Laserfiche WebLink
10 Containment system Pneumatic testing <br /> testing Plan tests carefully and carry them out with all due precaution. <br /> Pressurizing equipment should be suited to the size of the system and the pressure <br /> required and should be operated by qualified and experienced personnel only.Pressure <br /> sources should be capable of approaching test pressure gradually. <br /> Use gauges with a full-scale reading of no more than twice the test pressure:Do not use <br /> a 100 psi gauge for a 10 psi test. Use reliable gauges calibrated against a dead weight <br /> tester and zeroed for atmospheric pressure. <br /> Pneumatic testing at approximately 10 psi is recommended and is the preferred method <br /> of testing containment piping.Higher pressures are dangerous as a sudden release <br /> could cause the piping to whip out of the trench.A 10-psi test will attest to the integrity of <br /> the system.If higher test pressures are mandated,please consult Ameron Fiberglass <br /> Pipe Systems. <br /> Repair procedures Repairing non-contained primary piping <br /> Refer to Ameron Bulletin 7501 for detailed instructions concerning the repair of <br /> primary piping in non-contained systems <br /> Repairing contained primary piping <br /> The 2-inch Dualoy repair coupling is sized so that it can be contained with 4-inch <br /> Dualoy 3000/L pipe.Thus,when repairing primary pipe contained within 3-inch <br /> standard containment pipe,replace the containment pipe with a 4-inch containment <br /> nipple.Join the 4-inch replacement nipple to the existing containment pipe with 4x3 <br /> reducing couplings. <br /> 4 x 3 inch reducing <br /> couplings <br /> 2-inch repair coupling <br /> 0 0 <br /> 0 0 <br /> Fig.i l-1.Refer to Bulletin 7501 for <br /> detailed procedures which must be — — — — <br /> followed for repaired primary piping to <br /> maintain its UL listing. <br /> 0 0 <br /> 0 0 <br /> 4-inch pipe <br /> r___________________ <br /> When repairing lines that have been in service and i <br /> i that may contain flammable fumes,do not use 1 <br /> 1 electric drills or other tools which may constitute a 1 <br /> 1 spark hazard near the pipe.Use only air-driven or <br /> manual tools for cutting and sanding. <br /> L®®®®®®®®®®®®®®®®®®.J <br /> 11 <br />