Pneumatic testing
Pneumatic testing
(OP)
We are some months away from doing pneumatic testing, and doing as much sourcing as possible. We are up against a bit of a wall though. This may sound as if we are not professional but we need to source a TNT formula for our volume etc, we have contacted the safety authorities and codes..B31:3. But are not having much success. Can anyone guide us on the proper path? We understand the severity of this and will not proceed until everything is in place and we have proper approvals.





RE: Pneumatic testing
On my web page (address in the signature box below) I have a document on the "Samples" page that discusses many of the issues around static testing and the choice between hydrostatic and pneumatic tests. I've had really good feedback on it and I think it is the best committee-prepared document I've ever participated in.
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
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RE: Pneumatic testing
RE: Pneumatic testing
thread378-258605: pneumatic test ?
I think I'll visit zdas04's website as well. No doubt some good information there.
Regards,
SNORGY.
RE: Pneumatic testing
http://ca
jt
RE: Pneumatic testing
Thanks for providing the link. I must be getting meaner since last time I called the "point source" assumption "poppycock" this time I called it "crap". Either way, I don't buy it.
David
RE: Pneumatic testing
Besides, the revised term is easier to spell.
I know that the Regulatory Authorities in my region "bought" my energy per unit mass rationalization towards the computation of how far the pieces could fly if something blew up. If nothing else, it was creative.
Then again, I have been known to estimate check valve closure times in water hammer transient analyses by drinking beer out of a flip-top beer stein in the bathtub and then holding it under water to see how long it takes the lid to close.
Again, in that instance, the authors of the software commended my creative thinking.
Most of the stuff I do nowadays is towards developing suggested guidelines that other folks can at least "move forward" with if they can't spend the time or don't have the time to fully understand or apply the theory. I think as engineers we could all crunth the numbers if we had to.
I agree with you, though. In a long length of pipe that breaks "here", the hole usually stays approximately "here", but there's still a whole bunch of energy "over there" that has to "get here" before it's released. In other words, you are right: it's not one big "KABOOM" event.
Regards,
SNORGY.
RE: Pneumatic testing
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RE: Pneumatic testing
and
TNT = E*5.269*10-7 (lbs)
Is this formula over kill when it comes to pneumatic testing?? Thanks
RE: Pneumatic testing
wicltd11 - The formula you quote is similar, though slightly different to that given in PCC-2 (see link above). I believe in your "E" equation you meant to have ["natural log" P/Pa] instead of [In P/Pa].
jt