2.1.3
Fiberglass and Flexible Pipe
2.1.3.1
Pipe
Fiberglass and flexible pipe shall be approved by the Underwriters
Laboratories for the service intended and listed in UL Gas&Oil Dir. Use of
fiberglass or flexible piping is limited to buried service only and at
pressures not exceeding that marked on the pipe.
2.1.3.2
Fiberglass Pipe Fittings
Fiberglass pipe fitting shall be the same manufacturer as the pipe with
adhesives compatible with the product. Threading of fiberglass pipe or
mechanical pipe coupling will not be permitted.
2.1.3.3
Flexible Pipe Fittings
Bronze mechanical coupling shall be supplied by the same manufacturer as
the pipe.
2.1.4
Vent Piping
ASTM A 53/A 53M standard weight, zinc-coated steel with zinc-coated
malleable iron fittings ASME B16.3.
2.1.5
Valves
2.1.5.1
Bronze Gate Valves
MSS SP-80 Class 125, 50 mm 2 inches and smaller, wedge disk, nonrising stem.
2.1.5.2
Steel Gate Valves
API 600, oil service, Class 150.
2.1.5.3
MSS SP-72 for flanged or butt-welding ends and MSS SP-110 for threaded,
socket-welding, solder joint, grooved and flared ends.
2.1.5.4
UL 842, steel or bronze bodies, corrosion-resistant valve seats, and
positive closing to prevent leakage.
2.1.5.5
Check Valves
MIL-V-18436, Group [A] [C], Type [I] [II] [III] [_____], Trim [3] [4] [5]
[_____], Class 150 [_____].
2.1.5.6
Plug Valves
[Bronze] [Cast-Steel] [API Std 599], PTFE seat, non-lubricated full port,
[taper plug] [square head], UL listed.
2.1.6
Secondary Containment System for Piping
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SECTION 15192N
Page 13
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