Hydronic Piping Specification - Materials & Methods

1
SECTION 23 21 13
2
HYDRONIC PIPING
3
PART 1 - GENERAL
4
1.1
SUMMARY
A.
5
1.
2.
3.
4.
5.
6
7
8
9
10
B.
11
16
1.2
26
27
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29
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31
32
33
Section 230529 "Hangers and Supports for HVAC Piping and Equipment"
Section 230548 "Vibration and Seismic Controls for HVAC"
Section 230519 "Meters and Gages for HVAC Piping."
ACTION SUBMITTALS
A.
Product Data: For each type of the following:
1.
2.
3.
4.
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18
19
20
21
22
23
24
25
Steel pipe and fittings.
Joining materials.
Transition fittings.
Dielectric fittings.
Bypass chemical feeder.
Reference Sections:
1.
2.
3.
12
13
14
15
Section includes pipe and fitting materials and joining methods for the following:
B.
Pipe.
Fittings.
Joining materials.
Bypass chemical feeder.
Compliance Review: In addition to all the submittal requirements of this section preorder
bidders will provide a Compliance Review of the Specifications and Addenda. The
Compliance Review shall be a paragraph-by-paragraph review of the Specifications with the
following information, <C=, <D= or <E= marked in the margin of the original Specifications
and any subsequent Addenda.
1.
2.
3.
4.
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IFC
<C=: Comply with no exceptions.
<D=: Comply with deviations. For each and every deviation, provide a numbered
footnote with reasons for the proposed deviation and how the intent of the
Specification can be satisfied.
<E=: Exception, do not comply. For each and every exception, provide a numbered
footnote with reasons and possible alternatives.
Unless a deviation or exception is specifically noted in the Compliance Review, it is
assumed that the Bidder is in complete compliance with the plans and Specifications.
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Deviations or exceptions taken in cover letters, subsidiary documents, by omission
or by contradiction do not release the Bidder from being in complete compliance,
unless the exception or deviation has been specifically noted in the Compliance
Review.
1
2
3
4
C.
5
1.
6
7
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9
10
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12
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14
2.
3.
4.
1.3
1.4
Field quality-control reports.
QUALITY ASSURANCE
A.
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18
Design calculations and detailed fabrication and assembly of pipe anchors and
alignment guides, hangers and supports for multiple pipes, expansion joints and
loops, and attachments of the same to the building structure.
Locations of pipe anchors and alignment guides and expansion joints and loops.
Locations of and details for penetrations, including sleeves and sleeve seals for
exterior walls, floors, basement, and foundation walls.
Locations of and details for penetration and firestopping for fire- and smoke-rated
wall and floor and ceiling assemblies.
INFORMATIONAL SUBMITTALS
A.
15
16
Delegated-Design Submittal:
ASME Compliance: Comply with ASME B31.9, "Building Services Piping," for materials,
products, and installation.
19
PART 2 - PRODUCTS
20
2.1
PERFORMANCE REQUIREMENTS
A.
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22
1.
2.
3.
4.
5.
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24
25
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29
Hydronic piping components and installation shall be capable of withstanding the
following minimum working pressure and temperature unless otherwise indicated:
2.2
Chilled-Water Piping: 150 psig at 45 deg F.
Makeup-Water Piping: 80 psig at 73 deg F.
Condensate-Drain Piping: 80 psig at 150 deg F.
Air-Vent Piping: 80 psig at 180 deg F.
Safety-Valve-Inlet and -Outlet Piping: Equal to the pressure of the piping system to
which it is attached.
COPPER TUBE AND FITTINGS
30
A.
Drawn-Temper Copper Tubing: ASTM B 88, Type L.
31
B.
Annealed-Temper Copper Tubing: ASTM B 88, Type K.
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1
C.
DWV Copper Tubing: ASTM B 306, Type DWV.
2
D.
Grooved, Mechanical-Joint, Wrought-Copper Fittings: ASME B16.22.
1.
3
4
a.
b.
c.
5
6
7
2.
8
9
10
11
12
13
3.
E.
14
15
Manufacturers: Subject to compliance with requirements, provide products by one of
the following:
2.3
Anvil International.
Star Pipe Products.
Victaulic Company.
Grooved-End Copper Fittings: ASTM B 75, copper tube or ASTM B 584, bronze
casting.
Grooved-End-Tube Couplings: Rigid pattern unless otherwise indicated; gasketed
fitting. Ductile-iron housing with keys matching pipe and fitting
grooves, prelubricated EPDM gasket rated for minimum 230 deg F for use with
housing, and steel bolts and nuts.
Wrought-Copper Unions: ASME B16.22.
STEEL PIPE AND FITTINGS
16
17
A.
Steel Pipe: ASTM A 53/A 53M, black steel with plain ends; welded and seamless, Grade B,
and wall thickness as indicated in "Piping Applications" Article.
18
19
B.
Cast-Iron Threaded Fittings: ASME B16.4; Classes 125 and 250 as indicated in "Piping
Applications" Article.
20
21
C.
Malleable-Iron Threaded Fittings: ASME B16.3, Classes 150 and 300 as indicated in
"Piping Applications" Article.
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23
D.
Malleable-Iron Unions: ASME B16.39; Classes 150, 250, and 300 as indicated in "Piping
Applications" Article.
24
25
E.
Cast-Iron Pipe Flanges and Flanged Fittings: ASME B16.1, Classes 25, 125, and 250; raised
ground face, and bolt holes spot faced as indicated in "Piping Applications" Article.
26
27
F.
Wrought Cast- and Forged-Steel Flanges and Flanged Fittings: ASME B16.5, including
bolts, nuts, and gaskets of the following material group, end connections, and facings:
1.
2.
3.
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33
G.
Material Group: 1.1.
End Connections: Butt welding.
Facings: Raised face.
Grooved Mechanical-Joint Fittings and Couplings:
1.
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IFC
Manufacturers: Subject to compliance with requirements, provide products by one of
the following:
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a.
b.
c.
d.
e.
f.
g.
h.
i.
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2
3
4
5
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7
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9
2.
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3.
H.
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2.
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35
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Manufacturers: Subject to compliance with requirements, provide products by one of
the following:
a.
b.
c.
d.
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22
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24
32
Joint Fittings: ASTM A 536, Grade 65-45-12 ductile iron; ASTM A 47/A 47M,
Grade 32510 malleable iron; ASTM A 53/A 53M, Type F, E, or S, Grade B
fabricated steel; or ASTM A 106/A 106M, Grade B steel fittings with grooves or
shoulders constructed to accept grooved-end couplings; with nuts, bolts, locking pin,
locking toggle, or lugs to secure grooved pipe and fittings.
Couplings: Ductile- or malleable-iron housing and EPDM or nitrile gasket of central
cavity pressure-responsive design; with nuts, bolts, locking pin, locking toggle, or
lugs to secure grooved pipe and fittings.
Plain-End Mechanical-Joint Couplings:
1.
19
20
3.
4.
5.
6.
7.
2.4
Anvil International.
Central Sprinkler Company.
Grinnell Mechanical Products.
National Fittings, Inc.
Nexus Valve, Inc.
S. P. Fittings.
Smith-Cooper International.
Star Pipe Products.
Victaulic Company.
Anvil International.
NormaGroup.
Shurjoint Piping Products USA Inc.
Victaulic Company.
Housing: ASTM A-536 Grade 65-45-12 segmented ductile iron or type 304 stainless
steel.
Housing Coating: None.
Gasket: EPDM.
Sealing Mechanism: Double-lip sealing system or carbon steel case-hardened jaws.
Bolts, hex nuts, washers, or lock bars based on manufacturer's design.
Minimum Pressure Rating: Equal to that of the joined pipes.
JOINING MATERIALS
A.
Pipe-Flange Gasket Materials: Suitable for chemical and thermal conditions of piping
system contents.
1.
ASME B16.21, nonmetallic, flat, asbestos free, 1/8-inch (3.175-millimeter) maximum
thickness unless otherwise indicated.
a.
b.
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38
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IFC
Full-Face Type: For flat-face, Class 125, cast-iron and cast-bronze flanges.
Narrow-Face Type: For raised-face, Class 250, cast-iron and steel flanges.
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1
B.
Flange Bolts and Nuts: ASME B18.2.1, carbon steel, unless otherwise indicated.
2
3
C.
Solder Filler Metals: ASTM B 32, lead-free alloys. Include water-flushable flux according to
ASTM B 813.
4
5
D.
Brazing Filler Metals: AWS A5.8/A5.8M, BCuP Series, copper-phosphorus alloys for
joining copper with copper; or BAg-1, silver alloy for joining copper with bronze or steel.
6
7
E.
Welding Filler Metals: Comply with AWS D10.12M/D10.12 for welding materials
appropriate for wall thickness and chemical analysis of steel pipe being welded.
8
F.
Solvent Cements for CPVC Piping: ASTM F 493.
9
10
G.
Solvent Cements for PVC Piping: ASTM D 2564. Include primer according to
ASTM F 656.
11
2.5
DIELECTRIC FITTINGS
12
13
14
A.
General Requirements: Assembly of copper alloy and ferrous materials with separating
nonconductive insulating material. Include end connections compatible with pipes to be
joined.
15
B.
Dielectric Unions:
1.
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17
a.
b.
c.
d.
e.
f.
g.
h.
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2.
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2.6
A.Y. McDonald Mfg. Co.
Capitol Manufacturing Company.
Central Plastics Company.
HART Industrial Unions, LLC.
Jomar Valve.
Matco-Norca.
WATTS.
Zurn Industries, LLC.
Description:
a.
b.
c.
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Manufacturers: Subject to compliance with requirements, provide products by one of
the following:
Standard: ASSE 1079.
Pressure Rating: 250 psig minimum at 180 deg F.
End Connections: Solder-joint copper alloy and threaded ferrous.
BYPASS CHEMICAL FEEDER
A.
Description: Welded steel construction; 125-psig working pressure; 5-gal. capacity; with fill
funnel and inlet, outlet, and drain valves.
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IFC
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B.
1
Manufacturers:
1.
2.
2
3
C.
4
5
Neptune Chemical Pump Company.
Other manufacturer approved by owner and engineer of record.
Chemicals: Specially formulated, based on analysis of makeup water, to prevent
accumulation of scale and corrosion in piping and connected equipment.
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PART 3 - EXECUTION
7
3.1
PIPING APPLICATIONS
A.
8
Chilled-water piping, aboveground, NPS 2 and smaller, shall be any of the following:
1.
9
10
B.
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Chilled-water piping, aboveground, NPS 2-1/2 and larger, shall be any of the following:
1.
12
13
14
2.
C.
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Schedule 40 steel pipe NPS 2-1/2 up to NPS 10; wrought-steel fittings and wroughtcast or forged-steel flanges and flange fittings, and welded and flanged joints.
Standard pipe for NPS 12 and larger.
Makeup-water piping installed aboveground shall be the following:
1.
16
Standard weight steel pipe; Class 125, cast-iron fittings; cast-iron flanges and flange
fittings; and threaded joints.
Type L, drawn-temper copper tubing, wrought-copper fittings, and soldered joints.
17
18
D.
Condensate-Drain Piping: Type L, drawn-temper copper tubing, wrought-copper fittings,
and soldered joints.
19
E.
Air-Vent Piping:
1.
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F.
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3.2
Inlet and Outlet: Same as service where installed with metal-to-plastic transition
fittings for plastic piping systems according to piping manufacturer's written
instructions.
Safety-Valve-Inlet and -Outlet Piping for Hot-Water Piping: Same materials and joining
methods as for piping specified for the service in which safety valve is installed with metalto-plastic transition fittings for plastic piping systems according to piping manufacturer's
written instructions.
PIPING INSTALLATIONS
A.
Drawing plans, schematics, and diagrams indicate general location and arrangement of
piping systems. Install piping as indicated unless deviations to layout are approved on
Coordination Drawings.
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1
2
B.
Install piping in concealed locations unless otherwise indicated and except in equipment
rooms and service areas.
3
4
C.
No piping shall be installed at any time over data hall space. A space shall be considered
data hall when 1 or more IT customer racks occupy the area (or will in the future).
5
6
7
D.
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.
8
E.
Install piping above accessible ceilings to allow sufficient space for ceiling panel removal.
9
F.
Install piping to permit valve servicing.
10
G.
Install piping at indicated slopes.
11
H.
Install piping free of sags and bends.
12
I.
Install fittings for changes in direction and branch connections.
13
J.
Install piping to allow application of insulation.
14
15
K.
Select system components with pressure rating equal to or greater than system operating
pressure.
16
17
L.
Install groups of pipes parallel to each other, spaced to permit applying insulation and
servicing of valves.
18
19
20
M.
Install air vents, consisting of a tee fitting, NPS 1/2 ball valve, and short NPS 1/2 threaded
nipple with cap, at high points in piping system mains and elsewhere as required for system
venting of air.
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22
23
N.
Install drains, consisting of a tee fitting, NPS 3/4 ball valve, and short NPS 3/4 threaded
nipple with cap, at low points in piping system mains and elsewhere as required for system
drainage.
24
O.
Install piping at a uniform grade of 0.2 percent upward in direction of flow.
25
P.
Reduce pipe sizes using eccentric reducer fitting installed with level side up.
26
27
28
Q.
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 up-feed risers, connect the
branch to the top of the main pipe.
29
R.
Install valves according to the industry standard.
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S.
Install unions in piping, NPS 2 and smaller, adjacent to valves, at final connections of
equipment, and elsewhere as indicated.
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IFC
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1
2
T.
Install flanges in piping, NPS 2-1/2 and larger, at final connections of equipment and
elsewhere as indicated.
3
U.
Install shutoff valve immediately upstream of each dielectric fitting.
4
5
V.
Comply with the industry standard for installation of expansion loops, expansion joints,
anchors, and pipe alignment guides.
6
3.3
DIELECTRIC FITTING INSTALLATION
7
A.
Install dielectric fittings in piping at connections of dissimilar metal piping and tubing.
8
B.
Dielectric Fittings for NPS 2 and Smaller: Use dielectric nipples or unions.
9
C.
Dielectric Fittings for NPS 2-1/2 to NPS 4: Use dielectric flanges or flange kits.
10
D.
Dielectric Fittings for NPS 5 and Larger: Use dielectric flange kits.
11
3.4
HANGERS AND SUPPORTS
12
13
A.
Design seismic-restraint hangers and supports for piping and equipment to meet Category
D seismic bracing requirements as indicated in the IBC.
14
15
16
B.
Comply with requirements in Section 230529 "Hangers and Supports for HVAC Piping
and Equipment" for hanger, support, and anchor devices. Comply with the following
requirements for maximum spacing of supports.
17
18
C.
Comply with requirements in Section 230548 "Vibration and Seismic Controls for HVAC"
for seismic restraints.
19
D.
Install the following pipe attachments:
1.
2.
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3.
4.
5.
E.
Adjustable steel clevis hangers for individual horizontal piping less than 20 feet long.
Adjustable roller hangers and spring hangers for individual horizontal piping 20 feet
(6.096 meters) or longer.
Pipe Roller: MSS SP-58, Type 44 for multiple horizontal piping 20 feet (6.096
meters) or longer, supported on a trapeze.
Spring hangers to support vertical runs.
Provide copper-clad hangers and supports for hangers and supports in direct contact
with copper pipe.
Install hangers for steel piping with the following maximum spacing and minimum rod
sizes:
1.
2.
3.
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IFC
NPS 3/4: Maximum span, 7 feet (2.13 meters).
NPS 1: Maximum span, 7 feet (2.13 meters).
NPS 1-1/2: Maximum span, 9 feet (2.74 meters).
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4.
5.
6.
1
2
3
F.
4
5
2.
3.
4.
5.
6.
7.
G.
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Install hangers for drawn-temper copper piping with the following maximum spacing and
minimum rod sizes:
1.
6
7
8
9
10
11
12
13
14
15
16
17
18
19
3.5
NPS 2: Maximum span, 10 feet (3.05 meters).
NPS 2-1/2: Maximum span, 11 feet (3.35 meters).
NPS 3 and Larger: Maximum span, 12 feet (3.66 meters).
NPS 3/4: Maximum span, 5 feet (1.52 meters); minimum rod size, 1/4 inch (6.35
millimeters).
NPS 1: Maximum span, 6 feet (1.83 meters); minimum rod size, 1/4 inch (6.35
millimeters).
NPS 1-1/4 Maximum span, 7 feet (2.13 meters).; minimum rod size, 3/8 inch (9.525
millimeters).
NPS 1-1/2: Maximum span, 8 feet (2.44 meters); minimum rod size, 3/8 inch (9.525
millimeters).
NPS 2: Maximum span, 8 feet(2.44 meters); minimum rod size, 3/8 inch (9.525
millimeters).
NPS 2-1/2: Maximum span, 9 feet (2.74 meters); minimum rod size, 3/8 inch (9.525
millimeters).
NPS 3 and Larger: Maximum span, 10 feet (3.05 meters); minimum rod size, 3/8
inch (9.525 millimeters).
Support vertical runs at roof, at each floor, and at 10-foot (3.05-meter) intervals between
floors.
PIPE JOINT CONSTRUCTION
23
A.
Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe.
24
25
B.
Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before
assembly.
26
27
28
C.
Soldered Joints: Apply ASTM B 813, water-flushable flux, unless otherwise indicated, to
tube end. Construct joints according to ASTM B 828 or CDA's "Copper Tube
Handbook," using lead-free solder alloy complying with ASTM B 32.
29
30
D.
Brazed Joints: Construct joints according to AWS's "Brazing Handbook," "Pipe and Tube"
Chapter, using copper-phosphorus brazing filler metal complying with AWS A5.8/A5.8M.
31
32
33
E.
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:
34
35
36
37
1.
2.
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IFC
Apply appropriate tape or thread compound to external pipe threads unless dry seal
threading is specified.
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.
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1
2
F.
Flanged Joints: Select appropriate gasket material, size, type, and thickness for service
application. Install gasket concentrically positioned. Use suitable lubricants on bolt threads.
3
4
5
G.
Grooved Joints: Assemble joints with coupling and gasket, lubricant, and bolts. Cut or roll
grooves in ends of pipe based on pipe and coupling manufacturer's written instructions for
pipe wall thickness. Use grooved-end fittings and rigid, grooved-end-pipe couplings.
6
7
H.
Plain-End Mechanical-Coupled Joints: Prepare, assemble, and test joints in accordance
with manufacturer's written installation instructions.
8
9
I.
Mechanically Formed, Copper-Tube-Outlet Joints: Use manufacturer-recommended tool
and procedure, and brazed joints.
10
3.6
TERMINAL EQUIPMENT CONNECTIONS
11
12
A.
Sizes for supply and return piping connections shall be the same as or larger than
equipment connections.
13
B.
Install control valves in accessible locations close to connected equipment.
14
15
C.
Install bypass piping with globe valve around control valve. If parallel control valves are
installed, only one bypass is required.
16
17
D.
Install ports for pressure gages and thermometers at coil inlet and outlet connections.
Comply with requirements in Section 230519 "Meters and Gages for HVAC Piping."
18
3.7
CHEMICAL TREATMENT
19
20
21
A.
Fill system with fresh water and add liquid alkaline compound with emulsifying agents and
detergents to remove grease and petroleum products from piping. Circulate solution for a
minimum of 24 hours, drain, clean strainer screens, and refill with fresh water.
22
23
B.
Add initial chemical treatment and maintain water quality in ranges noted above for the
first year of operation.
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25
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3.8
FIELD QUALITY CONTROL
A.
Prepare hydronic piping according to ASME B31.9 and as follows:
1.
2.
3.
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IFC
Leave joints, including welds, uninsulated and exposed for examination during test.
Provide temporary restraints for expansion joints that cannot sustain reactions due
to test pressure. If temporary restraints are impractical, isolate expansion joints from
testing.
Flush hydronic piping systems with clean water; then remove and clean or replace
strainer screens.
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4.
1
2
3
4
5
6
7
5.
B.
Flushing & Cleaning of Piping System
1.
8
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.
Install safety valve, set at a pressure no more than one-third higher than test
pressure, to protect against damage by expanding liquid or other source of
overpressure during test.
The overall chilled water system shall be flushed in a two-step process.
a.
9
10
11
12
1)
13
14
15
16
17
2)
b.
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19
2.
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3.
4.
5.
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6.
7.
C.
HDPE pipe shall be flushed from the highest point possible in the
system.
HDPE piping shall be continuously flushed until all HDPE shavings are
removed from the system. Water shall be inspected by the owner or
owners rep along with the engineer of record prior to completion.
Step #2 3 All scheduled 40 steel piping shall be connected to the underground
HDPE pipe. The entire system as a whole shall be flushed as required below.
Clean and disinfect potable service entrance piping and water distribution piping as
follows:
Purge new piping and parts of existing water piping that have been altered, extended,
or repaired before using.
Use purging and disinfecting procedure prescribed by authorities having jurisdiction
or, if method is not prescribed, procedure described in either AWWA C651 or
AWWA C652 or as described below:
a.
b.
c.
27
28
29
39
Step #1 3 all underground HDPE piping shall be flushed prior to connecting
to the above ground schedule 40 steel piping. Contractor shall provide
temporary connections between the supply and return piping to create a
continuous loop for proper flushing of all possible dead ends.
Trisodium phosphate, 1lb. for each 50 gallons in the system
Sodium carbonate, 1lb. for each 30 gallons in the system
Sodium hydroxide, 1lb. for each 50 gallons in the system
Fill, vent and circulate system with the solution. Allow the solution to reach design
or operating temperature if possible. Contractor shall take water samples every 4
hours and store for visual inspection by the owner and/or engineer. After system has
been circulated for 24 hours, system shall be drained completely and refilled with
fresh water. If water is not clear, flushing of the system shall continue. The system
shall be thoroughly vented of air.
Upon completion of cleaning and flushing the hydronic piping system, but before
balancing, remove, clean and replace strainer screens.
Prepare and submit reports for purging and disinfecting activities.
Perform the following tests on hydronic piping:
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1.
1
2
3
4
5
6
7
8
9
10
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2.
3.
4.
5.
6.
D.
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.
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.
Isolate expansion tanks and determine that hydronic system is full of water.
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 the "SE" value in Appendix A in ASME B31.9,
"Building Services Piping."
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.
Prepare written report of testing.
Perform the following before operating the system:
1.
2.
3.
4.
5.
6.
7.
Open manual valves fully.
Inspect pumps for proper rotation.
Set makeup pressure-reducing valves for required system pressure.
Inspect air vents at high points of system and determine if all are installed and
operating freely (automatic type), or bleed air completely (manual type).
Set temperature controls so all coils are calling for full flow.
Inspect and set operating temperatures of hydronic equipment, such as boilers,
chillers, cooling towers, to specified values.
Verify lubrication of motors and bearings.
END OF SECTION 23 21 13
27
20 March 2023
IFC
23 21 13 - 12
KIO QRO2