2.2.4
Flexible Pipe Fittings
Provide bronze mechanical couplings supplied by pipe manufacturer.
2.2.5
Joint Compound
Joint compound for piping system shall be resistant to water and be
suitable for use with fuel containing 40 percent aromatics.
2.2.6
Flange Gaskets
Provide non-asbestos compressed material in accordance with ASME B16.21,
1.60 mm 1/16 inch thickness, full face or self-centering flat ring type.
Gaskets shall contain aramid fibers bonded with styrene butadiene rubber
(SBR) or nitrile butadiene rubber (NBR). NBR binder shall be used for
hydrocarbon service.
2.2.7
Flexible Connectors
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NOTE: Listed flexible connectors may be used when
allowed by NFPA 30 and when approved by local codes
as an alternative for swing joints.
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Flexible metal hose, corrugated type with braided wire sheath covering,
close-pitch annular corrugations, rated for working pressure of at least
862 kPa (gage) 125 psig, 305 mm 12 inch minimum live length, threaded end
connections and shall conform to requirements of UL 567. Metal for hose
and braided wire sheath shall be ANSI 300 series stainless steel.
2.3
DOUBLE-WALL SECONDARY CONTAINMENT PIPING
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NOTE: Underground piping which carries petroleum
shall be double-wall constructed. Vent lines may be
of single-wall construction. A leak monitoring
system shall also be included to monitor the annular
space between the pipe walls.
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Provide double-wall containment piping system. Exterior containment pipe
shall be compatible with transported fluid and sized to contain 110 percent
of the total volume of the primary inner pipe or pipes and additional
equipment required, such as leak detection cables. Containment pipe
containing multiple product carrying pipes shall have adequate spacing and
supports for the product carrying piping to ensure unhindered performance
of the leak detection system. Steel secondary containment piping shall be
factory coated. Coating shall consist of thermoplastic resin conforming to
FS L-C-530.
2.4
VALVES
Valves shall be Class 150. Gate valves shall be wedge disc type, union
bonnet, inside screw, rising stem, and shall have threaded ends with an
"O"-ring seal. Check valves shall be synthetic disc, swing check type with
screwed ends. Valve body shall be bronze. Gate and check valves shall
conform to MSS SP-80. Provide UL listed emergency shut-off valve in
SECTION 15193N
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