The formula given provides some interesting results:
Assuming pressure to be 285 bar in a pipe of 20 m length and 4" internal diameter, the safe distance comes out to be 3.71 m. It does not appear rational.
Safety during Hydrotest
Re: Safety during Hydrotest
I believe that 3.71 m on each side of the whole piping circuit for safety purpose is enough for 4" dia line.
As a general rule, not following the formula, for any hydrostatic test, the safe distance our Safety guys recommends for barricade is 15-20 feet.
As a general rule, not following the formula, for any hydrostatic test, the safe distance our Safety guys recommends for barricade is 15-20 feet.
Re: Safety during Hydrotest
I second arcpro.
3.71 m = 12 ft approx.
It seems logical for water being incompressible fluid which depressurizes quickly.
I've searched a lot in response of IrfanAli's last post.
The fromula is from some Norweigan Specification (no soft copy or even Spec. No. avaiable yet or even any other similar document addressing this question)
Some useful tips (not rules) found:
- Don't stand in front of plugs.
- If hydrotesting above 6,000 psi, put the vessel in a pit cleared of personnel.
Queries are welcome.
Qaiser
3.71 m = 12 ft approx.
It seems logical for water being incompressible fluid which depressurizes quickly.
I've searched a lot in response of IrfanAli's last post.
The fromula is from some Norweigan Specification (no soft copy or even Spec. No. avaiable yet or even any other similar document addressing this question)
Some useful tips (not rules) found:
- Don't stand in front of plugs.
- If hydrotesting above 6,000 psi, put the vessel in a pit cleared of personnel.
Queries are welcome.
Qaiser
Re: Safety during Hydrotest
I also didn't find any reference of the said formula but to me 12 ft barricade distance for 4" pipe is reasonable.
Qaiser,
What do you say in case of piping?
Qaiser,
What do you say in case of piping?
Re: Safety during Hydrotest
The above formula seems logical for piping.
But if you are asking that what if a piping, instead of a vessel, is being hydrotested above 6,000 psi? as piping can't be put in a pit always.
I couldn't find any other reference / standard to address this issue.
But again I'd recommend to use the above formula for water being incompressible fluid.
I've come across a practical example of hydrotesting a 12" dia piping @ 287 bar with 15 ft barication around.
But if you are afraid of using the above formula, you may clear the area around as far as you can (preferably the whole site, you may do it in lunch break, etc.) & may put your inspection personnel behind a wall of specific strength or in a bunker. This is what we do for pneumatic testing on high pressures.
But if you are asking that what if a piping, instead of a vessel, is being hydrotested above 6,000 psi? as piping can't be put in a pit always.
I couldn't find any other reference / standard to address this issue.
But again I'd recommend to use the above formula for water being incompressible fluid.
I've come across a practical example of hydrotesting a 12" dia piping @ 287 bar with 15 ft barication around.
But if you are afraid of using the above formula, you may clear the area around as far as you can (preferably the whole site, you may do it in lunch break, etc.) & may put your inspection personnel behind a wall of specific strength or in a bunker. This is what we do for pneumatic testing on high pressures.
Re: Safety during Hydrotest
Thanks Qaisar for the elaborated reply.