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r <br /> + SECTION 3 <br /> WATER SERVICES <br /> .. POLYETHYLENE (PE) TUBING & PRESSURE PIPES <br /> 3. 01 SCOPE FOR POLYETHYLENE TUBING <br /> This section covers polyethylene pipes and fittings for water services. <br /> + <br /> 3.02 POLYETHYLENE TUBING 3 INCHES IN DIAMETER AND SMALLER <br /> A. Polyethylene tubing shall comply with applicable requirements for <br /> PE 3408 extrusion compound polyethylene plastic material as <br /> stated in AWWA Standard Specifications C901 -96 , or latest <br /> revision , and shall comply with the following , <br /> 1 . Tubing shall have a working pressure of 200 psi at 73. 4° F. <br /> 2 . Tubing surfaces shall be glass smooth , and shall be free <br /> r from bumps and irregularities . Materials must be <br /> completely homogeneous and uniform in appearance. <br /> 3 . Tubing dimensions and tolerances shall correspond with <br /> the values listed in ASTM D-2239, with a standard <br /> dimension ratio (SDR) of 9 . <br /> r 4. Tubing shall be fully labeled with brand name and <br /> manufacturer, NSF seal , size, type of plastic material , and <br /> ASTM designation with which the tubing complies . <br /> r <br /> 3. 03 JOINTS <br /> + A. Joints for polyethylene tubing shall be of the compression type, <br /> utilizing a totally confined grip seal and coupling nut. Stainless <br /> steel tube stiffener inserts shall also be used for PE tubing <br /> services . <br /> B. Other type joints may be considered for specific installations upon <br /> submission of specifications and approval by IRCDUS . <br /> 3.04 INSTALLATION <br /> A. Backfill shall be free of rocks and debris . <br /> B . Bending radius shall be large enough so that tubing is not crimped <br /> r or damaged and so that the flow of water is not restricted . <br /> Manufacturer's minimum radius recommendations are to be <br /> utilized during installation of PE tubing - <br /> 3 - 1 <br />