Max Stored Energy
Max Stored Energy
(OP)
Dear All,
Please could someone tell me , What is the max Energy Stored in Pipe volume (Calculated in ASME PCC-2–2008) that does not let us perform Pneumatic test of new piping. Knowing that we are converting some Test packs from Hydrotest to Pneumatic Test.
Regards,
Please could someone tell me , What is the max Energy Stored in Pipe volume (Calculated in ASME PCC-2–2008) that does not let us perform Pneumatic test of new piping. Knowing that we are converting some Test packs from Hydrotest to Pneumatic Test.
Regards,
RE: Max Stored Energy
-You can calculate the max. stored energy acc. to Mandatory Appendix II ( Article 5.1, Mandatory Appendix II
Stored Energy Calculations for Pneumatic Pressure Test )
- Follow the decision tree ( Fig. 1 Test Type Selection ) the criteria for max. stored energy alowable 271 MM-J..
- IMO, Pneumatic testing is not a good idea..
- pls look to the following doc.
RE: Max Stored Energy
Thank you for your valuable information, However I did not get the second point" Follow the decision tree ( Fig. 1 Test Type Selection ) the criteria for max. stored energy alowable 271 MM-J..[/highlight]".Please Clarify, and wherecan I find it?
Regards,
RE: Max Stored Energy
There may well have been an update and this is where you can find a=out all this information. Note you only need to consider 8m of pipe as a volume.
Fig 501-3.3-1 has this number in it. But isn't a yes /no, but you can do it if you do it "safely"
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Max Stored Energy
I am not sure which version you are looking..
A have copied and pasted the relevant page of ASME PCC-2–2011 (Revision of ASME PCC-2–2008) below. I hope , this would not be violation of copyright..
Still my opinion is , forget about pneumatic test .. and pls check your local safety codes for air test.
RE: Max Stored Energy
Many thanks for your collaboration. And special thank also to Mr LittleInch.
Regards,
RE: Max Stored Energy
This is similar to what happens when a pig is pushed down a open ended pipe with compressed air, it will launch out of the end of the pipe like a cannon shot, and can fly a looong ways.
I avoid pneumatic testing when possible.
RE: Max Stored Energy
Any connection can fail so plugs, instruments, can become like bullets.
Pigs powered by compared air have a long history of incidents causing death and destruction.
Whatever you do take care of yourself and others. And then think a third or fourth time about how to prevent injury in the event of failure.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.