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Exceeding B31.3 hydrostatic test pressure

Exceeding B31.3 hydrostatic test pressure

Exceeding B31.3 hydrostatic test pressure

(OP)
We have 304L SS piping systems with a low design pressure (dictated by installed components at 400 psig).  Nominal hydrostatic test pressure is ~ 600 psig (testing in accordance with paragraph 345).
Pressure surges caused by valve operation resulted in pressure exceeding 600 psig, but resultant stresses are still well below yield stress.  Can the system still be considered "qualified" if hydrostatic test pressure was exceeded (see paragraph 302.2.4(e)?

RE: Exceeding B31.3 hydrostatic test pressure

nuke2,
The paragraph 302.2.24(e) says the pressure surges shall not exceed the test pressure. Which part of this paragraph is less clear?

RE: Exceeding B31.3 hydrostatic test pressure

(OP)
Paragraph 302.4.2 is used to establish the system design pressure considering anticipated transients. When compared to the similar guidelines in B31.1 (see 102.2.4), there is no hydrostatic test pressure restriction. Once the system is placed in operation, B31.3 provides no guidance (see 300(c)(2)) - unlike B31.1 which has non-mandatory Appendix V.  So if a B31.3 system transient occurs and the hydrostatic test pressure is exceeded, what do you do? It seems the only logical choice is to ensure yield or allowable stresses were not exceeded.

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