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Flexible • - . . Piping 16.2 Connector Tubes the manufacturer assumes no responsibility or liability for the These short plastic tube assemblies connect one test boot to consequences of any testing practices. �. another to reroute the interstitial space of one flexible pipe section around a tee or connector fitting to the next flexible pipe section. IMPORTANT. Integrity testing with air or gas can be dangerous 16.2.1 Connected Connector Tubes and it is very important that the proper testing equipment be After initial integrity testing has been used and that the pre-testing completed, the connector tubes can procedures be read. remain connected if interstitial product flow is desired to run the length of the pipe line back to the ! 18.1 Testing Equipment LDS Pipe Line Sensor located in the tank sump. Pressurizing equipment should be of sufficient size to accommodate line pressure testing requirements. • Pressurizing equipment should have controls to gradually increase pressures. • Pressurizing equipment should be operated by 16.2.2 Disconnected Connector Tubes experienced and qualified personnel only. After initial integrity testing has been • The pressure gauge should be located in close proximity completed,the connector tubes can be to the pressurizing equipment. disconnected if interstitial product flow Pressure gauges must have a full scale reading not to is desired from sump to sump. One exceed twice the required test pressure. end in each dispenser sump should be Pressure gauges should be accurately and routinely disconnected from the test boot. tested for reliability. NOTE: Dispenser sump leak detection is required to monitor 18.2 Pre-Testing Procedures the integrity of piping, when the connector tubes are The underground storage tank should be isolated from disconnected. the piping system prior to hydrostatic or aerostatic testing. • Shear valves or riser pipes located under dispensers should be sealed with pressure rated plugs or caps. 17.0 INSTALLING CROSSOVER SUPPORTS • Long flex piping runs should be secured at various Crossover supports should be used �s points with backfill material. at all locations where flexible pipe All pipe coupling/swivel connections should be crosses over another flexible pipe and at any rigid piping or conduit tightened securely before testing. crossovers. These two-pieceThe interstitial (secondary) line should be supports are installed to both the V interconnected and fitted with an air gauge. upper and lower flexible pipe All local building, safety and fire codes should be sections. They must be installed before backfill begins. They are followed prior to and during testing. designed to provide a flat crossover surface for the upper pipe and also allow for even backfill compaction around both flexible pipes. 18.3 Air Pressure Testing Procedures The air pressure integrity test procedure To install, align upper and lower for the flexible supply piping is one and support as shown in illustration and one half(1-1/2)times the normal operating NOW fasten together using the supplied pressure of the submersible pump,not to clips. Be certain not to scratch piping exceed sixty pounds per square inch (60 while installing clips. psi). Make sure the flexible pipeline is isolated from both the underground storage tank and the above ground \ product dispenser when conducting this test. All pressure testing should be conducted by qualified and experienced personnel. Do not attempt to disconnect couplings,caps, or plugs unless the air pressure has been 18.0 TESTING & FILLING SUPPLY PIPE released. Environ recommends hydrostatic testing on all sumps after installation to check for proper sealing of joints and connection. It is important to properly test the GeoFlex and GeoVentTM flexible piping prior to backfill to insure there are no leaks. The NOTE: Testing requirements must be in accordance following test procedures are provided as a guideline only and with all applicable codes. 21