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4W F . Ductile Iron Pipe and Fittings 1 . General a. Ductile iron pipe shall be allowed for use as water pipe where compatible with the specific conditions of the project. The use of material other than ductile iron may be required by IRCDUS during construction permit review, or by IRCDUS field personnel, if it is determined that ductile iron pipe is unsuitable for the particular application . r' b. All ductile iron pipe shall be manufactured in accordance with AWWA Specification C- 151 and shall be Class 52 minimum. c. Unless specifically indicated otherwise, restrained joint underground piping shall be manufactured restrained bell and spigot and aboveground piping shall be flanged. d . Cutting of ductile iron pipe shall be sawing only. 2. Pipe Ductile iron pipe shall be bell and spigot cast in accordance with AWWA Specification C151 (ANSI A21 . 51 -86) , or latest revision . Cast ductile iron shall have a minimum tensile strength of 60 , 000 psi , with a minimum yield strength of 42, 000 psi . Pipe wall thickness shall be computed in accordance with AWWA Specification C150 (ANSI A21 .50-81 ), or latest revision, using the physical characteristics cited above, with a minimum working pressure of 150 psi and a Laying Condition "Type 2. " Unless • otherwise indicated or specified herein, the pipe "shall have the minimum wall thickness according to class designation for diameters shown. All pipe shall be given a minimum factory hydrostatic test of 500 pounds per square inch. r Class 50 Class 52 Pipe Diameter Minimum Wall Thickness Minimum Wali Thickness .. Inches inches inches 4 — 0 .29 6 0.25 0. 31 8 0.27 0.33 10 0.29 0.35 12 0.31 0 .37 14 0 .33 0. 39 16 0.34 0.40 18 0.35 0.41 20 0.36 0.42 24 0.38 0.44 30 0.39 0.47 36 0.43 0.53 42 0.47 0. 59 w