The requirements for leakage tests are set forth in 49 CFR 180.407(h). When completing a leak test, suitable safeguards must be provided to protect personnel should a failure occur. Results of the inspection must be recorded and include any defects discovered and steps taken to remedy the defect.
The leakage tests include testing product in piping with all valves and accessories in place and operative, except that any venting devices set to discharge at less than the leakage test pressure must be removed or rendered inoperative during the test. CTs may be tested with HM contained in the CT during the test. CTs that fail to retain test pressure may not be returned to service as a specification CT until all sources of leakage are properly repaired.
For MC 330 and MC 331 tanks and non-specification CTs authorized under 173.315(k), visually inspect the delivery hose and piping system while the assembly is under leakage test pressure.93 Delivery hose assemblies not permanently attached to the CTMV may be inspected separately. In addition to a written report of the inspection, the RI conducting the test must note the hose identification number, the date of the test, and the condition of the hose assembly and piping system tested.
Leakage test pressure must be no less than 80 percent of the MAWP marked on the specification plate except as follows:
During the test:
Results of the inspection must be recorded and include any defects discovered and steps taken to remedy the defect
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