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pressure testing standards for hyd line

pressure testing standards for hyd line

pressure testing standards for hyd line

(OP)
I am looking for pressure testing standards, particularly analog chart resolution requirements.  How much percentage of a chart's scale should be considered acceptable (example: 7500psi test on 20,000psi chart is 37.5%)?  I would expect to use between 60 to 80%.  Is there a standard?

RE: pressure testing standards for hyd line

Remembering back to my instrumentation days, I think that in general, pressure measuring devices which utilize bourdon tubes, are at the highest accuracy between 30% and 80% of the range.  I think that most, if not all, analog chart recorders use bourdon tubes for pressure measurement.

However, it's been a long time, so I stand to be corrected on any or all of the above.

Cheers,

Snubengr

RE: pressure testing standards for hyd line

kruser:

I know of one standard that addresses this - API Spec 16C. During equipment tests, it requires that measurements be made in the range of 25% to 75% of the gauge full scale deflection.

Fracball

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