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0 <br /> Min pump nozzle size, inches <br /> Suction 3 <br /> Discharge 2 <br /> Min hydrostatic test pressure, psi 1 .5 x shutoff head <br /> plus max suction <br /> pressure <br /> Pump performance shall be stable and free from cavitation and noise <br /> throughout the specified operating head range at design suction <br /> submergences. The design performance shall be based on a wearing ring <br /> diametral or axial clearance of not less than one mil per inch of <br /> wearing ring diameter, or 12 mils total , whichever is greater. <br /> 11A-5. MATERIALS. <br /> Casing, Casing Cover, Ductile iron, ANSI A-395 <br /> and Frame <br /> Impeller Cast iron, ASTM A48. <br /> Shaft Alloy steel , SAE 1045. <br /> Shaft Sleeve AISI Type 316 stainless steel . <br /> Mechanical Seal Durametallic "Type RO" or John <br /> Crane "Type 1" <br /> Flexible Coupling Falk "Steelflex" or Woods <br /> "Sure-Flex"; spacer type <br /> Bearings Antifriction. <br /> Base Cast iron or fabricated steel . <br /> 11A-6. PUMP CONSTRUCTION. <br /> 11A-6.01. Casino Assemblv. The casing assembly and drive connection <br /> shall permit the removal of the rotating element without disconnecting <br /> the piping. Casing parts shall have registered fits to maintain <br /> alignment. The nozzle flanges shall be flat face with ANSI 816.1 , Class <br /> 125 diameter and drilling. A pipe tapped opening shall be provided for <br /> draining stuffing box leakage. <br /> Pipe tapped openings shall be provided for draining, priming, and <br /> venting the casing. <br /> (MARLEY FSSF ) <br /> (CONTRACT NO. 13) 11A-3 <br />