COMPLIANCE INFO_2003-2005 - Laserfiche WebLink

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�u fIBERCLASS For damaged pipe and for leaking joints, Smith Fiberglass Products rec- ommends only the repair methods listed below. DO NOT attempt to repair damaged fittings. Always pres- sure test repair work before putting the line back into service to assure the soundness of the repaired section. Contact your local Smith Fiberglass Products' representative for further information. During repair, the pipeline cannot be under pressure, and the area to be repaired must be clean and dry throughout the procedure. 1.8.1 Repairing weather damage When machined surfaces of pipe or fittings are exposed to direct sunlight prior to installation, the result is a loss of joint bonding strength. Therefore, if protective coverings have been re- moved and ultraviolet exposure was greater than one day, the following steps must be taken: 1. For exposed spigot ends, cut 1/2" to 1 " 03 to 25mm) off the end and retaper. This will remove the weathered layer and give a fresh surface for bonding. For fittings with spigot ends, it is sometimes possible to lightly sand the spigot using the same procedure as for bell ends. Om � I �_M! W� MW4- Figure 1.8.1 2. For exposed bell ends (pipe or fittings), sand thoroughly until the entire surface appears fresh. Hand sanding with 40 grit sandpaper is recommended. A flapper sander of about 40 grit mounted on an electric hand drill also works well; however, use a light sanding op- eration to prevent changing the taper angle. Note: The use of solvent does not remove ultraviolet degradation. COUPLINGS OR INTEGRAL BELLS WITH T.A.B. THREADS THAT HAVE BEEN OVEREXPOSED MUST BE RE- PLACED. 1.8.2 Pipe patching Follow these instructions to repair pipe wall damage where the dam- aged area is two inches (50mm) or less in diameter. 1. Cut a length of good pipe long enough to adequately cover the darxiaged area and extend at least three inches (75mm; (and prefer- ablyfour inches/100 mm) to either side of the damaged area (See Figure 1.8.1). 2. Slit this "patch" lengthwise twice and remove a section so that about three-fourths of the circumference remains (See Figure 1.8.2). s-, Figure 1.8.2 23 3. Thoroughly sand the innersurface of the patch and sand a corre- sponding area on the pipe around the damaged section (See Figure 1.8.3). Use coarse sandpaper, a file, or a disc sander to remove all gloss from the surfaces to be bonded. 4. If solvent is used to clean all bonding surfaces, allow the sol- vent to evaporate, then .apply a thick coating of adhesive to both surfaces, snap the patch in place, and apply pressure with hose clamps or banding material until the adhesive hardens (See Figure 1.8.4). The clamps may be left on or removed after heat curing, de- pending on their salvage value. 1.8.3 Repairing extensive damage When the damaged area in the pipe wall is larger than two inches (50 mm) in diameter, follow these in- structions. 1. When damage is local (less than two inches/50 mm long, but more than two inches/50mm around the circumference of the pipe), check to see if there is enough slack in the pipe to cut out the damaged sec- tion. If there is enough slack, cut out the damaged section, retaper Figure 1.8.3