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0 0 Secondary/ Containment System Installation TESTING RECOMMENDATIONS should not exceed the pressure rating of any component in FOR SECONDARY CONTAINMENT PIPING the piping system. It is the responsibility of the installer or customer to temporarily seal the system for testing. Secondary containment piping, 3" and 4" (75 mm and Test Pressure for Open System 100 mm)diameter sizes,can be pressure tested by installing an in-line tee with a pressure gauge and a nipple in the 3/4" Feet of Head" Test Pressure (psig) threaded outlet of a termination fitting. If the test piping is to 2 1.0 be installed temporarily, use care not to over tighten when 4 2.0 installing the steel pipe threads. Fiberglass threads may be 6 2.5 damaged when removing the steel threads if over tightened. Use soft-set, non-metallic thread dope only. 8 3.0 10 4.0 FGS recommends test- Fkx„k 12 5.0 ing 3", 4", and 6" (75, 100, `°"�� 'Highest point in system minus the lowest point in system. and 150 mm) secondary containment piping systems These test procedures are designed specifically for a with air at pressures not FGS Smith Fibercast system. FGS is not responsible for any to exceed 10 psig (0.069 10p,19 damage to "other" products in the systems such as rubber (0.069 A9Pa) MPa). The most convenient � boots, hoses, etc. Please contact the manufacturer of any place to introduce air for the Onon-FGS products for a maximum test pressure and time. containment piping pressure Do not exceed FGS recommendations. test is at the threaded outlet located on the termination fitting near the underground storage tank. It is advantageous Vacuum or Inert Gas Test Procedures to leave the system pressurized until the installation is Testing with vacuum and/or pressurized inert gases have completed to monitor for possible damage to the containment been successfully used with FGS Smith Fibercast piping piping system during additional construction. systems. Although helium testing in a closed atmosphere The low pressure and low volume of the secondary and at measured levels is useful, testing in the field with helium has shown inconsistencies when trying to identify containment piping system makes this air test a safe leak location. procedure if normal safety precautions are followed. Refer to air safety precautions on pages 13-14. REPAIR PROCEDURES Test Procedures for "In Service” Secondary For damaged pipe and for Containment UL Piping Systems to Include Open and leaking joints, FGS recommends Closed Systems. only the repair methods listed ,- below. Leaks can occur if Secondary Containment piping systems can be tested secondary containment joints after the line has been installed and in operation for a period are not properly bonded. Upon FiUingFkrW of time. All systems must be shut off before testing. It is completion of required repairs FIUIrg Fbmp recommended that where possible,the air input valve be in a and before putting the line back different location than the pressure gauge. Please read and into service, always pressure test the repair work according understand all safety instructions and considerations in to the procedures on this page to assure the integrity of the the FGS Smith Fibercast Installation Manual No. 82160 system. before testing. Replacing Leaking Clam Shell Secondary Closed System Containment Fittings (Do not use this procedure for FGS recommends testing 3" and 4"secondary containment containment crossovers.) open systems with air at pressures not to exceed 10 psig. Example: 900 Secondary Containment Elbow Pressure should be left on the system for a minimum of one hour. The test pressure should not exceed the pressure rating of any component in the piping system. Open System(Gravity Drain) FGS recommends testing 3"and 4" secondary containment open systems with air to the equivalent static head test pressure listed in Table 1. The pressure should be left on the system for a minimum of one hours. The test pressure 23