Impact on material after wrong pressure test
Impact on material after wrong pressure test
(OP)
What are the adverse effects on material, if equipment is pressure tested at twice the rated pressure by mistake. Is it advisable to do any NDTs to see the condition of the material?





RE: Impact on material after wrong pressure test
I would start with a structural analysis, determine how close you got to yield limits of the material, and where you did, get close, evaluate what type of NDT is available to perform.
RE: Impact on material after wrong pressure test
This Division does not specify an
upper limit for hydrostatic test pressure. However, if the
hydrostatic test pressure is allowed to exceed, either intentionally
or accidentally, the value determined as prescribed
in (c) above to the degree that the vessel is
subjected to visible permanent distortion, the Inspector
shall reserve the right to reject the vessel.
RE: Impact on material after wrong pressure test
RE: Impact on material after wrong pressure test
In my experience, a higher than normal hydrostatic test, even 2X design pressure at ambient temperature, usually presents no problem to pressure retaining items because of the margins used by code of construction rules in determining minimum thickness under pressure.
RE: Impact on material after wrong pressure test