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2 .2 . 8 . Polyethylene (PE) Pressure Pipe <br /> Materials For Pipe Sizes 3 " And Lar er Cont' d) <br /> Dimensions and workmanship shall be as specified by ASTM F714 . PE fittings and transitions <br /> shall meet ASTM D3261 . PE pipe shall have a minimum density of 0. 955 grams per cubic <br /> centimeter. All PE pipe and fittings shall have a Hydrostatic Design Basis (HDB) of 1 ,600 psi. <br /> PE pipe and accessories 3 " and greater in diameter, shall be 160 psi at 73 .4°F meeting the <br /> requirements of Standard Dimension Ration (SDR) 11 as MINIMUM STRENGTH. <br /> 1 Compliance with the above requirements must be certified by the pipe Manufacturer. <br /> Fittings <br /> All molded fittings and fabricated fittings shall be fully pressure rated to match the pipe SDR <br /> pressure rating to which they are made. All fittings shall be molded or fabricated by the <br /> manufacturer. No Contractor fabricated fittings shall be used unless approved by the Engineer. <br /> The manufacturer of the PE pipe shall supply all PE fittings and accessories as well as any <br /> adapters and/or specials required to perform the work as shown on the Drawings and specified <br /> herein. <br /> All transition from PE pipe to ductile iron shall be made per the PE pipe manufacturer' s <br /> recommendations and specifications. A molded mechanical joint (mj ) adapter within a carbon <br /> steel back-up ring assembly shall be used for pipe type transitions. <br /> Fittings and transitions shall be as manufactured by Phillips Driscopipe, Inc. , 1000 Series <br /> Pressure Pipe, Chevron Chemical Company Plexco/Spiralite pipe, or equal . <br /> Compliance with the above requirements must be certified by the pipe supplier. <br /> Jointing Method <br /> The pipe shall be joined with butt, heat fusion joints. All joints shall be made in strict <br /> compliance with the manufacturer' s recommendations <br /> Lengths of pipe shall be assembled into suitable installation lengths by the butt-fusion process . <br /> All pipe so joined shall be made from the same class and type of raw material made by the same <br /> raw material supplier. Pipe shall be furnished in standard laying lengths not to exceed 50 feet. <br /> 24 <br />