipe shafts shall not be penetrated by or
contain other piping or ducts. (Refer to
Section MC 1305.9.2).
f.
The piping shall be located and secured from
movement so as to prevent undue stress on the
piping and to isolate the piping from
vibrations from any equipment. (Refer to
Section MC 1305.9.7).
g.
Pipe connections to the main header (supply or
return) shall be made from the top of the
header, except for systems with equipment
above the lowest floor where such equipment is
designed to operate utilizing fuel pumped as
HVAC PIPING 15510 - 40
01/29/16
DESIGN NO. _____
needed from the lowest floor and without
utilizing fuel oil stored above the lowest
floor. (Refer to Section MC 1305.9.8).
NYCSCA
h.
In systems with equipment above the lowest
floor where such equipment is designed to
operate utilizing fuel stored above the lowest
floor, piping diameters shall not exceed 4”.
However, where the Engineer of Record requires
a greater diameter to ensure the proper flow
for the functioning of the system, such
greater diameter may be permitted by NYCDOB.
Piping shall not be used for fuel storage
purposes. (Refer to Section MC 1305.9.11).
i.
Per Section MC 1305.9.12: In systems with
equipment above the lowest floor, where such
equipment is designed to operate utilizing
fuel pumped as needed from the lowest floor
and without utilizing fuel oil stored above
the lowest floor, piping diameters throughout
such systems shall not exceed the design flow
(three times the maximum firing rate as
calculated by the engineer or architect).
However,
piping
diameters
within
rooms
containing such equipment may exceed the
calculated design flow pipe size to provide
limited reservoir storage to prime equipment,
provided such reservoir storage is counted
toward the maximum permitted oil storage per
story as provided for in Article 1305.11.1.3
of the NYCMC (330 gallons maximum fuel oil
above the lowest floor inside of a building).
j.
All air vents and vacuum breakers shall be
hard piped to a curb or pan as provided for in
Section MC 1305.9.10.
7.
Fuel Oil Gauge Piping shall be copper material,
Type L, ASTM B88. Protective enclosure piping, if
required for Fuel Oil Gauge Piping shall be black
steel Schedule 40.
8.
Gas Piping: Provide a gas supply service connection
for burner ignition and pilot to each oil burner.
All gas connections shall be installed by a
Licensed Plumber.
HVAC PIPING 15510 - 41
01/29/16
I.
NYCSCA
DESIGN NO. _____
Air Piping for Temperature Control
1.
Provide piping required for the temperature control
systems.
Piping shall be concealed wherever
practicable, supported and anchored to prevent
vibration and damage. No air lines shall be hidden
within insulation. Exposed piping passing through
floors, walls and all other penetration shall have
neatly fitted cast aluminum or cast brass
escutcheon plates.
Sizes given in the following
paragraphs are for copper tubing and are the
nominal minimum sizes acceptable. It shall be the
responsibility
of
the
temperature
control
manufacturer to size all piping (above the minimum
sizes specified) to insure proper operation of the
entire temperature control installation.
The
number of mains and risers installed shall be
determined by the temperature control manufacturer
and shall be governed by the configuration of the
building.
It is the intent to provide a
temperature control system that divides the
building into several areas of control which may be
conveniently isolated for future maintenance and
repair.
All joints in copper tubing shall be
soldered
connections
except
for
compression
fittings where connecting to instruments and
operators.
2.
Air Distributing Header: Provide air distributing
header in the vicinity of pressure reducing
station.
Header and piping of pressure reducing
station shall be made of brass pipe nipples with
brass fittings. The use of type K copper tubing
with brass or copper solder joint fittings is also
acceptable for this purpose.
Outlets of header
shall be connected with the air mains, each of
which shall be provided with a valve (or plug cock)
at this location.
3.
Air Mains: Provide air mains near the ceiling of
the basement (or cellar, pipe and duct space, and
all other items and accessories). Mains shall be
1/2" nominal minimum size.
Each main shall be
provided with a drain cock at its low point.
4.
Air Risers: Air risers shall not be run near
heating risers. Each riser shall drain to the main
and be provided with a valve and with a pressure
gauge close to the main.
Risers shall be 3/8"
nominal minimum size, except that a riser serving a
HVAC PIPING 15510 - 42
01/29/16
DESIGN NO. _____
fan or equipment room shall be 1/2" nominal minimum
size. At least one riser shall be provided to serve
each floor area. (e.g. A three story area shall
have at least three risers).
J.
K.
5.
Air piping (copper tubing) installed in finished
spaces on partitions which do not have a plaster
finish shall be enclosed in a surface metal raceway
as defined in Section 16130, Raceways, Fittings,
Supporting Devices, Boxes and Accessories.
6.
Valve Tags: Each valve and plug cock shall be
provided with a valve tag as specified in Section
15502: HVAC Identification.
Steam Piping Systems
1.
Install to permit complete drainage.
2.
Pitch:
Pitch horizontal steam mains, return mains and
branches downward, 1/4" per 10' in direction
of flow.
b.
Pitch steam runouts and connections to risers
upward, 3/16" per foot in direction of flow.
3.
Use eccentric reducers in horizontal piping.
4.
Size short vertical supply and return connections,
from horizontal runouts to radiator traps and
valves, same size as trap or valve.
Water and Propylene Glycol Piping Systems
1.
Pitch: Pitch horizontal piping 1/8" per 10'
direction indicated on Drawings. When direction
flow is not indicated, pitch supply piping up
direction of flow and return piping downward
direction of flow.
2.
Air Vents: Install air vents at locations indicated
on the Drawings, and at each high point in system.
Use manual air vents, unless otherwise indicated.
3.
Drains: Provide drains at low points, consisting of
a 1/2" valve with a hose bibb connection, and at
the following locations and equipment:
3
NYCSCA
a.
in
of
in
in
HVAC PIPING 15510 - 43
01/29/16
DESIGN NO. _____
4.
NYCSCA
a.
In each section of piping separated by valves.
b.
For each riser, where riser or runout to riser
has a valve installed.
c.
For each heating cooling unit, having valves
in supply and return connections.
d.
In low point of piping to each down feed
convector or radiator.
Runouts: Connect runouts to upfeed risers to top of
mains, and runouts to downfeed risers to bottom of
mains.
L.
Fill and Make-Up
Plumbing Work.
Water
M.
Dissimilar Pipe Joints
System
to
match
connecting
1.
Between Cast Iron and Threaded Pipe: Use a half
coupling screwed onto the threaded pipe to form a
spigot end and calk into the cast iron pipe.
2.
Between Black Steel Pipe and copper pipe or tubing:
Use a dielectric connector or brass converter
fittings per Sections MC 1203.1 and MC 1303.1.1.
3.
Between galvanized steel pipe and copper pipe or
tubing: Use a dielectric connector or brass
converter fittings per Sections MC 1203.1 and
MC 1303.1.1.
4.
Between Threaded Brass and Threadless Copper Pipe:
Use a suitable brazing adapter.
5.
Between Threaded Pipe and Types L Copper Tubing or
Welded Brass: Water Tube: Use suitable cast bronze
soldering adapter.
6.
Between Cast Iron and Threadless Copper Pipe: Use
an approved flanged adapter.
7.
Between Cast Iron Soil Pipe and Type DWV Copper
Tubing or Welded Brass: Drainage Tube: Use a
suitable copper to soil pipe adapter and caulk into
the cast iron pipe.
HVAC PIPING 15510 - 44
01/29/16
NYCSCA
DESIGN NO. _____
8.
Between Type DWV Copper Tubing or Welded Brass
Drainage Tube and Threaded Outlets at Drains or
Fixtures: Use a suitable cast bronze adapter.
9.
Between Grooved End Steel Pipe and Other Types of
Pipe Joints, Pipe Fittings and Pipe Materials: Use
adapter fittings and grooved end coupling fittings,
as manufactured by the grooved end pipe fitting
manufacturer.
10.
Between Hubless Cast Iron pipe and Other Types of
Pipe Joints, Pipe Fittings and Pipe Materials: Use
adapter fittings, hubless fittings and joint
couplings, as furnished by manufacturer.
11.
Between Cast Iron and Ductile Iron Pipe, with
Rubber Ring Gasketed Joints, and Other Types of
Pipe Joints, Fittings and Materials: Use adapter
fittings of material and type as required for the
particular application.
12.
Dissimilar pipe joints in refrigerant piping, i.e.,
copper to steel, copper to bronze, all stainless
steel; stainless steel to copper, brass or bronze:
Use approved adapter fittings, with a cadmium free
melting alloy.
N.
Piping for Water Heaters: Where Plumbing and Drainage
furnishes a steam tube type water heater, provide steam
and return piping, temperature regulating valve, hand
valves, traps, and all other items and accessories as
shown on the Drawings.
O.
Standard Weight Red Brass Pipe: Use for compressed air
reducing station, piping between boiler and water column,
between boiler and water feeder, between boiler and steam
gauge, between boiler and secondary low water cut-off,
and drip piping from water column, water feeder and
secondary low water cut-off.
P.
Schedule 80 Black Steel Pipe: Use for steam heating
return mains, return riser runouts, steam heating coil
returns, drips, blow-offs, boiler feed pump discharge,
boiler equalizer, steam vent lines, and for all fill and
vent piping buried in the ground. Pipe buried in the
ground shall be protected with heavy coat of black
asphaltum paint.
HVAC PIPING 15510 - 45
01/29/16
3.14
DESIGN NO. _____
PIPE AND FITTING SCHEDULE
A.
Bearing Coolant (Bearing Water Supply (BWS) and Bearing
Water Return (BWR)) 125 psig & Less: Type L hard drawn
copper tubing, with bronze or brass solder fittings.
B.
Boiler Blow Off (BO) and Surface Blow Down (CBD) 250 psig
& Less: Extra Heavy Weight Black Steel pipe with Weld End
Extra Heavy Weight Steel fittings.
C.
Boiler Feed Pump Discharge (BFD), Boiler Equalizer, and
Vent lines: Extra Heavy Weight Black Steel pipe with Weld
End Extra Heavy Weight Steel fittings.
D.
Boiler Feed Pump Suction (BFS) 125 psig & Less:
E.
1.
21/2" and Less: Standard Weight Black Steel pipe,
with
Screwed
End
Standard
Weight
Cast-Iron
fittings, or Weld End Standard Weight Steel
fittings.
2.
3" and Up: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings.
Chemical Feed (CMF) 125 psig & Less:
1.
21/2" and Less: Standard Weight Black Steel pipe,
with
Screwed
End
Standard
Weight
Cast-Iron
fittings, or Weld End Standard Weight Steel
fittings.
2.
3" and Up: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings.
F.
Chemical Feed (CMF) 126 to 250 psig: Extra Heavy Weight
Black Steel pipe with Weld End Extra Heavy Weight Steel
fittings.
L.
Chilled Water Supply and Return (CHWS & CHWR), and Dual
Temperature Water Supply and Return (DTS & DTR), 125 psig
and less:
1.
NYCSCA
3” and Less: Standard weight black steel pipe with
screwed ends standard weight cast-iron fittings; or
Type L hard drawn copper tubing with wrought copper
or cast copper alloy solder fittings and Type 3
solder (ASTM B32 Alloy Grade E, AC or HB) or
mechanically extracted joints made up with brazing
alloy or press fit or grooved end fittings.
HVAC PIPING 15510 - 46
01/29/16
H.
DESIGN NO. _____
2.
4” size: Standard weight black steel pipe with
screwed ends standard weight cast iron fittings or
weld end standard weight steel fittings or grooved
end fittings; or (press fit Type L hard drawn
copper tubing)
3.
5” and Up: Standard weight black steel pipe with
weld end standard weight steel fittings or grooved
end fittings
Chilled Water Supply and Return (CHWS & CHWR) 126 to 250
psig: Standard Weight Black Steel pipe with Weld End
Standard Weight Steel fittings.
Piping connections 1” in size and less may be made with
Standard Weight Black Steel pipe with Screwed End.
I.
J.
Cold Water Above Ground (CW) 125 psig and Less:
1.
4" and Less: Type "L" Copper tubing with soldered
fittings or Grooved End Tubing with Grooved End
fittings from 2” through 4”.
2.
41/2" and Up: Standard Weight Galvanized Steel pipe
with Galvanized fittings or Galvanized Groove End
fittings.
Compressed Air (A) 125 psig and Less:
1.
21/2" and Less: Red Brass pipe with Malleable Brass
threaded fittings.
2.
Standard
Weight
Galvanized
steel
pipe
with
Galvanized fittings is only required for direct
buried pipe. Pipe above ground shall be standard
weight black steel pipe with threaded or grooved
joints.
K.
Compressed Air (A) 126 psig to 250 psig: Standard Weight
Black Steel pipe with Screwed End 300 lb Malleable Iron
fittings or grooved end with grooved end fittings.
L.
Condenser Water: (CWS and CWR) 125 psig and Less:
1.
NYCSCA
21/2" and Less: Standard Weight Black Steel pipe
with
Screwed
End
Standard
Weight
Cast-Iron
fittings, or Weld End Standard Weight Steel
fittings.
HVAC PIPING 15510 - 47
01/29/16
DESIGN NO. _____
2.
M.
N.
NYCSCA
3" and Up: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings or Grooved
End and Grooved End fittings.
Fuel Oil Pump Suction and Fuel Oil Return (FOPS and FOR)
125 psig and less:
1.
21/2" and Less: Standard Weight Black Steel pipe,
with Screwed End Standard Weight Malleable Iron
fittings and fuel resistant thread sealant, or Weld
End Standard Weight Steel fittings.
2.
3" and Up: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings.
3.
Acceptable options are brass pipe, copper or
copper-alloy pipe or Type K copper or copper alloy
tubing per MC Table 1302.3 except above the lowest
floor per Section MC 1305.9.5. Joints between brass
pipe or fittings shall be brazed, mechanical,
threaded or welded joints complying with Sections
MC 1303.3 and MC 1303.4. Joints between copper or
copper alloy pipe or fittings shall be brazed,
mechanical, threaded or welded joints complying
with Sections MC 1303.3 and MC 1303.6.
Joints
between copper or copper alloy tubing or fittings
shall be brazed or mechanical joints complying with
Sections MC 1303.3 or flared joints. Flared joints
shall be made by a tool designed for that
operation. (Refer to Section MC 1303.7).
Fuel Oil Pump Discharge (FOPD) 126 to 300 psig:
1.
21/2"and Less: Extra Heavy Weight Black Steel pipe
with Screwed End Malleable Iron fittings and fuel
resistant thread sealant, or Weld End Extra Heavy
Weight Steel fittings. For piping from transfer
pumps to equipment or storage tanks above the
lowest floor: Lines shall be ASTM A53 or ASTM A106,
Grade B, seamless, with welded connections up to
the oil tank or equipment, except that fittings at
the tank or equipment, shut-off valves, and other
fuel oil flow and control devices may be screwed or
flanged.
2.
3" and Up: Extra Heavy Weight Black Steel pipe,
with Weld End Extra Heavy Weight Steel fittings.
For piping from transfer pumps to equipment or
storage tanks above the lowest floor: Lines shall
be ASTM A53 or ASTM A106, Grade B, seamless, with
HVAC PIPING 15510 - 48
01/29/16
DESIGN NO. _____
welded connections up to the oil tank or equipment,
except that fittings at the tank or equipment,
shut-off valves, and other fuel oil flow and
control devices may be screwed or flanged.
O.
Fuel Oil Fill and Fuel Oil Vent (FOF and FOV) 125 psig
and Less:
Not Directly Buried in the Ground:
1.
21/2" and Less: Standard Weight Black Steel pipe,
with Screwed End Standard Weight Malleable Iron
fittings and fuel resistant thread sealant, or Weld
End Standard Weight Steel fittings.
2.
3" and Up: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings.
3.
Acceptable options are brass pipe, copper or
copper-alloy pipe or Type K copper or copper alloy
tubing per MC Table 1302.3. Joints between brass
pipe or fittings shall be brazed, mechanical,
threaded or welded joints complying with Sections
MC 1303.3 and MC 1303.4. Joints between copper or
copper alloy pipe or fittings shall be brazed,
mechanical, threaded or welded joints complying
with Sections MC 1303.3 and MC 1303.6.
Joints
between copper or copper alloy tubing or fittings
shall be brazed or mechanical joints complying with
Section MC 1303.3 or flared joints. Flared joints
shall be made by a tool designed for that
operation. (Refer to Section MC 1303.7).
Directly buried in the Ground:
1.
NYCSCA
Option 1 (All Sizes): Extra Heavy Weight Black
Steel pipe (Schedule 80) with Weld End Extra Heavy
Weight Steel fittings with cathodic protection.
Where sacrificial anodes or impressed current
systems are used, monitors to check on the adequacy
of the system shall be installed and kept in proper
working
condition.
Except
where
cathodic
protection is provided by impressed current,
underground piping systems shall have dielectric
bushings, washers, sleeves or gaskets installed at
the end to electrically isolate the piping system
from the tank. These dielectric connectors must be
chemically compatible when exposed to petroleum,
petroleum additives and corrosive soils.
The
corrosion protection system must be designed by the
HVAC PIPING 15510 - 49
01/29/16
DESIGN NO. _____
Contractor’s qualified engineer or corrosion
specialist and must be designed to provide a
minimum of thirty (30) years of protection against
external corrosion.
Submit the underground oil
piping
protection
system
design
(cathodic
protection by sacrificial anodes or impressed
current) for approval.
2.
NYCSCA
Option 2 (All Sizes): Double Wall Steel pipe; inner
pipe: Extra Heavy Weight Black Steel pipe (Schedule
80) with Weld End Extra Heavy Weight Steel
fittings; outer pipe: Standard Weight Black Steel
pipe (Schedule 40) with Weld End Standard Weight
Steel Fittings, primed with a factory-formulated
galvanized metal primer for exterior application,
then finish coated with black asphaltum.
P.
Fuel Oil Gauge: Type L copper tubing with wrought copper
solder joint fittings and brazing alloy.
Protective
enclosure piping, if required Standard Weight Black
Steel.
Q.
Diesel Fuel:
1.
21/2" and Less: Standard Weight Black Steel pipe,
with Screwed End Standard Weight Malleable Iron
fittings and fuel resistant thread sealant, or Weld
End Standard Weight Steel fittings.
2.
3" and Up: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings.
3.
Acceptable options are brass pipe, copper or
copper-alloy pipe or Type K copper or copper alloy
tubing per MC Table 1302.3. Joints between brass
pipe or fittings shall be brazed, mechanical,
threaded or welded joints complying with Sections
MC 1303.3 and MC 1303.4. Joints between copper or
copper alloy pipe or fittings shall be brazed,
mechanical, threaded or welded joints complying
with Sections MC 1303.3 and MC 1303.6.
Joints
between copper or copper alloy tubing or fittings
shall be brazed or mechanical joints complying with
Section MC 1303.3 or flared joints. Flared joints
shall be made by a tool designed for that
operation. (Refer to Section MC 1303.7).
HVAC PIPING 15510 - 50
01/29/16
DESIGN NO. _____
4.
Vent and Vapor Recovery (Above Ground):
21/2" and Less: Standard Weight Black Steel pipe,
with Screwed End Standard Weight Malleable Iron
fittings and fuel resistant thread sealant, or Weld
End Standard Weight Steel fittings.
3" and Up: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings
Acceptable options are brass pipe, copper or
copper-alloy pipe or Type K copper or copper alloy
tubing per MC Table 1302.3. Joints between brass
pipe or fittings shall be brazed, mechanical,
threaded or welded joints complying with Sections
MC 1303.3 and MC 1303.4. Joints between copper or
copper alloy pipe or fittings shall be brazed,
mechanical, threaded or welded joints complying
with Sections MC 1303.3 and MC 1303.6.
Joints
between copper or copper alloy tubing or fittings
shall be brazed or mechanical joints complying with
Section MC 1303.3 or flared joints. Flared joints
shall be made by a tool designed for that
operation. (Refer to Section MC 1303.7).
5.
Fill and Gage (not directly buried in the ground):
21/2" and Less: Standard Weight Black Steel pipe,
with Screwed End Standard Weight Malleable Iron
fittings and fuel resistant thread sealant, or Weld
End Standard Weight Steel fittings.
3" and Up: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings.
Acceptable options are brass pipe, copper or
copper-alloy pipe or Type K copper or copper alloy
tubing per MC Table 1302.3. Joints between brass
pipe or fittings shall be brazed, mechanical,
threaded or welded joints complying with Sections
MC 1303.3 and MC 1303.4. Joints between copper or
copper alloy pipe or fittings shall be brazed,
mechanical, threaded or welded joints complying
with Sections MC 1303.3 and MC 1303.6.
Joints
between copper or copper alloy tubing or fittings
shall be brazed or mechanical joints complying with
Section MC 1303.3 or flared joints. Flared joints
shall be made by a tool designed for that
operation. (Refer to Section MC 1303.7).
NYCSCA
HVAC PIPING 15510 - 51
01/29/16
DESIGN NO. _____
6.
Fill and Gage, and Vapor Recovery (buried in the
ground from tank to manholes at grade):
Option 1 (All Sizes): Extra Heavy Weight Black
Steel pipe (Schedule 80) with Weld End Extra Heavy
Weight Steel fittings with cathodic protection.
Where sacrificial anodes or impressed current
systems are used, monitors to check on the adequacy
of the system shall be installed and kept in proper
working
condition.
Except
where
cathodic
protection is provided by impressed current,
underground piping systems shall have dielectric
bushings, washers, sleeves or gaskets installed at
the end to electrically isolate the piping system
from the tank. These dielectric connectors must be
chemically compatible when exposed to petroleum,
petroleum additives and corrosive soils.
The
corrosion protection system must be designed by the
Contractor’s qualified engineer or corrosion
specialist and must be designed to provide a
minimum of thirty (30) years of protection against
external corrosion.
Submit the underground oil
piping
protection
system
design
(cathodic
protection by sacrificial anodes or impressed
current) for approval.
Option 2 (All Sizes): Double Wall Steel pipe; inner
pipe: Extra Heavy Weight Black Steel pipe (Schedule
80) with Weld End and Extra Heavy Weight Steel
fittings; outer pipe: Standard Weight Black Steel
pipe (Schedule 40) with Weld End and Standard
Weight Steel Fittings, primed with a factoryformulated galvanized metal primer for exterior
application,
then
finish
coated
with
black
asphaltum.
R.
Fuel Oil and Diesel Oil Supply Piping from a transfer
pump, Return piping, and Vent piping above the lowest
floor:
4" and Less: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings.
Horizontal piping: double wall (pipe within a pipe)
inner: Black Steel Schedule 40; outer: Black Steel
Schedule 10 all welded construction.
S.
NYCSCA
High Temperature Water Supply and Return (HTS and HTR)
250 psig and Less: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings.
HVAC PIPING 15510 - 52
01/29/16
DESIGN NO. _____
T.
Instrument Air (IA) 60 psig and Less: Type L copper
tubing, with copper or brass or bronze solder fittings.
U.
Steam (LPS and MPS) 125 psig and Less:
1.
21/2" and Less: Standard Weight Black Steel pipe,
with
Screwed
End
Standard
Weight
Cast-Iron
fittings, or Weld End Standard Weight Steel
fittings.
2.
3" and Up: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings.
V.
Steam (HPS) 126 to 250 psig: Standard Weight Black Steel
pipe with Weld End Standard Weight Steel fittings.
W.
Steam Condensate Returns, Risers Runouts, Drips:
X.
Y.
1.
21/2" and Less: Standard Weight Black Steel pipe,
with
Screwed
End
Standard
Weight
Cast-Iron
fittings, or Weld End Standard Weight Steel
fittings.
2.
3" and Up: Extra Heavy Weight Black Steel pipe
(Schedule 80) with Weld End Extra Heavy Weight
Steel fittings.
Vents (V):
1.
21/2" and Less: Standard Weight Black Steel pipe,
with
Screwed
End
Standard
Weight
Cast-Iron
fittings, or Weld End Standard Weight Steel
fittings.
2.
3" and Up: Standard Weight Black Steel pipe with
Weld End Standard Weight Steel fittings.
Hot Water Supply and Return (HWS and HWR) 125 psig and
less:
1.
NYCSCA
3” and Less: Standard weight black steel pipe with
screwed ends standard weight cast-iron fittings; or
grooved end pipe with grooved end fittings; or Type
L hard drawn copper tubing with wrought copper or
cast copper alloy solder fittings and Type 3 solder
(ASTM B32 Alloy Grade E, AC or HB) or mechanically
extracted joints made up with brazing alloy or
press fit or roll grooved copper tube with grooved
end fittings.
HVAC PIPING 15510 - 53
01/29/16
Z.
DESIGN NO. _____
2.
4” size: Standard weight black steel pipe with
screwed ends standard weight cast iron fittings or
weld end standard weight steel fittings or grooved
end fittings; or (press fit Type L hard drawn
copper tubing)
3.
5” and Up: Standard weight black steel pipe with
weld end standard weight steel fittings or grooved
end fittings
4.
Acceptable option is to provide brass pipe, brass
tubing, copper or copper-alloy pipe per MC Table
1202.4. Joints between brass pipe or fittings shall
be brazed, mechanical, threaded or welded joints
conforming to Sections MC 1203.3 and MC 1203.5.
Joints between brass tubing or fittings shall be
brazed, mechanical, or soldered joints conforming to
Sections MC 1203.3 and MC 1203.6. Joints between
copper or copper alloy pipe or fittings shall be
brazed, mechanical, soldered, threaded or welded
joints conforming to Sections MC 1203.3 and
MC 1203.7.
Refrigerants (RS, RL, RG and RD) 350 psig and Less: In
accordance with Section MC 1107.4
AA. Secondary Water (SWS and SWR) 125 psig and Less:
NYCSCA
1.
3” and Less: Standard weight black steel pipe with
screwed ends standard weight cast-iron fittings; or
grooved end pipe with grooved end fittings; or Type
L hard drawn copper tubing with wrought copper or
cast copper alloy solder fittings and Type 3 solder
(ASTM B32 Alloy Grade E, AC or HB) or mechanically
extracted joints made up with brazing alloy or
press fit or roll grooved copper tube with grooved
end fittings.
2.
4” size: Standard weight black steel pipe with
screwed ends standard weight cast iron fittings or
weld end standard weight steel fittings or grooved
end fittings; or (press fit Type L hard drawn
copper tubing)
3.
5” and Up: Standard weight black steel pipe with
weld end standard weight steel fittings or grooved
end fittings
4.
Acceptable option is to provide brass pipe, brass
tubing, copper or copper-alloy pipe per MC Table
HVAC PIPING 15510 - 54
01/29/16
DESIGN NO. _____
1202.4. Joints between brass pipe or fittings shall
be brazed, mechanical, threaded or welded joints
conforming to Sections MC 1203.3 and MC 1203.5.
Joints between brass tubing or fittings shall be
brazed, mechanical, or soldered joints conforming to
Sections MC 1203.3 and MC 1203.6. Joints between
copper or copper alloy pipe or fittings shall be
brazed, mechanical, soldered, threaded or welded
joints conforming to Sections MC 1203.3 and MC
1203.7.
BB. Condensate Drain Piping: Connected to drip-lip pump
bases; all drip piping from air handling units; all
drains and overflow lines from heating and air
conditioning systems, and all condensate piping systems
connected to drain pans - All Sizes: Standard weight
(Schedule 40) galvanized steel pipe; or Type L hard
temper copper tubing and fittings. Minimum condensate
drain line diameter shall be in accordance with MC Table
2
307.2.2.
CC. Emergency/Standby Generator Exhaust: Standard Weight
Black Steel Pipe with Welded Fittings or Double Wall
Insulated Metal Chimney per Section 15575.
END OF SECTION
RM:JB:MM:BB
01/29/16
Notes to Specifier (Delete from Specifications)
1.
Section 15503 is to be utilized if the project involves
construction of a New Building or Addition to building in
Seismic Design Category C or D. Section is also to be utilized
if project involves retrofit work in Existing Buildings
constructed after LL17/1995 went into effect in Seismic Design
Category C or D. Use Section 15504, Vibration Isolation,
(without seismic restraints) for retrofit work on Existing
Buildings constructed prior to the effective date of LL17/1995
or New Buildings or Additions in Seismic Design Category B.
2.
Ensure Contract Drawings are detailed such that they can meet
these requirements.
3.
Edit title as required; use in replacement projects only not
in new schools.
4.
All High Temperature pumps require bearing coolant.
NYCSCA
HVAC PIPING 15510 - 55
01/29/16
DESIGN NO. _____
5.
Designer shall show cleanouts, traps, routing and terminations
(to floor drain, to roof, etc.) of condensate drainage lines
on the Drawings.
6.
Ensure that concrete anchor used as basis of design has ICC
certification for cracked concrete in accordance with Appendix
D of ACI 318.
7.
Where the refrigerant quantity exceeds MC Table 1103.1 for the
smallest space, penetrations for piping that connects separate
pieces of equipment shall be either:
a.
Enclosed by an approved gas-tight, fire- resistive
duct or shaft with openings to those floors served
by the refrigeration system or
b.
Located on the exterior of the building where
vented to the outdoors or to the space served by
the system and not used as an air shaft, closed
court or similar space.
Designer must show appropriate details on the Drawings.
8.
Designer is to show on the Drawing Details the required
strainers for all devices (upstream of control valves for
chilled beams, unit ventilators, fan coil units, cabinet unit
heaters, etc.; pumps; reducing/regulating valves; steam traps
serving steam main drips; etc.). Terminal strainers are to be
provided even if the central combination air and dirt
coalescing separators are provided according to Section 15515,
Hydronic Specialties.
* * *
NYCSCA
HVAC PIPING 15510 - 56
01/29/16
DESIGN NO. _____
LIST OF SUBMITTALS
SUBMITTAL
DATE SUBMITTED
DATE APPROVED
Product Data:
______________
____________
______________
____________
______________
____________
1.
2.
3.
4.
Pipe & Fittings
Piping Specialties
Expansion Compensation
Hangers & Supports
Shop Drawings: Schedule:
1.
2.
3.
4.
5.
Pipe & Fittings
Piping Specialties
Expansion Compensation
Hangers & Supports
Underground Piping Protection
System Design
6. Shop Drawings of Condensate
Lines
Certifications:
1. Welders Qualification Data
2. Brazer Qualifications Data
3. Expansion bolts: ICC Certification
* * *
NYCSCA
HVAC PIPING 15510 - 57