Safety: overpressure of vessel leading to its destruction
Safety: overpressure of vessel leading to its destruction
(OP)
Hello,
I'm working on a safety report for an experiment I'll be working for. It involve pressure vessel and pipes under pressure that will be heated. For the safety clearance, I need to demonstrate the effect of a "worst case scenario", that would be
1) Overpressure of the pressure vessel (propane tank) leading to it's destruction
2) Overpressure of the pipes (stainless steel and ceramics) leading to its destruction.
I have other worst case scenario but are not relevant to this forum / are already handled.
As I'm quite new to this stuff, I was wondering if you had paper / handbook that could help me to put numbers or demonstrate the effect that would occur in case of these two scenarios? So I can then size the eventual protection system for the experiment.
PS: I mentionned I'm using propane but I'm not interested in the part when propane and air is mixed, that has been handled. It's really the overpressure aftermath that I'm investigating.
I'm working on a safety report for an experiment I'll be working for. It involve pressure vessel and pipes under pressure that will be heated. For the safety clearance, I need to demonstrate the effect of a "worst case scenario", that would be
1) Overpressure of the pressure vessel (propane tank) leading to it's destruction
2) Overpressure of the pipes (stainless steel and ceramics) leading to its destruction.
I have other worst case scenario but are not relevant to this forum / are already handled.
As I'm quite new to this stuff, I was wondering if you had paper / handbook that could help me to put numbers or demonstrate the effect that would occur in case of these two scenarios? So I can then size the eventual protection system for the experiment.
PS: I mentionned I'm using propane but I'm not interested in the part when propane and air is mixed, that has been handled. It's really the overpressure aftermath that I'm investigating.





RE: Safety: overpressure of vessel leading to its destruction
RE: Safety: overpressure of vessel leading to its destruction
Thanks for your answer. I've been reading a few things about the subject, and am working with "Workbook for predicting pressure wave and fragments effect of exploding propellant tanks and gas storage vessels". This one seems to have some good things for me.
The purpose of the test is not to go to rupture, but I have to show that in the "worst case scenario" everything has been made to ensure security of personnel.
RE: Safety: overpressure of vessel leading to its destruction
E = 360PV{1-(14.7/P)} to the power of 0.286
Presure is in PSI, Volume is in cubic feet.
1 million ft-lbs is approximately = 1/2 lb of TNT.
NASA has developed safe distance equations/curves to be used during pneumatic testing based on the instantaneous release of stored energy, assuming possible rupture at a test pressure. I would advise using it to predict safe distances without additional blast protection measures.
RE: Safety: overpressure of vessel leading to its destruction
When looking in google, I find lot of different things but nothing that straightforward.
RE: Safety: overpressure of vessel leading to its destruction
Berkeley Laboratories, Health and Safety Manual - Stored Energy of a Pressurized Gas Vessel.
RE: Safety: overpressure of vessel leading to its destruction
Google NASA Glenn Safety Manual. Contains a lot of info that may be relevant to you. Stanweld has already provided the formula.
Ensure there is no electrical instruments (including mobile phones) close to the vessel. Also suggest that you prevent static charge build up. The NASA formula only takes pressure energy into account. It does not account for propane's chemical energy (in the case of an explosion).
Don't rush into this test without doing your homework thoroughly.
austsa
RE: Safety: overpressure of vessel leading to its destruction
RE: Safety: overpressure of vessel leading to its destruction
Patricia Lougheed
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RE: Safety: overpressure of vessel leading to its destruction