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SECTION 8 SMITH REPAIR PROCEDURES For damaged pipe and for leaking the entire surface appears fresh. (See Figure 1.8.3). Use coarse joints, Smith Fiberglass Products Hand sanding with 40 grit sandpaper, a file, or a disc recommends only the repair sandpaper is recommended. A sander to remove all gloss from methods listed below. DO NOT flapper sander of about 40 grit the surfaces to be bonded. attempt to repair damaged fittings. mounted on an electric hand 4. Clean all bonding surfaces with Always pressure test repair work drill also works well; however, joint cleaner from an adhesive before putting the line back into use a light sanding operation to kit.Allow the cleaner to evapo- service to assure the soundness of prevent changing the taper angle. rate, then apply a thick coating the repaired section. Contact your Note:The cleaner provided in the of adhesive to both surfaces, local Smith Fiberglass Products rep- adhesive kit does not remove snap the patch in place, and resentative for further information. ultraviolet degradation. apply pressure with hose During repair, the pipeline cannot clamps or banding material be under pressure,and the area to COUPLINGS OR INTEGRAL BELLS until the adhesive hardens (See be repaired must be clean and dry WITH T.A.B. THREADS THAT Figure 1.8.4). The clamps may throughout the procedure. HAVE BEEN OVEREXPOSED be left on or removed after heat MUST BE REPLACED. curing, depending on their 1.8.1 Repairing weather damage salvage value. 1.8.2 Pipe patching g When machined surfaces of pipe Follow these instructions to repair 1.8.3 Repairing extensive damage or fittings are exposed to direct pipe wall damage where the dam- When the damaged area in the sunlight prior to installation, the aged area is two inches(51 mm)or pipe wall is larger than two inches result is a loss of joint bonding less in diameter. (51 mm) in diameter,follow these strength. Therefore, if protective coverings have been removed and 1. Cut a length of good pipe long instructions. ultraviolet exposure was greater enough to adequately cover the 1. When damage is local (less than one day, the following steps damaged area and extend at than two inches/51 mm, long, must be taken: least three inches(76 mm) (and but more than two inches/51 1. For exposed spigot ends,cut 112" preferably four inches/102 mm) mm around the circumference to 1" 03 to 25 mm) off the end to either side of the damaged of the pipe), check to see if and retaper. This will remove area (See Figure 1.8.1). there is enough slack in the the weathered layer and give a 2. Slit this"patch"lengthwise twice pipe to cut out the damaged fresh surface for bonding. For and remove a section so that about section. If there is enough slack, fittings with spigot ends, it is three-fourths of the circumfer- cut out the damaged section, sometimes possible to lightly ence remains (See Figure 1.8.2). retaper the cut ends, and bond sand the spigot using the same a sleeve coupling between the procedure as for bell ends. 3. Thoroughly sand the inner tapered ends. Make sure that surface of the patch and sand a the joints are locked up and 2. For exposed bell ends (pipe or corresponding area on the pipe fully cured before pressure test- fittings), sand thoroughly until around the damaged section ing the repair. Patch —�®� Damage Figure 1.8.1 Figure 1.8.2 Figure 1.8.3 21