HomeMy WebLinkAbout23 21 13 - Hydronic PipingBEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP HYDRONIC PIPING
STANDARD SPECIFICATIONS 23 21 13 – PAGE 1 OF 7
NOVEMBER 2, 2012
SECTION 232113 HYDRONIC PIPING
PART 1 GENERAL
1.1 DEFINITIONS
A. MSS: Manufacturer’s Standardization Society of the Valve and Fitting
Industry.
B. DWV: Drain, Waste and Vent
C. PTFE: Polytetrafluoroethylene.
1.2 SUBMITTALS
A. Product Data: Provide for each type of the following:
1. Copper Pipe
2. Steel Pipe
1.3 QUALITY ASSURANCE
A. Installer Qualifications:
1. Installers of Pressure6Sealed Joints: Installers shall be certified by the
pressure6seal joint manufacturer as having been trained and qualified to
join piping with pressure6seal pipe couplings and fittings.
B. Steel Support Welding: Qualify processes and operators according to
AWS D1.1/D1.1M, "Structural Welding Code 6 Steel."
C. Welding: Qualify processes and operators according to ASME Boiler and
Pressure Vessel Code: Section IX.
1. Comply with provisions in ASME B31 Series, "Code for Pressure Piping."
2. Certify that each welder has passed AWS qualification tests for welding
processes involved and that certification is current.
PART 2 PRODUCTS
2.1 COPPER TUBE AND FITTINGS
A. Drawn6Temper Copper Tubing: ASTM B 88, Type L
B. Wrought6Copper Fittings: ASME B16.22.
1. Grooved6End Copper Fittings: ASTM B 75 (ASTM B 75M), copper tube or
ASTM B 584, bronze casting.
2. Grooved6End6Tube Couplings: Rigid pattern, unless otherwise indicated;
gasketed fitting. Ductile6iron housing with keys matching pipe and fitting
grooves, prelubricated EPDM gasket rated for minimum 230 deg F (110
deg C) for use with housing, and steel bolts and nuts.
C. Copper or Bronze Pressure6Seal Fittings:
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CORNELL – NCP HYDRONIC PIPING
STANDARD SPECIFICATIONS 23 21 13 – PAGE 2 OF 7
NOVEMBER 2, 2012
1. Housing: Copper.
2. O6Rings and Pipe Stops: EPDM.
3. Tools: Manufacturer's special tools.
4. Minimum 2006psig (13796kPa) working6pressure rating at 250 deg F (121
deg C).
D. Wrought6Copper Unions: ASME B16.22.
2.2 STEEL PIPE AND FITTINGS
A. Steel Pipe: ASTM A 53/A 53M, black steel with plain ends; type, grade, and
wall thickness as indicated in Part 3 "Piping Applications" Article.
B. Wrought6Steel Fittings: ASTM A 234/A 234M, wall thickness to match
adjoining pipe.
C. Wrought Cast6 and Forged6Steel Flanges and Flanged Fittings:
ASME B16.5, including bolts, nuts, and gaskets of the following material
group, end connections, and facings:
1. Material Group: 1.1.
2. End Connections: Butt welding.
3. Facings: Raised face.
D. Steel Pipe Nipples: ASTM A 733, made of same materials and wall
thicknesses as pipe in which they are installed.
2.3 JOINING MATERIALS
A. Pipe6Flange Gasket Materials: Suitable for chemical and thermal conditions
of piping system contents.
1. ASME B16.21, nonmetallic, flat, asbestos free, 1/86inch (3.26mm)
maximum thickness unless thickness or specific material is indicated.
a. Full6Face Type: For flat6face, Class 125, cast6iron and cast6bronze
flanges.
b. Narrow6Face Type: For raised6face, Class 250, cast6iron and steel
flanges.
B. Flange Bolts and Nuts: ASME B18.2.1, carbon steel, unless otherwise
indicated.
C. Solder Filler Metals: ASTM B 32, lead6free alloys. Include water6flushable
flux according to ASTM B 813.
D. Brazing Filler Metals: AWS A5.8, BCuP Series, copper6phosphorus alloys for
joining copper with copper; or BAg61, silver alloy for joining copper with
bronze or steel.
E. Welding Filler Metals: Comply with AWS D10.12/D10.12M for welding
materials appropriate for wall thickness and chemical analysis of steel pipe
being welded.
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CORNELL – NCP HYDRONIC PIPING
STANDARD SPECIFICATIONS 23 21 13 – PAGE 3 OF 7
NOVEMBER 2, 2012
F. Gasket Material: Thickness, material, and type suitable for fluid to be
handled and working temperatures and pressures.
2.4 DIELECTRIC FITTINGS
A. General Requirements: Assembly of copper alloy and ferrous materials with
separating nonconductive insulating material. Include end connections
compatible with pipes to be joined.
B. Dielectric Unions:
1. Description:
a. Standard: ASSE 1079.
b. Pressure Rating: 150 psig (1035 kPa).
c. End Connections: Solder6joint copper alloy and threaded ferrous.
C. Dielectric Flanges:
1. Description:
a. Standard: ASSE 1079.
b. Factory6fabricated, bolted, companion6flange assembly.
c. Pressure Rating: Minimum at 180 deg F (82 deg C), 150 psig (1035
kPa).
d. End Connections: Solder6joint copper alloy and threaded ferrous;
threaded solder6joint copper alloy and threaded ferrous.
D. Dielectric6Flange Insulating Kits:
1. Description:
a. Nonconducting materials for field assembly of companion flanges.
b. Pressure Rating: 150 psig (1035 kPa).
c. Gasket: Neoprene or phenolic.
d. Bolt Sleeves: Phenolic or polyethylene.
e. Washers: Phenolic with steel backing washers.
E. Dielectric Nipples:
1. Description:
a. Standard: IAPMO PS 66
b. Electroplated steel nipple. complying with ASTM F 1545.
c. Pressure Rating: 300 psig (2070 kPa) at 225 deg F (107 deg C).
d. End Connections: Male threaded or grooved.
e. Lining: Inert and noncorrosive, propylene.
2.5 VALVES
A. Automatic Flow6Control Valves:
1. Basis6of6Design Product:
a. Flow Design Inc.
b. Griswold Controls.
2. Body: Brass or ferrous metal.
3. Piston and Spring Assembly: Stainless steel, tamper proof, self cleaning,
and removable.
4. Combination Assemblies: Include bonze or brass6alloy ball valve.
BEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP HYDRONIC PIPING
STANDARD SPECIFICATIONS 23 21 13 – PAGE 4 OF 7
NOVEMBER 2, 2012
5. Identification Tag: Marked with zone identification, valve number, and flow
rate.
6. Size: Same as pipe in which installed.
7. Performance: Maintain constant flow, plus or minus 5 percent over
system pressure fluctuations.
8. Minimum CWP Rating: 175 psig (1207 kPa).
9. Maximum Operating Temperature: 200 deg F (93 deg C).
PART 3 EXECUTION
3.1 PIPING APPLICATIONS
A. Chilled6water piping, aboveground, NPS 2 (DN 50) and smaller, shall be the
following:
1. Type L, drawn6temper copper tubing, wrought6copper fittings, and
soldered brazed or pressure6seal joints.
B. Chilled6water piping, aboveground, NPS 261/2 (DN 65) and larger, shall be
the following:
1. Schedule 40 steel pipe, wrought6steel fittings and wrought6cast or forged6
steel flanges and flange fittings, and welded and flanged joints.
2. RTRP and RTRF with adhesive or flanged joints.
C. Glycol cooling6water piping, aboveground, NPS 2 (DN 50) and smaller, shall
be the following:
1. Type L, drawn6temper copper tubing, wrought6copper fittings, and
soldered brazed or pressure6seal joints.
D. Glycol cooling6water piping, aboveground, NPS 261/2 (DN 65) and larger,
shall be the following:
1. Schedule 40 steel pipe, wrought6steel fittings and wrought6cast or forged6
steel flanges and flange fittings, and welded and flanged joints.
E. Condensate6Drain Piping: Type M, drawn6temper copper tubing, wrought6
copper fittings, and soldered joints.
3.2 PIPING INSTALLATIONS
A. Drawing plans, schematics, and diagrams indicate general location and
arrangement of piping systems. Indicate piping locations and arrangements if
such were used to size pipe and calculate friction loss, expansion, pump
sizing, and other design considerations. Install piping as indicated unless
deviations to layout are approved on Coordination Drawings.
B. Install piping in concealed locations, unless otherwise indicated and except in
equipment rooms and service areas.
C. Install piping indicated to be exposed and piping in equipment rooms and
service areas at right angles or parallel to building walls. Diagonal runs are
prohibited unless specifically indicated otherwise.
BEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP HYDRONIC PIPING
STANDARD SPECIFICATIONS 23 21 13 – PAGE 5 OF 7
NOVEMBER 2, 2012
D. Install piping above accessible ceilings to allow sufficient space for ceiling
panel removal.
E. Install piping to permit valve servicing.
F. Install piping at indicated slopes.
G. Install piping free of sags and bends.
H. Install fittings for changes in direction and branch connections.
I. Install piping to allow application of insulation.
J. Select system components with pressure rating equal to or greater than
system operating pressure.
K. Install groups of pipes parallel to each other, spaced to permit applying
insulation and servicing of valves.
L. Install drains, consisting of a tee fitting, NPS 3/4 (DN 20) ball valve, and short
NPS 3/4 (DN 20) threaded nipple with cap, at low points in piping system
mains and elsewhere as required for system drainage.
M. Install piping at a uniform grade of 0.2 percent upward in direction of flow.
N. Reduce pipe sizes using eccentric reducer fitting installed with level side up.
O. Install branch connections to mains using mechanically formed tee fittings in
main pipe, with the branch connected to the bottom of the main pipe. For up6
feed risers, connect the branch to the top of the main pipe.
P. Install unions in piping, NPS 2 (DN 50) and smaller, adjacent to valves, at
final connections of equipment, and elsewhere as indicated.
Q. Install flanges in piping, NPS 261/2 (DN 65) and larger, at final connections of
equipment and elsewhere as indicated.
3.3 HANGERS AND SUPPORTS
A. Install the following pipe attachments:
1. Adjustable steel clevis hangers for individual horizontal piping less than 20
feet (6 m) long.
2. Adjustable roller hangers and spring hangers for individual horizontal
piping 20 feet (6 m) or longer.
3. Pipe Roller: MSS SP658, Type 44 for multiple horizontal piping 20 feet
(6 m) or longer, supported on a trapeze.
4. Spring hangers to support vertical runs.
5. Provide copper6clad hangers and supports for hangers and supports in
direct contact with copper pipe.
B. Install hangers for steel piping with the following maximum spacing and
minimum rod sizes:
BEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP HYDRONIC PIPING
STANDARD SPECIFICATIONS 23 21 13 – PAGE 6 OF 7
NOVEMBER 2, 2012
HANGERS MAXIMUM SPAN MINIMUM ROD SIZE
NPS 261/2 11 feet 3/8 inch
NPS 3 12 feet 3/8 inch
C. Install hangers for drawn6temper copper piping with the following maximum
spacing and minimum rod sizes:
HANGERS MAXIMUM SPAN MINIMUM ROD SIZE
NPS ¾ 5 feet ¼ inch
NPS 1 6 feet ¼ inch
NPS 161/2 8 feet 3/8 inch
NPS 2 8 feet 3/8 inch
3.4 PIPE JOINT CONSTRUCTION
A. Join pipe and fittings according to the following requirements and Division 23
Sections specifying piping systems.
B. Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel
pipe.
C. Remove scale, slag, dirt, and debris from inside and outside of pipe and
fittings before assembly.
D. Soldered Joints: Apply ASTM B 813, water6flushable flux, unless otherwise
indicated, to tube end. Construct joints according to ASTM B 828 or CDA's
"Copper Tube Handbook," using lead6free solder alloy complying with
ASTM B 32.
E. Brazed Joints: Construct joints according to AWS's "Brazing Handbook,"
"Pipe and Tube" Chapter, using copper6phosphorus brazing filler metal
complying with AWS A5.8.
F. Threaded Joints: Thread pipe with tapered pipe threads according to
ASME B1.20.1. Cut threads full and clean using sharp dies. Ream threaded
pipe ends to remove burrs and restore full ID. Join pipe fittings and valves as
follows:
1. Apply appropriate tape or thread compound to external pipe threads
unless dry seal threading is specified.
2. Damaged Threads: Do not use pipe or pipe fittings with threads that are
corroded or damaged. Do not use pipe sections that have cracked or
open welds.
BEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP HYDRONIC PIPING
STANDARD SPECIFICATIONS 23 21 13 – PAGE 7 OF 7
NOVEMBER 2, 2012
G. Welded Joints: Construct joints according to AWS D10.12/D10.12M, using
qualified processes and welding operators according to Part 1 "Quality
Assurance" Article.
H. Flanged Joints: Select appropriate gasket material, size, type, and thickness
for service application. Install gasket concentrically positioned. Use suitable
lubricants on bolt threads.
I. Pressure6Sealed Joints: Use manufacturer6recommended tool and
procedure. Leave insertion marks on pipe after assembly.
3.5 FIELD QUALITY CONTROL
A. Prepare hydronic piping according to ASME B31.9 and as follows:
1. Leave joints, including welds, uninsulated and exposed for examination
during test.
2. Flush hydronic piping systems with clean water; then remove and clean or
replace strainer screens.
3. Isolate equipment from piping. If a valve is used to isolate equipment, its
closure shall be capable of sealing against test pressure without damage
to valve. Install blinds in flanged joints to isolate equipment.
4. Install safety valve, set at a pressure no more than one6third higher than
test pressure, to protect against damage by expanding liquid or other
source of overpressure during test.
B. Perform the following tests on hydronic piping:
1. Use ambient temperature water as a testing medium unless there is risk of
damage due to freezing. Another liquid that is safe for workers and
compatible with piping may be used.
2. While filling system, use vents installed at high points of system to release
air. Use drains installed at low points for complete draining of test liquid.
3. Subject piping system to hydrostatic test pressure that is not less than 1.5
times the system's working pressure. Test pressure shall not exceed
maximum pressure for any vessel, pump, valve, or other component in
system under test. Verify that stress due to pressure at bottom of vertical
runs does not exceed 90 percent of specified minimum yield strength or
1.7 times "SE" value in Appendix A in ASME B31.9, "Building Services
Piping."
4. After hydrostatic test pressure has been applied for at least 10 minutes,
examine piping, joints, and connections for leakage. Eliminate leaks by
tightening, repairing, or replacing components, and repeat hydrostatic test
until there are no leaks.
5. Prepare written report of testing.
END OF SECTION 232113