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Primary Piping System Installation RE fAl � !k� S If the pipe is buried,exca- ' vats a working area large For damaged pipe and for leaking joints,Smith Fibercast enough to allow for taper- recommends only the repair methods listed below. DO NOT ing tool rotation. Taper the attempt to repair damaged fittings. Always pressure test re- cut ends of the pipeline ' 'f pair work before putting the line back into service to assure and install the sleeve the soundness of the repaired section. Contact your local coupling. Smith Fibercast representative for further information. During repair,the pipeline cannot be under pressure,and 2. When damage is extensive(too large for replacement by the area to be repaired must be clean and dry throughout the a sleeve coupling),cut out the damaged section,taper the procedure. cut ends,and install two sleeve couplings and a pipe nip- ple.This procedure requires sufficient slack in the line to A. Pipe Patching make the final joint by lifting the pipe(or moving the pipe Follow these instructions to repair pipe wall damage to one side)to engage the where the damaged area is two inches(50 mm)or less in di- bell and spigot joint. ameter. Therefore, it may be nec- 1. Cut a length of good pipe long enough to adequately cover essary to remove addition- the damaged area and extend at least three inches(75 al backfill from a buried mm)(and preferably four inches/100 mm)to either side of line to allow for pipeline the damaged area. movement of several feet. a. Cut out the damaged section of pipe. ■• ' ®v b. Taper one end of a piece of pipe at least as long as the damaged section. When tapering,carefully ob- Patch Damage serve the position of the nipple on the tapering tool. This taper will be used as a gauge. Cut this nipple to the proper length in the following steps. 2. Slit this'patch"length- c. When pipe is buried,excavate a working area large wise twice and remove a enough to allow for tapering tool rotation. Taper the section so that about cut ends of the pipeline and install the two sleeve cou- three-fourths of the cir- plings. Cure these joints and then measure the gap cumference remains. between the sleeve couplings. Now,determine the 3. Thoroughly sand the in- proper length of the pipe nipple. This length is the ner surface of the patch sum of the distance between the two sleeve couplings, and sand a correspond- Iw the insertion length of the tapered ends,and an addl- ing area on the pipe tonal"wet"make-up length to assure joint lock-up. around the damaged section. Use coarse To determine the insertion length of the tapered ends, sandpaper,a file,or a disc sander to remove all gloss move one of the couplings to the side and use the end of from the surfaces to be bonded. the repair nipple made in the previous step to determine the 4. If solvent is used to clean all bonding surfaces,allow the dry fit into each bell. (NOTE: The dry fit must be very tight, solvent to evaporate,then apply a thick coating of adhe- i.e.use a 2x4 to drive the joint together tightly enough that it sive to both surfaces,snap the patch in place,and apply is difficult to separate.) The total length of the repair nipple pressure with hose clamps or banding material until the is determined by adding these two measurements to the adhesive hardens. The distance between the sleeve couplings and then adding the clamps may be left on or two make-up dimensions from Table 9. removed after heat cur- ing, depending on their TABLE 9,Make-up Dimensions(Wet) salvage value. Pipe Size Make-up Dimensions B. Repairing Extensive Damage (in.) (mm) (in.) (mm) When the damaged area in the pipe wall is larger than two 2 50 1/$ 3 inches(50 mm)in diameter,follow these instructions: 3 75 3/16 5 1. When damage is local(less than two inches/50 mm long, 4 100 3/16 5 but more than two inches/50 mm around the circumfer- ence of the pipe),check to see if there is enough slack in the pipe to cut out the damaged section. If there is This added length is needed due to additional insertion enough slack,cut out the damaged section,retaper the that occurs because the adhesive acts as a lubricant. cut ends,and bond a sleeve coupling between the ta- (CAUTION: This additional insertion will be greater if a pered ends. Make sure that the joints are locked up and tight,dry fit is not achieved when measuring. It will also fully cured before pressure testing the repair. be different for each size of pipe.) 15 Installation Instructions