2.6
ABOVEGROUND PIPING SYSTEMS FOR WATER OR AFFF SOLUTION
2.6.1
Pipe
Pipe shall be standard weight conforming to ASTM A 795/A 795M or ASTM A
53/A 53M. Pipe 150 mm 6 inch diameter and smaller shall be Schedule 40.
Pipe shall be marked as to the brand or name of the manufacturer, kind of
pipe and the ASTM designation in accordance with the "Product Marking"
provisions of the ASTM standard.
2.6.2
Grooved Fittings and Couplings
Grooved fittings, couplings and bolts shall be provided by the same
manufacturer. Fittings and couplings shall be malleable iron complying
with ASTM A 47/A 47M or ductile iron complying with ASTM A 536. Couplings
shall be of the rigid type except that flexible type will be provided
where flexible joints are specifically required by NFPA 13. Coupling
gaskets shall be Grade E (EPDM) approved for dry pipe fire protection
service. Gasket shall be the flush type that fills the entire cavity
between the coupling and the pipe. Nuts and bolts shall be heat-treated
steel conforming to ASTM A 183 and shall be cadmium plated or zinc
electroplated.
2.6.3
Non-Grooved Fittings
Non-grooved fittings shall be threaded or flanged. Threaded fittings shall
be cast iron conforming to ASME B16.4 or malleable iron conforming to ASME
B16.3. Flanged fittings shall be cast iron conforming to ASME B16.1.
Fittings into which sprinklers, drop nipples or riser nipples (sprigs) are
screwed shall be threaded type. Plain-end fittings with mechanical
couplings, fittings which require drilling a hole in the pipe, and fittings
which use steel gripping devices to bite into the pipe, shall not be used.
2.6.4
Flanges and Gaskets
Flanges shall conform to NFPA 13 and ASME B16.1. Flanges shall be the type
that are welded or threaded to the pipe. Flanges which are bolted to
grooved pipe will not be permitted. Gaskets shall be full face type EPDM
or other approved material.
2.6.4.1
Bolts
Bolts shall be ASTM A 449, Type [1] [2]. Bolts shall extend no less than
three full threads beyond the nut with bolts tightened to the required
2.6.4.2
Nuts
Nuts shall be [ASTM A 193/A 193M, Grade 5] [ASTM A 563M ASTM A 563, Grade
[C3] [DH3]].
2.6.4.3
Washers
Washers shall meet the requirements of ASTM F 436M ASTM F 436. Flat
circular washers shall be provided under all bolt heads and nuts.
2.6.5
Pipe Hangers
Hangers shall be listed in UL Fire Prot Dir or FM P7825a and be of the type
SECTION 13955A
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