C.M.R. 06, 096, ch. 695, app 096-695-D

Current through 2024-51, December 18, 2024

Appendix 096-695-D - Requirements for Hydrostatic (Liquid) Piping Tests

For Both Remote and Suction Pumping Systems:

1. Bleed all air or vapor pockets from the line before conducting the test.

2. Physically isolate piping from the tank prior to the test.

3. A leak rate of 0.1 gallons per hour or greater indicates a possible leak.

For Suction Systems:

4. Conduct the test at 50 pounds per square inch (psi) gauge or greater for not less than 1 hour.

For Remote Systems:

5. Close the emergency shut off valve.

6. Install a pressure gauge with a maximum 60 pounds per square inch (psi) gauge range which clearly shows gradations of 1 psi.

7. Start the pump, and record maximum pressure of 25 to 35 pounds per square inch (psi) gauge.

8. Seat the check and relief valves after ensuring that the test pressure will not exceed the set valve pressures.

9. Shut off the pump and record any pressure drop, for at least 1 hour.

NOTE: Flexible connectors should not be connected to piping during testing without the approval of the manufacturer of the flexible connectors.

C.M.R. 06, 096, ch. 695, app 096-695-D