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SECTION 1 WATER MAINS DUCTILE IRON PIPES AND FITTINGS 1 . 01 SCOPE This section covers cast ductile iron pipe and cast ductile iron fittings for water mains . 1 .02 GENERAL A. Ductile iron pipe ( D . I . P . ) 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 Indian River County Department of Utility Services ( IRCDUS ) during construction permit review or by IRCDUS field personnel during construction if it is determined that ductile iron pipe is unsuitable for the particular application . B . All ductile iron pipes shall be manufactured in accordance with AWWA Standard Specifications C151 /A21 . 51 -96 , or latest revision and shall be pressure Class 300 or 350 minimum as depicted on Table 1 . 1 on page 1 -2. All ductile iron pipe crossing under roadways and other trafficked areas shall be pressure class 350 minimum . C . Unless specifically indicated otherwise , restrained joint underground piping shall be manufactured restrained bell and spigot and above ground or exposed piping shall be flanged . D . Cutting of ductile iron pipe shall be by sawing only. 1 . 03 PIPE Ductile iron pipe shall be bell and spigot cast in accordance with AWWA Standard Specifications C151 /A21 . 51 -96 , 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 Standard Specifications C150/A21 . 50-96 , or latest revision , using the physical characteristics cited above , with a minimum working pressure of 200 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 . 1 - 1