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€y Mir PEIIRP1200-17 �± #. 1 Termination fittings must be sealed u all piping 5. PIPING SECONDARY terminations, and test fittings must be accessible to �- CONTAINMENT INTEGRITYp rf�rrr� the test. TESTING Check with the piping manufacturer regarding �} testing procedures and the proper pressure before 6.1 General. Underground product pipiug is available testing. Testing requirements Stated it7 this recom- with single and double walls. Double-walled piping pro- mended practice are general statements and may a 3 vides containment for leaks from primary containment Y�Y Recommended pressure levels and test data- a and must be leak-free to prevent release of product into rionC are a6dressed in Section 5.3.5. Piping mann- w the environment. facturers' test procedures may differ. 5.2 Purpose. This rnetllod is used to test the integrity This test cart be conducted in seetir�ns or as one € continuous pipe depending on the insLal Iation.Care of piping interstitial space(s). should he taken to ensure that the entire secondary � 5.3 Testing Piping Under Pressure. containment of the piping system is tested. 5.3.1 Description of Test. The interstitial space 5.3.4 Test Equipment. Test equipment shall is sealed at the ends and is pressurized with an inert include: 5 gas. The pressure is monitored for 1 hour. If any inert gas scurce (nitrogen, helium, etc,); 5 pressure drop occurs, the secondary containment fails the test. stopwatch or other time-rneasum meat devise capable of measuring a 1-second increment; 5.3.2 Test Conditions. The primary, pipe may R contain fuel, and dispensing 9 []cities may Con- test tubing assetablies (Tubing assernblLes pia- S tinue during the test without affecting test results. vide access to the beginning and end of the interstitia] space,); 5.3.3 Preparation. If the interstitial space con- pressure gauge with a 15 prig maximum pres- tains product, ensure that the interstice is open to sure reading with 0.5 increments. the atmosphere and perforin a precision test on the primary piping before cunducOng a test an the sec- 53.5 Test Procedure. ondary cowair rrw piping, 1..If necessary, re-install termination (test)boots at piping terminations, 2,If necessary, connect the tubing assemblies to ' A the secondary containment termination fitting �i. on each end of the section of piping to be tested. 3.Connect the inert gas source and pressure gauge. - 4. Gradually pressurize the interstitial space to 5 prig_ Close rhe valve and allow the pressure to stabilize. Repressnrize to the specifted test pres- sure if necessary, S.Observe the pressure for a period of 1 hour. " G. If the piping pressure after 1 hour is less than the test pressure,check termination Fittings and test . assemblies for leaks. T.Release the pressure on the system slowly. S.Remove the test equipment. FIGURE 54., 80013 on piping rransitlorrs and through g.Restore the piping to its normal operating candi- surnp walls must be teak-tight when plpp rrg secordary tion. con toOment Otegrrty testing is pertormea. 0 peLarg