2006-377 - Laserfiche WebLink

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H . Pipe shall be laid to lines and grade shown on the Drawings with bedding and backfill as shown on the Drawings . I . When installation of pipe is not in progress, including lunchtime, the open ends of the pipe shall be closed by fabricated plugs, or by other approved means . J . Pipe shall be stored on clean level ground to prevent undue scratching or gouging . The handling of the pipe shall be in such a r, manner that the pipe is not damaged by dragging it over sharp and cutting objects . The maximum allowable depth of cuts, scratches or gouges on the exterior of the pipe is 5 percent of wall thickness . Sections of pipe with cuts, scratches or gouges r exceeding five percent of the pipe wall thickness shall be removed completely and the ends of the pipeline rejoined . The interior pipe surface shall be free of cuts, gouges or scratches . r K. The pipe shall be joined by the method of thermal butt fusion , as outlined in ASTM D2657 . All joints shall be made in strict +■ compliance with the manufacturer's recommendations . L. Mechanical connections of the polyethylene pipe to auxiliary equipment such as valves , pumps and tanks shall be through flanged connections which shall consist of the following : 1 . A polyethylene flange shall be thermally butt-fused to the stub end of the pipe . A stainless steel or ductile iron back- up ring shall be used on both sides of the connection prior to thermally butt-fusing the polyethylene flange. 2 . A 316 stainless steel back-up ring shall mate with a 316 stainless steel flange . 3 . Ductile iron back-up rings shall mate with cast iron flanges. M . Flange connections shall be provided with a full face neoprene gasket. N . All PE pipe must be at the temperature of the surrounding soil at the time of backfilling and compaction . O . No single piece of pipe shall be laid unless it is straight. The centerline of the pipe shall not deviate from a straight line drawn between the centers of the openings at the ends of the pipe by more than 1 / 16-in per foot of length . If a piece of pipe fails to meet this requirement check for straightness , it shall be rejected and removed from the site. Laying instructions of the manufacturer shall be explicitly followed . P. If a defective pipe is discovered after it has been installed , it shall be removed and replaced with a sound pipe in a satisfactory manner. All pipe and fittings shall be thoroughly cleaned before 3 - 7