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8 Cards in this Set
- Front
- Back
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For Navy designed piping systems relief valves are set to lift at what pressure? |
108-112 of maximum system operating pressure (A 250 psi system, relief will be set at 275 psi) |
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For systems containing ASME vessels, the set pressure of the relief valve will be set at what psi? |
It will be set AT the maximum system operating pressure. (A 110 psi chamber, relief will be set at 110 psi) |
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Before a relief valve can be put into service, it must be hydrostatically tested at what pressure? |
150% of the maximum system operating pressure |
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What must be done if a hydrostatic test is to be done to a relief valve that has already be cleaned? |
Only filtered Grade B water should be used as the test fluid. |
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What information must be contained within the hydrostatic documentation? |
- Date test conducted - Who conducted the test - Required test pressure - Actual test pressure - Pass/Fail information - Signature of person conducting the test |
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What must be installed between the chamber hull and a relief valve and why? |
A gag, in the event the relief fails in the open position or leaks, the gag valve can be secured to stop the passing gas. |
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Teflon tape should not be used in systems with operating pressures above what psi? |
1500 psi |
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What must be identified on the relief valve tag? |
- Valve number - Set psi - Test date - Test Facility |
