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TABLE 1 . 1 <br /> PRESSURE CLASS <br /> OUTSIDE 300 PSI 350 PSI <br /> SIZE DIAMETER THICKNESS THICKNESS <br /> ( INCHES ) (INCHES ) (INCHES) ( INCHES) <br /> 3 3 . 96 --- 0 . 25 <br /> 4 4 . 80 --- 0 . 25 <br /> 6 6 . 90 --- 0 . 25 <br /> 8 9 . 05 --- 0 . 25 <br /> 10 11 . 10 --- 0 . 26 <br /> 12 13 . 20 --- 0 . 28 <br /> 14 15 . 30 0 . 30 0 . 31 <br /> 16 17 .40 0 . 32 0 . 34 <br /> 18 19 . 50 0 . 34 0 . 36 <br /> 20 21 . 60 0 . 36 0 . 38 <br /> 24 25 . 80 0 . 40 0 . 43 <br /> 30 32. 00 0 .45 0 . 49 <br /> 36 38 . 30 0 . 51 0 . 56 <br /> 42 44 . 50 0 . 52 0 . 63 <br /> 48 50 . 80 0 . 64 0 . 70 <br /> 54 57 . 56 0 . 72 0 . 79 <br /> 60 61 . 61 0 . 76 0 . 83 <br /> 64 65 . 67 0 . 80 0 . 87 <br /> 1 . 04 FITTINGS <br /> A. All underground fittings shall be either push on , restrained , or <br /> mechanical joint. Mechanical joints shall conform to AWWA <br /> Standard Specifications C110/A21 . 10-98 or C153/A21 . 53-00 , or <br /> latest revisions . All aboveground or exposed fittings shall be <br /> flanged joint. <br /> B . The pressure rating shall be 350 psi . <br /> C . Joint restraint, when required ; see Approved Manufacturer's <br /> Product List, <br /> D . All fittings shall be lined with the same material as specified for the <br /> pipe as per paragraph 1 . 05 . <br /> 1 . 05 LINING AND COATING <br /> A. Unless otherwise indicated , all ductile iron pipe shall be factory <br /> lined and coated . <br /> B . Lining : All pipes shall be cement mortar single lined and seal <br /> coated in accordance with AWWA Standard Specifications <br /> C104/A21 .4-95 , or latest revision unless doubled lined is required <br /> by IRCDUS . <br /> 1 - 2 <br />