COMPLIANCE INFO_2010-2014 - Laserfiche WebLink

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C 18.1 Vent Connections The Vent piping system requires the use of swivel couplings & fittings. Unlike supply piping connections OPW-FCS permits Vent swivel connections to be direct buried when properly protected. 18.2 Tank Connections Within Tank Sump If the tank's vent connection is con-tained within a tank sump, the vent line should enter through a flexible entry boot. A male or female adapter fitting should be used to complete the connection within. 18.3 Tank Connections Extractor Fitting If the tank's vent connection is not contained within a tank sump, then a male or female adapter fitting should be installed in the extractor fitting to accept the OPW- FCS Piping. The adapter and coupling/fitting should be properly protected. 18.4 Pipe Branch Connections In between the beginning and end of a Vent piping line it may be necessary to install tee fittings to interconnect numerous pipe runs into a main return line to the tank. For this application the coax junction tee or coax branch tee may be used. 18.5 Vent Stack Connections At the other end of a Vent" pipe line the pipe connects to a vent stack for tank vapor venting applications. This connection is made using an elbow fitted to the appropriate coupling. Metallic fittings may be wrapped with pipe tape to further protect the fitting components from corrosion. 19.0 TESTING & FILLING SUPPLY PIPE It is important to properly test the flexible piping prior to backfill to insure there are no leaks. The following test procedures are provided as a guideline only and the manufacturer assumes no responsibility or liability for the consequences of any testing practices. IMPORTANT: Integrity testing with air or gas can be dangerous and it is very important that the proper testing equipment be used and that the pre -testing procedures be read. 19.1 Testing Equipment 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 experienced and qualified personnel only. • The pressure gauge should be located in close proximity to the pressurizing equipment. • Pressure gauges must have a full scale reading not to exceed twice the required test pressure. 17 11 FlaxWORKS HY OPN/ SUEUMO CONTAINMENT SYSTEM$ Pressure gauges should be accurately and routinely tested for reliability. 19.2 Pre -Testing Procedures • The underground storage tank should be isolated from the piping system prior to hydrostatic or air testing. • Shear valves located under dispensers should be sealed with pressure rated plugs or caps. • Long flex piping runs should be secured at various points with backfill material. • All pipe coupling/swivel connections should be tightened securely before testing. • The interstitial (secondary) line should be interconnected and fitted with an air gauge. • All local building, safety and fire codes should be followed prior to and during testing. 19.3 Air Pressure Testing Procedures The air pressure integrity test procedure for the flexible supply piping is one and one half (1-1/2) times the normal 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 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 released. NOTE: Testing requirements must be in accordance with all applicable codes. 19.3.1 Air Pressurize Gradually apply air pressure into the flexible piping line. Do not exceed sixty pounds per square inch (60 psi) or 416 kPa. 19.3.2 Air Pressure Holding Maintain pressure for a minimum of three hours, making sure that there is no drop in pressure. Note: Significant temperature changes can result in a pressure reading differential. 19.3.3 Air Pressure Holding for Coax PRE -BACKFILL Maintain pressure for a minimum of three hours. POST -BACKFILL Maintain pressure for a minimum of three hours. NOTE: Do not close off or apply pressure to secondary jacket until primary pressure is maintained for a minimum of one hour. 19.3.4 Test Tube Gauge Check During pressurizing, check the reading on the test gauge which should be connected to the test tube of the inter- connected interstitial line. Any increase in pressure will indicate a leak. 19.3.6 Soap Test During the pressurizing period, apply a soapy water solution to all piping connections and inspect for bubbles.