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ENVIRON PRODUCTS 9199996739 03/31/04 1O:01am P. 005 ... �. ._ _ Flexible r ' • • • Piping Manual environ, 16.22 Disconnected Connector Tubes experienced and qualified personnel only. After initial integrity testing has been completed,the • The pressure gauge should be located in close proximity connector tubes can be disconnected if interstitial to the pressurizing equipment. product flow is desired from sump to sump.One end Pressure gauges must have a full scale reading not to in each dispenser sump should be disconnected from exceed twice the required test pressure. the test boot. • Pressure gauges should be accurately and routinely NOTE:Dispenser sump leak detection is required to tested for reliability. monitor the integrity of piping,when the connector tubes are disconnected. 18.2 Pre-Testing Procedures • The underground storage tank should be isolated from 17.0 INSTALLING CROSSOVER the piping system prior to hydrostatic or aerostatic testing. SUPPORTS • Shear valves or riser pipes located under dispensers Crossover supports should be „ ,., should be sealed with pressure rated plugs or caps. used at all locations where ''?S`'`,. • Long flex piping runs should be secured at various flexible pipe crosses over points with backfill material. another flexible pipe and at any rigid piping or conduit '' s • All pipe coupling/swivel connections should be crossovers.These two-piece tightened securely before testing. supports are installed to both the • The interstitial(secondary)line should be upper and lower flexible pipe interconnected and fitted with an air gauge. sections.They must be installed before backfill begins. . All local building,safety and fire codes should be They are designed to provide a flat crossover surface followed prior to and during testing. for the upper pipe and also allow for even backfill compaction around both flexible pipes. 18.3 Air Pressure Testing To install,align upper and Procedures lower support as shown In The air pressure integrity test - ai9 illustration and fasten together ' s: procedure for the flexible supply - - using the supplied clips. Be piping is one and one half ;r. certain not to scratch piping (1-112)times the normal while installing clips. operating pressure of the submersible pump,not to exceed sixty pounds per square inch (60 psi). Make sure the flexible pipeline is isolated from both the underground storage tank and the above 18.0 TESTING&FlLUNGground product dispenser when conducting this test. SUPPLY PIPEiii= .< All pressure testing should be conducted by qualified It is important to properly test the ',,�++'" `. and experienced personnel. Do not attempt to disconnect GeoFlex°and GeoVentTM flexible couplings,caps,or plugs unless the air pressure has Piping priorto backfill to insure been released. there are no leaks. The following .® . test procedures are provided `, $ NOTE:Testing requirements must be in accordance with as a guideline only and the all applicable codes. manufacturer assumes no ,€, responsibility or liability for 18.3.1 Air Pressurize the consequences of any Gradually apply air pressure into the flexible piping line. testing practices. Do not exceed sixty pounds per square inch (60 psi)or 416 kPa. IMPORTANT: Integrity testing with air or gas can be dangerous and it is very important that the proper 18.3.2 Air Pressure Holding testing equipment be used and that the pre-testing Maintain pressure for a minimum of three hours,making procedures be read, sure that there is no drop in pressure. 18.1 Testing Equipment Note:Significant temperature changes can result in a pressure reading differential. • Pressurizing equipment should be of sufficient size to 183.3 Air Pressure Holding for Coax accommodate line pressure testing requirements. PRE-BACKFILL Maintain pressure for a minimum of three • Pressurizing equipment should have controls to gradually hours. POST-BACKFILL Maintain pressure for a minimum increase pressures. of three hours. • Pressurizing equipment should be operated by 23