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1, <br /> 12 Repair procedures Repairing non-contained primary piping <br /> Refer to Ameron Bulletin 7501 for detailed instructions concerning the repair of <br /> primary piping in non-contained systems <br /> Repairing contained primary piping <br /> The 2-inch Dualoy repair coupling is sized so that it can be contained with 4-inch <br /> Dualoy 3000/L pipe.Thus,when repairing primary pipe contained within 3-inch <br /> standard containment pipe or 31b-inch containment pipe, replace the containment <br /> pipe with a 4-inch containment nipple.Join the 4-inch replacement nipple to the <br /> existing containment pipe with the appropriate reducing couplings. <br /> r®®®®®®®®®®®®®®®®----n <br /> 1 When using wing-nuts to close the primary repair <br /> 1 coupling,align the wings exactly parallel with the line to 1 <br /> 1 maintain the clearance necessary to permit the 4-inch 1 <br /> 1 containment pipe to slip over the 2-inch repair coupling. 1 <br /> i Make this alignment before the adhesive cures. <br /> L--------------------J <br /> i <br /> i <br /> 4 x 3 inch reducing <br /> couplings <br /> 2-inch repair coming <br /> 0 0 <br /> 0 0 <br /> 0 0 0 0 <br /> 0 0 0 <br /> Fig.12-1.Refer to Bulletin 7501 for ° o o ° <br /> detailed procedures which must be Align wing-nuts parallel to pipe to permit <br /> followed for repaired primary piping to <br /> maintain its UL listing. 4•inch pipe 4-inch pipe to slip over repair coupling <br /> i <br /> L <br /> r___________________ <br /> 1 When repairing lines that have been in service and 1 <br /> i that may contain flammable fumes,do not use 1 <br /> 1 electric drills or other tools which may constitute a 1 <br /> I spark hazard near the pipe.Use only air-driven or 1 <br /> 1 manual tools for cutting and sanding. 1 <br /> L------------------J <br /> 17 <br />