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0?%22%99 18:3o ND.0715 1?19 <br /> 9 <br /> Repair procedures Ameronproduces repair couplings.n2througna-inchsizes.These coupfingsare <br /> listed by Underwriters Laboratories.Inc.'or use in buried fuel systems and can be <br /> Installed without in-frrinch tapering. <br /> Mincr damage(delaminated areas under'1 inch In diameter) <br /> Mincr damage is typically caused by impact and appears in the form of whitish discot- <br /> oration or small 6rc,jmferentiai cracks.Minor repairs can be made usirg <br /> half-couplings or full couplings.See Fig.9-6 for proper cutting procedures. <br /> ----------- ------- <br /> r When r epairirg lines which have already been in service and Nhicn may contain <br /> flammable fumes,do not use electric drills or other Cods which may constitute a 1 <br /> spark hazard near the pipe.Use only air-driven or manual tools for 1 <br /> cutting and sanding. 1 <br /> L----------------------------- <br /> Remove <br /> ---------.. ---------------------Remove the affected area with a I'A-inch We saw. <br /> • Clean all bums from edge of hole. <br /> t WnOgra ane removed <br /> `— witty tole sav <br /> Fig.9-r-.titlnor oamege to pipe can '✓/ I \\ <br /> be repand by removing the <br /> damaged arse with a hole saw. <br /> Sena boding swfsces J <br /> • l.,sirg a flaGC?r sander or emery cloth,abrade the pipe where it wiil contact the <br /> repair�:ouphrig halves and the entire neer surface of the coupling. <br /> e Appty adhesive to the cut edge of the hole and to the sanded areas. <br /> • Positicn the coupling haives so that the hole is centered and 90'away from <br /> the flanges. <br /> • Atter bolting the halves together,an adhesive bead should be visible <br /> around Vie edges of the coup,ing halves, <br /> • Allow the achesive to cure befora pressurizing the system. <br /> Glued WOW <br /> A{1GlY 2G-R51119 m(]Jr 1 / . <br /> ecc-ct hole <br /> l , <br /> ,;%�\,� <br /> NO <br /> 77 <br /> Fig.9 Wirrorarrage it sparred by <br /> remo vtng the affected area mL4 a hose <br /> saw.A repair courorg 4,positioned so <br /> chat Ure hole m careered and 90•away � <br /> from the covprirsg rTanges &onoir-coupling contarea overhde <br /> Moderate damage(under 3 inches in length) <br /> If cracks and delaminated areas are too extensive to be encompassed by a hole sa.v. <br /> removal of a snort section of pipes necessary.For damage three inches ortess in <br /> leNth,a couoiing can be used to make the repair_ <br /> • If using a naJ-coupling,align it precisely to mairdain spacing requirements, <br /> The use or a full coupiirg Is recommended. <br /> --------------------------------� <br /> I The ends of the pipe must be within 3 inches of each ocher for this repair procedure I <br /> to maintain the UL listing.Similar v,pipe insertlon of at leant 2 inches in the repair 1 <br /> ( <br /> couplings must be maintained. I <br /> L•----------------------------------� <br /> 13 <br />