Laserfiche WebLink
ENVIRONMENTAL WEALTH <br />C,'--RARTMEz:NT <br />• Using a flapper sander or 60 to 80 grit Emery cloth, <br />abrade the pipe where it will contact the repair coupling <br />halves and the entire inner surface of the coupling. <br />• Apply adhesive to the cut edge of the hole and to the <br />sanded areas. <br />• Position the coupling halves so that the hole is centered <br />and 90° away from the flanges. <br />• After bolting the halves together, an adhesive bead should <br />be visible around the edges of the coupling halves. <br />Allow the adhesive to cure before pressurizing the <br />system. <br />Apply Adhesive to Cut <br />Ends of Pipe. <br />Repair Half -Coupling Centered Over Hole <br />Moderate damage (under 3 inches (75 mm) in length) <br />If cracks and delaminated areas are too extensive to be en- <br />compassed by a hole saw, removal of a short section of pipe <br />is necessary. For damage three inches or less in length, a cou- <br />pling can be used to make the repair. <br />• If using a half -coupling, align it precisely to maintain <br />spacing requirements. The use of a full coupling is rec- <br />ommended. <br />The ends of the pipe must be within 3 inches (75 mm)of each <br />other for this repair procedure to maintain the UL listing. Simi- <br />larly, pipe insertion of at least 1 inch (25 mm) in the repair <br />couplings must be maintained. <br />• Center the coupling around the gap in the pipe. <br />• Abrade all bonding surfaces before applying adhesive. <br />• Coat the cut ends of the pipe and bonding surfaces with <br />adhesive, then bolt the coupling halves together. <br />38 <br />