Hydro Testing
Hydro Testing
(OP)
I am working in a new plant start up and we are using digital pressure gauges with charting capabilities for hydro testing our components. I have some experience with hydro testing with analog gauges. When testing with our digital gauges we get slight pressure variation (less than .2%) when testing and the customer witness will not pass the test. Our engineering department has not written a test procedure to let us know what is allowable. If anyone has a test procedure that references allowable pressure variation in hydro testing with digital gauges I would like to learn more about what others have done to solve this problem.





RE: Hydro Testing
RE: Hydro Testing
Reference DOT 49 CFR 178.37 as an example. under 3AA Pressure Vessels (Hydrostatic Testing)
The gage accuracy requirement is (1%).
Where does (0.2%)become a requirement?
You can find the above reference in Google.
To prove you are within the (1%) accuracy, you could place an analog gage with 1% accuracy in
the same line as the digital gage for a side by side comparison.
I hope this helps.
Bellows Manufacturing and Research, Inc.
https://bellowsmfg.com
RE: Hydro Testing
RE: Hydro Testing