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i <br /> TABLE 6. 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 i <br /> 10 11 . 10 --- 0.26 <br /> 12 13 . 20 --- 028 <br /> 14 15 .30 0 . 30 0.31 <br /> 16 17 .40 0 . 32 0 .34 i <br /> 18 19.50 0 .34 0 .36 <br /> 20 21 .60 0 .36 0. 38 <br /> 24 25.80 0 .40 0.43 i <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 i <br /> 6. 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 Specification C110/A21 . 10-98 ) or C153/A21 . 53-00 ), i <br /> or latest revisions . All aboveground fittings shall be flanged <br /> joint . <br /> i <br /> B . The pressure rating shall be 350 psi . <br /> C . All fittings shall be lined with the same material as specified for the <br /> pipe , as per paragraph 6 . 05 - <br /> 6.05 LINING AND COATING <br /> A . Unless otherwise indicated , all ductile iron pipes shall be <br /> factory lined and coated . <br /> B . Lining : For 4" and larger, the interior of the pipe shall have a <br /> fusion-bonded ceramic epoxy lining . The epoxy material i <br /> shall be applied in 1 coat with a minimum dry film thickness <br /> of 40 . 0 mils , see Approved Manufacturer's Product List. If <br /> and where directed by IRCDUS , a polyethylene encasement shall <br /> be provided over pipes and fittings . <br /> i <br /> 6 - 2 <br /> i <br />