Hydrostatic Test Failure Analysis
Hydrostatic Test Failure Analysis
(OP)
I'm doing an analysis for hydrostatic testing failure modes. I need to know how to estimate the initial velocity of a hose coupling upon failure. I have all the data nessesary of the goemetry of the hose and the pressure at failure.
Thank you.
Thank you.





RE: Hydrostatic Test Failure Analysis
RE: Hydrostatic Test Failure Analysis
RE: Hydrostatic Test Failure Analysis
RE: Hydrostatic Test Failure Analysis
I'm struggling to work out why you're working this out though....
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Hydrostatic Test Failure Analysis
RE: Hydrostatic Test Failure Analysis
Instead of building a tougher chamber, get a competent test operator. It is simple to tell how much air is in the system; "How long did the pump run". Bet the answer for your catastrophic test was "Oh, about a minute or 3."
Other alternative to finding a competent test person is to have them use a hand pump. Now leaving air in the vessel causes them to work harder and longer. They will work diligently to evacuate ALL the air prior to pumping up to hydro pressure.
RE: Hydrostatic Test Failure Analysis
Timelord
RE: Hydrostatic Test Failure Analysis
That is not really true. Depending on the pressure, there can be significant energy stored in the the elastic expansion of a pressure vessel and the compression of a liquid. Worst case is that the object is propelled by by the test pressure. The pressure driving the projectile will have dropped very significantly by the time it has moved by one hole diameter (think, does a bullet accelerate after it leaves the muzzle?). The projectile will have moved one hole diameter in a small fraction of a second.
RE: Hydrostatic Test Failure Analysis
Mike Halloran
Pembroke Pines, FL, USA
RE: Hydrostatic Test Failure Analysis
Best regards,
AWloo
RE: Hydrostatic Test Failure Analysis