COMPLIANCE INFO_2006-2012 - Laserfiche WebLink

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Primary Piping System Installation REPAIR PROCEDURES For damaged pipe and for leaking joints, FGS Smith Fibercast recommends only the repair methods listed below. DO NOT attempt to repair damaged fittings. Always pressure Repairing Extensive Damage test repair work before putting the line back into service to When the damaged area in the pipe wall is larger than assure the soundness of the repaired section. Contact your two inches(50 mm) in diameter,follow these instructions: local FGS representative for further information. • For 2" pipe, cut the protective mesh covering and slide During repair,the pipeline cannot be under pressure,and away from damaged area, the area to be repaired must be clean and dry throughout the • When damage is local(less than two inches/50 mm long procedure. but more than two inches/50 mm around the circumference of the pipe), check to see if there is Pipe Patching enough slack in the pipe to cut out the damaged section. Follow these instructions to repair pipe wall damage If so,cut out the damaged section, retaper the cut ends, where the damaged area is two inches (50 mm) or less in and bond a sleeve coupling between the tapered ends. diameter: Make sure the joints are locked up and fully cured before pressure testing the repair. • For 2" pipe, cut the protective mesh covering and slide away from damaged area. If the pipe is buried, excavate a working area large • Cut a length of good pipe long enough to adequately enough to allow for tapering tool rotation. Taper the cut ends cover the damaged area and extend at least three inches of the pipeline and install the sleeve coupling. (75 mm) (and preferably four inches/100 mm) to either • When damage is extensive(too large for replacement by a sleeve coupling), cut out the damaged section, taper the cut ends,and install two sleeve couplings and a pipe nipple. This procedure requires sufficient slack in the Patch —► Damage line to make the final joint by lifting the pipe (or moving the pipe to one side)to engage the bell and spigot joint. Therefore, it may be necessary to remove additional side of the damaged area. backfill from a buried line to allow the pipeline movement • Slit the "patch" lengthwise of several feet. twice and remove a section – Cut out the damaged section of pipe, so that about three-fourths of – Taper one end of a piece of pipe at least as long the circumference remains. as the damaged section. When tapering,carefully • Thoroughly sand the inner observe the position of the nipple on the tapering surface of the patch and sand tool. This taper will be used as a gauge. Cut this a corresponding area on the nipple to the proper length in the following steps. pipe around the damaged – When pipe is buried, excavate a working area section. Use coarse sand- large enough to allow for tapering tool rotation. paper, a file, or a disc sander Taper the cut ends of the pipeline and install the to remove all gloss from two sleeve couplings. Cure these joints and then the surface to be bonded. _ measure the gap between the sleeve couplings. • If solvent is used to clean Determine the proper length of the pipe nipple. all bonding surfaces, allow the This length is the sum of the distance between solvent to evaporate then the two sleeve couplings, the insertion length of apply a thick coating of the tapered ends, and an adidtional "wet' make- adhesive to both surfaces, snap the patch in place, up length to assure joint lock up. and apply pressure with hose clamps or banding material until the adhesive hardens. The clamps may be left on To determine the insertion length of the tapered ends, or removed after heat curing. move one of the couplings to the side and use the end of • Replace the protective mesh covering if the repair is the repair nipple made in the previous step to determine the made on 2"pipe. dry fit into each bell. (NOTE: The dry fit must be very tight, i.e. use a 2x4 to drive the joint together tightly enough that it is difficult to separate.) The total length of the repair nipple is determined by adding these two measurements to the 14