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r <br /> r C. Coating : Unless specified otherwise , all pipe shall be bituminous <br /> coated outside to a dry film thickness of at least 1 mil . <br /> r D. Repair: Anywhere that the coating is removed purposely or <br /> accidentally, the area shall be cleaned of any rust, grease, and dirt <br /> and re-coated to a minimum dry film as specified for the individual <br /> r piece . <br /> E. Encasement: If and where directed by IRCDUS's Engineer, a <br /> r polyethylene encasement shall be provided around pipe, fittings, <br /> and valves . The material , installation , and workmanship shall <br /> conform to applicable sections of AWWA C105 (ANSI A21 . 5-99) , <br /> or latest revision . Installation methods A or B shall be employed <br /> using flat tube polyethylene. The Contractor shall make <br /> provisions to keep the polyethylene from direct exposure to <br /> sunlight prior to installation . Backfilling following installation shall <br /> be completed without delay to avoid exposure to sunlight . <br /> F. All exposed Ductile Iron pipe shall be coated with Duromar or <br /> approved equal . Ductile Iron water mains are to be painted blue. <br /> 1 .06 BELL AND SPIGOT CONNECTIONS <br /> r <br /> Joints in bell and spigot pipe shall be push-on , mechanical , or restrained <br /> joints in accordance with AWWA Standard C111 (ANSI 21 . 11 -00) , or <br /> latest revision . Pipe restraints shall also be in accordance with iRCDUS <br /> + Standards or as directed by IRCDUS 's Engineer. <br /> 1 .07 FLANGED CONNECTIONS <br /> + <br /> A. All flanged pipe barrels shall comply with the physical and <br /> chemical requirements as set forth in the Handbook of Ductile Iron <br /> + Pipe of the Cast Iron Pipe Research Association , latest revisions. <br /> Flanges shall be in accordance with ANSI Specification B16 . 1 for <br /> Class 125 flanges . Bolts shall comply with ANSI Specification <br /> r 818 .2 . <br /> B. Flanged pipe shall be faced and drilled to the American Standard <br /> Drilling , unless special drilling is called for or required . Where tap <br /> or stud bolts are required , flanges shall be tapped . Flanges shall <br /> be accurately faced and drilled smooth and true, at right angles to <br /> the pipe axis and shall be covered with zinc dust and tallow or a <br /> rust preventive compound immediately after facing and drilling . <br /> C. Flanged pipe with screwed-on flanges shall be furnished with long <br /> hubs , and the flanges shall be screwed on the threaded end of the <br /> pipe in the shop, and the face of the flange and end of pipe <br /> refaced together. There shall be no leakage through the pipe <br /> + threads and the flanges shall be designed to prevent corrosion of <br /> the threads from outside- <br /> 1 - 3 <br /> utside.1 - 3 <br />