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D. Care shall be taken during transportation of the pipe such that it <br /> will not be cut, kinked or otherwise damaged. <br /> E. Ropes, fabric or rubber protected slings and straps shall be used <br /> when handling pipes. Chains, cables or hooks inserted into the <br /> pipe ends shall not be used. Two slings spread apart shall be <br /> used for lifting each length of pipe. <br /> F. Pipes shall be stored on level ground, preferably turf or sand, free <br /> of sharp objects, which could damage the pipe. Stacking of the <br /> polyethylene pipe shall be limited to a height that will not cause <br /> excessive deformation of the bottom layers of pipes under <br /> anticipated temperature conditions. Where necessary due to <br /> ground conditions, the pipe shall be stored on wooden sleepers, <br /> spaced suitably and of such width as not to allow deformation of <br /> the pipe at the point of contact with the sleeper or between <br /> supports. <br /> G. Care shall be exercised when lowering pipe into the trench to <br /> prevent damage or twisting of the pipe. <br /> H. Pipe shall be laid to lines and grade shown on the Drawings with <br /> bedding and backfill as shown on the Drawings. <br /> I. When installation of pipe is not in progress, including lunchtime, <br /> the open ends of the pipe shall be closed by fabricated plugs, or <br /> by other approved means. <br /> J. Pipe shall be stored on clean level ground to prevent undue <br /> scratching or gouging. The handling of the pipe shall be in such a <br /> manner that the pipe is not damaged by dragging it over sharp <br /> and cutting objects. The maximum allowable depth of cuts, <br /> scratches or gouges on the exterior of the pipe is 5 percent of wall <br /> thickness. Sections of pipe with cuts, scratches or gouges <br /> exceeding five percent of the pipe wall thickness shall be removed <br /> completely and the ends of the pipeline rejoined. The interior pipe <br /> surface shall be free of cuts, gouges or scratches. <br /> K. The pipe shall be joined by the method of thermal butt fusion, as <br /> outlined in ASTM D2657. All joints shall be made in strict <br /> compliance with the manufacturer's recommendations. <br /> L. Mechanical connections of the polyethylene pipe to auxiliary <br /> equipment such as valves, pumps and tanks shall be through <br /> flanged connections which shall consist of the following: <br /> 1. A polyethylene flange shall be thermally butt-fused to the <br /> stub end of the pipe. A stainless steel or ductile iron back- <br /> up ring shall be used on both sides of the connection prior <br /> �%w to thermally butt-fusing the polyethylene flange. <br /> 3 - 7 <br />