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Ji, i I LUii <br />ENVIRONMENTAL HEALTH <br />Cr7„ A'Q7ME11,'T <br />Repair procedures <br />Dualoy 3000(LCX is very resistant to impact damage. It can <br />be damaged by paving stakes, large concrete pieces or other <br />hazards. In the event of damage, the pipe can be repaired us- <br />ing these procedures. <br />Usually the damaged area is obvious. If the exact location of <br />the damage cannot be determined, it may be necessary to re- <br />place that full length of pipe. Standard leak detection methods <br />(soapy water) can be applied progressively along the length of <br />pipe to locate the damaged or defective section. <br />if the primary pipe is leaking at an unknown location, the cut <br />ends of the jacket at each end of each piece of pipe can be <br />soaped to locate the leak (if containment fittings are not bond- <br />ed in place). If the containment pipe is leaking, the surface <br />can be soaped. <br />Minor damage to primary pipe (Isolated to less than one inch <br />(25 mm) of pipe length) <br />• Cut out the damaged pipe. <br />• Remove the jacket and taper each of the ends of the <br />remaining pipe <br />• Assemble primary coupling following standard installa- <br />tion practices. <br />• Assemble containment coupling following standard <br />installation practices. <br />Major damage (greater than one inch (25 mm) of pipe length) <br />• Remove at least 15 inches (380 mm) of pipe length <br />or the full length of damaged pipe if damaged area is <br />greater. <br />• Remove the jacket and taper each of the ends of the <br />remaining pipe <br />• Dry fit two couplings and intermediate pipe nipple into <br />the gap. <br />• Proceed as above for each end of repair area. Finished <br />repair is as shown on the next page. <br />70 <br />