1.5
QUALITY ASSURANCE
Materials and equipment shall conform to ASME B31.8 to the extent specified
herein, to local utility requirements, and to other requirements specified.
1.6
DELIVERY, STORAGE, AND HANDLING
1.6.1
Delivery and Storage
Inspect materials delivered to the site for damage, and store with a
minimum of handling. Store materials on site in enclosures or under
protective coverings. Store plastic piping under cover out of direct
sunlight. Do not store materials directly on the ground. Keep inside of
pipes and fittings free of dirt and debris.
1.6.2
Handling
Handle pipe, fittings, valves, and other accessories in such manner as to
ensure delivery to the trench in sound, undamaged condition. Take special
care not to damage coatings on pipe and fittings. Repair damaged coatings
to original finish. Handle steel piping with coal-tar enamel coating in
accordance with AWWA C203.
PART 2
PRODUCTS
2.1
PIPING MATERIALS FOR GAS DISTRIBUTION MAINS
Piping shall be [black steel,] [reinforced thermosetting epoxy resin (RTR)]
[or] [polyethylene (PE)]. Provide shutoff valves [and insulating joints]
where indicated.
2.1.1
Steel Pipe and Fittings
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NOTE: Delete all words in brackets when steel pipe
is expected to be subjected to unusually severe
conditions (including handling) such as impact
stresses, seismic forces, burial beneath vehicle or
railroad crossings, significant differential
settlement, or underneath piers.
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API Spec 5L, Grade [A,] B, or X42, [ASTM A 53, Grade A or B, ASTM A 135, or
ASTM A 139, Grade A or B], Schedule 40. Coat pipe and fittings for
underground lines as specified in paragraph entitled "Shop-Applied Coatings
for Buried Steel Pipe and Fittings." Do not coat pipe and fittings for
aboveground lines. Butt weld fittings shall be wrought steel, ASME B16.9,
Schedule 40. Socket weld and threaded fittings shall be forged steel, ASME
B16.11.
2.1.1.1
Joints and Jointing Materials
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NOTE: Welded joints are preferred when using steel
pipe. Flanges and screwed joints are not
recommended for use on buried pipe. Steel flanges
should not be connected to cast-iron flanges on
buried pipelines in any case.
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SECTION 02551N
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