B31.3 hydro
B31.3 hydro
(OP)
Is there any reason a gas line we should do a hydro vs a pneumatic test , normal fluid service.
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RE: B31.3 hydro
I think because it's not allowed to do the pneumatic test per 1.5 times of the design pressure...
RE: B31.3 hydro
RE: B31.3 hydro
RE: B31.3 hydro
For future reference, you'll get a better targeted audience for piping and pipeline issues at forum378: Pipelines, Piping and Fluid Mechanics engineering.
As moltenmetal pointed out, there is a substantial difference in the consequence of a failure when comparing liquid and air (or other gas) testing. Keep in mind that the reason we test something is because we expect that on occasion we will experience a failure. Otherwise there is no reason to test.
One reference for determining the explosive potential and safe distances for your proposed pneumatic test is ASME PCC-2 Repair of Pressure Equipment and Piping, specifically Article 5.1. I believe this article has been changed for the
20132014 edition which, depending on who one is to believe, is expected to be published sometime between "very shortly" and December.RE: B31.3 hydro
There are exceptions such as large size flare headers which only being tested pneumatically; because if it would be intended to be hydrotested on the relevant pipe rack, it's needed having huge foundation and structure can tolerate the load of such full of water headers...
RE: B31.3 hydro