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3.6.3.AIR TEST OF END TANK(S) 3.7.1.4.If the tank is not configured as shown in FIGURE 3-4 <br /> 3.6.3.1.Connect the pressure source to the test manifold(s)on prior to preinstallation testing,call the UST coordinator at the <br /> the end tank(s).(See FIGURE 3-3 and FIGURE 3-8.) Xerxes plant nearest you. <br /> 3.6.3.2.Pressurize the end tank(s)to 5 psig[3 psig for a <br /> 12-foot-diameter tank].Allow the pressure to stabilize b adding <br /> Lifting Lug Typal Service Filing <br /> 1 p Y 9 Typ cal Manway with F ttings Monitor <br /> or removing air as necessary. optional Fitting <br /> —�Reservoir <br /> 3.6.3.3.Close the air-supply valve on the test manifold. <br /> Disconnect the air-Supply line. End Tank Base Tank End Tank <br /> 3.6.4.TEST OF DOUBLE-WALL BULKHEAD(S) 11 1h 1111 <br /> 3.6.4.1.After the primary and secondary tanks have been /I <br /> Flat <br /> pressurized,install a 4-inch NPT plug with a 0-15 psig gauge Seam for — LBaseTafnk Seam rRib <br /> pressurized, <br /> (1/4-Ib.or 1/10-Ib.increments)into all monitor fittings leading End Tank End Tank <br /> into the double-wall bulkhead(s).(See FIGURE 3-9.) <br /> FIGURE 3-10 <br /> Air-Test Monitoring of Double-Wall Bulkhead(s) <br /> Air Test of Base Tank <br /> o• o• o• <br /> I C _j <br /> FIGURE 3-9 <br /> FIGURE 3-11 <br /> 3.6.5.EXTERNAL SOAP TEST <br /> 3.6.5.1.Soap the entire exterior of the tank,checking for leaks. Air rest of end Tank(s) <br /> (Follow instructions in Points 3.1.6.through 3.1.8.,including <br /> Warnings following 3.1.8.)Watch for active air bubbles,which <br /> s o• s <br /> indicate a leak.Pay special attention to fittings and manways. ' <br /> 3.6.5.2.Monitor the pressure for one hour. <br /> 3.6.5.3.Monitor all gauges for either a loss in pressure from the <br /> tanks or an increase in pressure in the bulkhead interstitial space. <br /> FIGURE 3-12 <br /> 3.6.5.4.After the test is completed,release all tank air pressure <br /> and remove gauges. <br /> Air-Test Monitoring of Secondary Tank <br /> 3.6.5.5.Replace the protective covers in the service fittings. <br /> r, • O - <br /> 3.7.TESTING A DOUBLE-WALL MULTICOMPARTMENT <br /> TANK WITH A DRY INTERSTITIAL SPACE <br /> CAUTION <br /> Do not connect air supply directly to the interstitial-space <br /> monitor fitting.Pressurizing the secondary tank(interstitial FIGURE 3-13 <br /> space)by itself may damage the primary tank or cause <br /> tank failure. 3.7.2.AIR TEST OF BASE TANK <br /> 3.7.1.GENERAL 3.7.2.1.Connect the pressure source to the test manifold on the <br /> 3.7.1.1.Remove all temporary service-fitting plugs. base tank.(See FIGURE 3-3 and FIGURE 3-11.) <br /> 3.7.1.2.Redope fittings and install plugs in all openings,except 3.7.2.2.Pressurize the base tank to 5 psig.Allow the pressure to <br /> one service fitting in each compartment(needed for the test <br /> stabilize by adding or removing air as necessary. <br /> manifolds).Follow instructions in Point 3.1.5. (See FIGURE 3-10 3.7.2.3.Close the air-supply valve on the test manifold on the <br /> and FIGURE 3-11.) base tank.Disconnect the air-supply line. <br /> 3.7.1.3.The tank will arrive with a quick-disconnect assembly. 3.7.2.4.Soap all service fittings and manways on the base tank. <br /> (See FIGURE 3-4.) Watch for active air bubbles,which indicate a leak. <br /> 8 <br />