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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 r <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 /> Specification C110 (ANSI 21 . 10-98 ) or C153 (ANSI 21 . 53-00 ) , or <br /> latest revisions . All aboveground fittings shall be flanged joint . <br /> B . The pressure rating shall be 350 psi . <br /> C. Joint restraint, when required . Shall be by Nappco C- 1300 <br /> restrainer or approved equal . <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 pipe shall be cement mortar lined and seal coated in <br /> accordance with AWWA Standard C104 (ANSI A21 . 4-95 ), or <br /> latest revision unless double lined is required by IRCDUS . <br /> 1 - 2 <br />