Laserfiche WebLink
02/22.'99 18:03 N0.036 1?02 <br /> 9 <br /> Repair procedures Ameron producesrepair couplings in 2 through 4-inch sizes.These couplings are <br /> listed by Underwriters L.aboratQdas,Inc.for use in buried fuel systems and can be <br /> i installed without in-trench tapering. <br /> Minor damage(delaminated areas under t Inch In diameter) <br /> Minor damage is typically caused by impact and appears in the fdrm of whitish discol- <br /> bratlon or small circumferential cracks.Minor repairs can be made using <br /> half-couplings or full Couplings.See fig.9-6 for proper cutting procedures. <br /> }----------�ra�rw rr wrrr—r------*w—�w ow ww w� <br /> 11 When repairing lines which have already been In service and which may contain 1 <br /> 1 flammable fumes,do not use electric drills or other tools which may constitute a 1 <br /> ( spark hazard near the pipe.Use only air-driven or manual tools for <br /> I cutting and sanding. <br /> ------------------ <br /> • Remove the affected area with a 1'A-inch hole saw. <br /> • Clean ail burrs from edge of hale. <br /> Damaged area rernoved <br /> With molls saw <br /> 3 <br /> Fig.&1.Mfrtordarnage to pipe can <br /> be repaired by removing the <br /> . 11 <br /> damaged area with a hok saw. <br /> Send bonding aurtwm <br /> • Using a Flapper sander or emery cloth,abrade the pipe where h will contact the <br /> repair coupling halves and the entire inner surface of the coupling- <br /> App ly <br /> oupling_Apply adhesive to the cut edge of the hole and to the sanded areas. <br /> • Position the coupling halves so that the hole is centered and 90°away from <br /> the flanges. <br /> • After bolting the halves together,an adhesive bead should be visible <br /> around the edges of the coupling halves. <br /> • Allow the adhesive to cure before pressurizing the system. <br /> Apply eeredive hD cut Glued arm <br /> E6�e ci hais 'III <br /> Fig.9-2.Minordame„ge isrspaired by <br /> removing tha affected area with a hole <br /> saw.R repair couprng is posX*nett s <br /> that the hole ig centered and 900 away <br /> from the�ouplirng Ranges. Repair half caeplingge aver Hole <br /> I <br /> Moderate damage(under 3 inches in length) <br /> if cracks and delaminated areas are too extensive to be encompassed by a hote saw, <br /> removal of a shoe section of pfpe is necessary.For damage three inches or less in <br /> length,a coupling can be used to make the repair. <br /> ■ if usinga halt-coupling,align€t preciseiyto maintain spacing requirements. <br /> The use of afull coupling is recommended. <br /> r----------r-- ------- <br /> 1 The ends of the pipe must be within 9 inches of each other for this repair procedure <br /> 1 to mainWn the UL listing.Similarly,pipe insertion of at least 2 inches in the repair 1 <br /> couplings must be maintained. 1 <br /> L----------------------------- <br /> 3 A <br />