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DocuSign Envelope ID:81 E05E8E-EED7-43D3-8B8A-0811 OE72140A <br /> SECTION 33 34 00 - FORCE MAINS <br /> PART 2 - PRODUCTS <br /> 2.1 GENERAL <br /> A. All material and appurtenances shall meet the following minimum standard requirements <br /> therefore. It shall be each manufacturer's responsibility to check the installation and to <br /> furnish material that will be full capable of performing its intended function. <br /> B. Pipe shall be of the type, size, class and diameter as hereinafter specified and called for <br /> by the Plans and/or Bid. <br /> C. Trench width for buried pipe design shall be considered as the outside diameter of the <br /> pipe plus 2', at the bottom and up to 1' above the top of the pipe. <br /> D. Buried pipe shall be designed for laying condition shown on construction drawing to <br /> withstand all internal pressures and external loads with a minimum depth to cover of T, <br /> for pipelines 8" and smaller in diameter, and T-6"for lines 10" and larger in diameter, and <br /> greater depths of cover where required by the Plans, plus an H-20 live load in <br /> accordance with A.A.S.H.T.O. Specifications. <br /> E. Design pressure shall consist of 100 psi working pressure plus 100 psi surge allowance <br /> for force mains designated for Class 160 pipe and 150 psi working pressure plus 100 psi <br /> surge allowance for force mains designated for 150 psi working pressure. <br /> F. Pipe diameters shown or called for shall be the minimum net inside diameter of the pipe <br /> after any required lining is placed, with a maximum tolerance of/4' on the minus side, for <br /> sizes through 36" diameter. <br /> G. Pipe fittings shall be of the size, configuration and type called for by the plans. All fittings <br /> shall be of at least the same class as the pipe with which they are used. Ductile or gray <br /> cast iron fittings shall be used with all ductile iron, gray cast iron, and PVC pipe (4" or <br /> larger in diameter). <br /> H. Valves shall be of the type, size, and class required by the plans and all valves shall have <br /> standard mechanical joint ends, except where flanged or other type ends are specifically <br /> required. Valves, where required, shall be furnished with operating nuts, or handwheels <br /> as necessary, except in instances where other operating devices are specified or shown. <br /> All valves shall be of at least the same class of pipe with which they are used. A valve <br /> box shall be provided for each underground valve, except where shown differently on the <br /> plans. Concrete pipe vaults; or brick or precast manholes with crete pipe vaults; or brick <br /> or precast manholes with cast iron covers shall be provided for all air valves. <br /> 2.2 DUCTILE CAST IRON PIPE <br /> A. Ductile cast iron pipe shall be centrifugally cast of ductile cast iron having a minimum <br /> tensile strength of 60,000 psi, a minimum yield strength of 42,000 psi, and a minimum <br /> elongation of 10% (Grade 60-42-10). It shall be designed, manufacture, and shall <br /> conform to the requirements of ANSI A21.51 (AWWA C151) Standards, for a minimum <br /> 150 psi operating pressure plus a minimum allowance of 100 psi for surge. <br /> B. Nominal laying lengths shall be 18' or 20' nominal maximum of 20% of each size for each <br /> order being as much as 24" shorter than the nominal laying length and an additional 10% <br /> as much as 6" shorter than nominal laying length. <br /> Orange County DAA PN R00592-225N2 <br /> Walnut Grove Wastewater System January, 2021 <br /> 33 34 00-3 <br />