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SECTION 4 <br /> GRAVITY SANITARY SEWERS <br /> DUCTILE IRON PIPE <br /> 4.01 SCOPE <br /> This section covers ductile iron pipe and fittings for gravity sanitary <br /> sewers. <br /> 4.02 GENERAL <br /> A. Ductile iron pipe shall be allowed for use as gravity sewer pipe <br /> where compatible with the specific conditions of the project. The <br /> use of material other than ductile iron may be required by Indian <br /> River County Department of Utility Services (IRCDUS) during <br /> construction permit review or by IRCDUS field personnel during <br /> construction if it is determined that ductile iron pipe is unsuitable <br /> for the particular application. <br /> B. All ductile iron pipes shall be manufactured in accordance with <br /> AWWA Standard Specifications C150/A21.50-96 and <br /> C151/A21.51-96, or latest revisions, and shall be pressure Class <br /> 300 or 350 minimums, as depicted on Table 4.1 on page 4-2. All <br /> ductile iron pipe crossing under roadways shall be pressure Class <br /> 350 minimum. <br /> C. Unless specifically indicated otherwise, underground piping shall <br /> be bell and spigot, mechanical joint, or restrained joint and <br /> aboveground piping shall be flanged. <br /> D. Cutting of ductile iron pipe shall be by sawing only. <br /> 4.03 PIPE <br /> Ductile iron pipe shall be bell and spigot cast in accordance with the latest <br /> AWWA Standard Specifications C150/A21.50-96 and C151/A21.51-96. <br /> Cast ductile iron shall have a minimum tensile strength of 60,000 psi with <br /> a minimum yield strength of 42,000 psi. Pipe wall thicknesses shall be <br /> computed in accordance with AWWA Standard Specifications <br /> C150/A21.50-96, using the physical characteristics cited above with a <br /> minimum working pressure of 200 psi and a Laying Condition "Type 2." <br /> Unless otherwise indicated or specified herein, the pipe shall have the <br /> minimum wall thickness according to class designation for diameters <br /> shown. All pipes shall be given a minimum factory hydrostatic test of 500 <br /> psi. <br /> 4 - 1 <br /> la3•E• � • <br />