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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 <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 /> 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), or <br /> latest revisions. All aboveground fittings shall be flanged joint. <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 factory <br /> 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 shall be <br /> applied in 1 coat with a minimum dry film thickness of 40.0 mils, in <br /> accordance with IRCDUS Approved Manufacturer's Product List.. <br /> If and where directed by IRCDUS, a polyethylene encasement <br /> shall be provided over pipes and fittings. <br /> 6 - 2 <br /> 1 23. G�.3• <br />