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material designation of PE 3408, with an ASTM D3350 cell classification of 34544C . The <br /> pipe shall be black in color, containing approximately 2 percent U .V . stabilizer. The pipe <br /> shall be co-extruded with a color coded sheath or have three (3) sets of colored lines at the <br /> 120° quadrants. The pipe shall be designed for a working pressure of 160 psi. Pipe shall be <br /> extruded to the minimum wall thickness described in AWWA C906 for DRI 1 . Pipe outside <br /> dimensions shall meet that of ductile iron pipe size (D .I.P. S .). Pipe shall be provided in <br /> nominal 40 foot long sections. <br /> During the extrusion process, the HDPE pipe shall be continuously marked with durable <br /> printing including the following information: <br /> 1 ) Nominal Size <br /> 2) Dimension Ratio <br /> 3) Manufacturer Name and Product Series <br /> 4) Cell Class <br /> 5) ASTM Basis <br /> 6) Pipe Test Category <br /> 7) Plant Identification <br /> 8) Production Date <br /> B . Fittings <br /> HDPE fittings shall be in accordance with ASTM D 3261 and shall be manufactured by <br /> injection molding, a combination of extrusion and machining, or fabricated from HDPE pipe <br /> conforming to this specification. The fittings shall be designed for a working pressure of <br /> 160 psi . The fittings shall be manufactured from the same resin type and cell classification <br /> as the pipe itself. The fittings shall be homogeneous throughout and free from cracks, holes <br /> foreign inclusions, voids, or other injurious defects. All fittings shall be constructed to have <br /> a minimum D.R. 11 sidewall thickness, with a D.I.P . S. outside diameter. <br /> C . Joints <br /> Sections of polyethylene pipe shall be joined at the job site by the butt fusion process into <br /> one continuous length. The joining process shall be the heat fusion method and shall be <br /> performed in strict accordance with the pipe manufacturer' s recommendations. The heat <br /> fusion equipment used in the joining procedures should be capable of meeting all conditions <br /> recommended by the pipe manufacturer. <br /> 3. EXECUTION OF WORK <br /> Installation of the polyethylene pipeline shall be conducted using "medi" — HDD or "maxi" — HDD <br /> equipment of intermediate size and capabilities. ' The installation guidelines and practices governing <br /> this installation shall follow that of the "maxi" — HDD category rather than "mini" — HDD practices. <br /> A. Preparation <br /> 1 ) Clearing — The CONTRACTOR shall perform all clearing necessary, where <br /> applicable for the proper installation of the pipe at the locations shown on the <br /> drawings. Plantings, shrubbery, trees, utility poles or structures subject to damage <br /> 02400 - 4 <br /> 02400 — Directional Bore Crossings <br /> = <br />