2008-009 (4) - Laserfiche WebLink

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r b. Flanged pipe shall be faced and drilled to the American Standard drilling, unless special drilling is called for or required. Where tap or stud bolts are required, flanges shall be tapped. Flanges shall be accurately faced and drilled smooth and true, at right angles to the pipe axis and shall be covered with zinc dust and tallow or a rust preventive compound immediately after facing and drilling. c. Flanged pipe will be screwed on flanges shall be furnished with long hubs, and the flanges shall be screwed on the threaded end of the pipe in the shop, and the face of the flange and end of pipe refaced together. There shall be no leakage through the pipe threads and the flanges shall be designed to prevent corrosion of the threads • from outside. d. Flanged joints shall be made with bolts or stud bolts and nuts. Bolts, stud bolts and r nuts shall conform to American Standard heavy dimensions, semi -finished with square or hexagonal heads and cold punched hexagonal nuts, meeting the requirements of ASTM Designation A-307. Bolt sizes shall be American Standard for the flanges specified, and bolts and nuts shall have good, true threads. e. Gaskets shall be in accordance with AWWA Standard C-115 (ANSI A21.15-88), or latest revision. 7. Submittals Before starting fabrication of the cast iron pipe and fittings, complete detailed work drawings shall be submitted by the Contractor for approval by the Engineer. Such drawings shall show the piping layouts and contain schedules of all pipe, fittings, valves, expansion joints, hangers and supports and other appurtenances. Where special fittings are required, they shall be shown in large detail with all necessary dimensions. The drawings submitted shall show flanged jointed sections placed so as to be removable s without disturbance to the main pipe sections. 8. Marking Two inch wide detection tape shall be spiral wrapped or affixed to the top of the pipe. Tape shall have the words 'Water Main' in 1/4" high letters appearing one or more times every 24 inches. 9. Installation of Water Mains a. Unless otherwise noted on the drawings or in other sections of this specification, the pipe shall be handled and installed in strict accordance with the manufacturer's instructions and with the applicable provisions of AWWA C600. If a conflict exists �+ between the manufacturer's instructions and the AWWA Standards, the manufacturer's instructions shall govem. The Contractor shall use every precaution during construction to protect the pipe against the entry of nonpotable water, dirt, r. wood, small animals, and any other foreign material that would hinder the operation of the pipe line. Where the groundwater elevation is above the bottom of the trench, the Contractor shall provide suitable equipment at no additional cost to the Owner. All piping shall be placed in a dry trench, unless wet trench installation is approved by the Engineer. r No