Gauge calibration and required gauges.

[albaweld]

Hello everyone, hope you all had a pleasant weekend. I'm looking to find where it references the requirement of two gauges when doing hydro testing. (high point--low point)This is for piping and so far I have had no luck in B31:3. Also the length of time when gauges should re-calibrated, is this in Sec V?
All help is greatly appreciated.
Thank you

 

[zdas04]

You've been around long enough that you should have noticed that many of us here get snarky with people who post "give me documentation" kinds of questions. For free, you get opinions. If you want documentation then you pay consulting fees. I for one never provide substantive answers to "prove it" kinds of quesitons. There are more than a few here who feel the same way.

Maybe someone will answer, but I have to say "good luck with that".

David