accordance with ASTM D 1785 or ASTM D 2241. PVC pipe and fittings 100 mm 4
inch in diameter and larger shall be in accordance with ASTM D 2241. Pipe
and joints shall be rated for a working pressure of [_____] kPa psi.
Solvent cement joints shall conform to the requirements of ASTM D 2564.
Flanged joint diameter and drilling shall conform to ASME B16.5, Class 150.
2.1.2.3
Polytetrafluoroethylene (PTFE) Pipe and Tubing
Pipe and fittings shall conform to ASTM D 1710, Type I, Grade 1, Class A,
with PTFE compression type fittings. Pipe, tubing and associated fittings
shall be rated for a minimum working pressure of [_____] kPa psi.
2.1.2.4
Polyvinylidene Fluoride (PVDF) Pipe and Tubing
PVDF pipe, tubing and fittings shall be manufactured from materials
conforming to ASTM D 3222 for type II homopolymers. Pipe tolerances for
outside diameter and wall thickness shall be in accordance with ASTM D 1785
for schedule 80 pipe. Tubing and associated fittings shall be rated for a
minimum working pressure of [_____] kPa psi.
2.1.2.5
Copper Pipe
Pipe 100 mm 4 inch and smaller shall be standard weight, seamless, cold
drawn type conforming to ASTM B 88M ASTM B 88 Type K, temper H. Fittings
shall be cast or wrought copper alloy, solder joint type, conforming with
ASME B16.18 or ASME B16.22, as appropriate. Solder used shall be lead free
and comply with ASTM B 32, grade Sb5, 95-5 tin-antimony or Sn96, 96-4
tin-silver solder.
2.1.3
Pipe Hangers and Supports
Pipe hangers and supports shall conform to MSS SP-58 and MSS SP-69.
2.1.4
Stainless Steel Gas Tubing and Fittings
Stainless steel tubing shall conform to ASTM A 778. Wall thicknesses shall
be a minimum of 1.5 mm 0.062 inches for tubing 250 mm 10 inches and
smaller, tubing 300 mm 12 inches in diameter shall have a minimum wall
thickness of 1.9 mm 0.078 inches, tubing 350 through 450 mm 14 through 18
inches in diameter shall have a minimum wall thickness of 2.7 mm. 0.109
inches. Fittings shall conform to ASTM A 774/A 774M, and be of the same
material, grade, schedule or wall thickness as specified for tubing.
Joints shall be full penetration butt welded joints or Van Stone type
joints using angle face rings with bracing flanges drilled in accordance
with ASME B16.5.
2.1.5
Valves
2.1.5.1
Liquid Oxygen (LOX)
LOX valves shall be bronze or Type 316 stainless steel intended for
cryogenic extended service. Materials shall be compatible with the piping
installed.
2.1.5.2
Gate
Gate valves shall comply with the requirements of Section 15400A PLUMBING,
GENERAL PURPOSE.
SECTION 11377
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