hydrostatic pressure test acceptance criteria B31.3
hydrostatic pressure test acceptance criteria B31.3
(OP)
Anybody could advise a specific for hydrostatic pressure test acceptance criteria under ASME B31.3?
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hydrostatic pressure test acceptance criteria B31.3
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hydrostatic pressure test acceptance criteria B31.3hydrostatic pressure test acceptance criteria B31.3(OP)
Anybody could advise a specific for hydrostatic pressure test acceptance criteria under ASME B31.3?
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RE: hydrostatic pressure test acceptance criteria B31.3
https://www.google.com/#q=hydrostatic+pressure+tes...
Sometimes its possible to do all the right things and still get bad results
RE: hydrostatic pressure test acceptance criteria B31.3
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: hydrostatic pressure test acceptance criteria B31.3
The hydrotest is called a "leakage test", but in reality it's a pressure integrity test, carried out at a multiple of the MAWP which itself is a multiple of the maximum operating pressure. A subsequent leakage test at maximum operating pressure using another medium (i.e. a gas for lines which will be handling gases) may be required by the end user depending on the service, after all assembly is complete, but it is not a requirement of B31.3.
RE: hydrostatic pressure test acceptance criteria B31.3
Every inch of every weld is to be inspected for leaks. The hydro pump can run continuously, to maintain the test pressure. Valve packing leaks are acceptable, and to be expected -- packing is 'set' for normal operating pressure, not hydro pressure. So packing will leak or weep. Acceptable. Flanges with temporary gaskets may leak. Acceptable, but to be noted for rework prior to commissioning the system. Valves themselves may leak past the seat; acceptable, but if a leak-tight valve is needed, note this one for repair or replacement.
Starting to see why it is mandatory to get up off your butt and feel each weld joint for leakage? A successful hydro has nothing to do with 'watching the gauge' or disconnecting the pump and keeping pressure. Real world, there are many sources of acceptable leakage. Point of fact, I was part of the crew that hydro'd the turbine building Main Steam piping at a nuke, and due to 4 angled Stop Valves, we had 300 gpm of leakage past those valves. But that was our only leaks, and the test was acceptable. At 300 gallons per minute.
RE: hydrostatic pressure test acceptance criteria B31.3
RE: hydrostatic pressure test acceptance criteria B31.3
The plus side is that you can do a hydrotest /leak test quite quickly as you don't need to allow time for a small leak to show up as a pressure drop....
Totally agree with duwe6 - great post
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.