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Pressure-Relieving Flange Gasket??
- Thread starter rkinga2
- Start date
Montemayor
Chemical
rkinga2:
This is a joke, right? Why would anyone install such an invention that isn't sanctioned by ASME instead of a standard PSV and risk having their industrial Insurance coverage revoked? Who would insure such an installation without the required learning and testing years required by ASME, Insurance, and other agencies? And what about all the PHAs and Hazops that it would have to get approval from?
I've never heard of such an idea although I've seen a lot of blown gaskets on over-pressured pipes. I'm interested in knowing if someone is seriously applying this concept.
Art Montemayor
Spring, TX
This is a joke, right? Why would anyone install such an invention that isn't sanctioned by ASME instead of a standard PSV and risk having their industrial Insurance coverage revoked? Who would insure such an installation without the required learning and testing years required by ASME, Insurance, and other agencies? And what about all the PHAs and Hazops that it would have to get approval from?
I've never heard of such an idea although I've seen a lot of blown gaskets on over-pressured pipes. I'm interested in knowing if someone is seriously applying this concept.
Art Montemayor
Spring, TX
Art,
I had to scratch my head also. My guess is that a "pressure-relieving flange gasket" is a name that some shady gasket company came up with for an inferior product.
If you want pressure relief in a piping system, you MUST MUST MUST MUST MUST install some sort of pressure relief valve.
Piping systems are not supposed to blow high pressure water out "by design" when they reach a certain pressure. That is called "failure" and a piping system should not intentionally be designed with the max possible operating pressure, plus some comfort margin, to be above the point at which the system will rupture.
Tim S.
I had to scratch my head also. My guess is that a "pressure-relieving flange gasket" is a name that some shady gasket company came up with for an inferior product.
If you want pressure relief in a piping system, you MUST MUST MUST MUST MUST install some sort of pressure relief valve.
Piping systems are not supposed to blow high pressure water out "by design" when they reach a certain pressure. That is called "failure" and a piping system should not intentionally be designed with the max possible operating pressure, plus some comfort margin, to be above the point at which the system will rupture.
Tim S.
Montemayor
Chemical
Tim:
I agree. I left out the most important item that I question - how would one go about collecting the discharge fluid out of such a device with a vent header? The special collection system required at every "safety" flange would cost more than a conventional pressure relief valve.
This is a joke.
Art Montemayor
Spring, TX
I agree. I left out the most important item that I question - how would one go about collecting the discharge fluid out of such a device with a vent header? The special collection system required at every "safety" flange would cost more than a conventional pressure relief valve.
This is a joke.
Art Montemayor
Spring, TX
- Thread starter
- #7
Whoa - guys...
I didn't mean to get everybody's blood pressure up!
The device was suggested as a low-cost solution for a situation that needs a rupture disc & someone thought that he had heard of such a gadget in the distant past.
Thanks for your comments.
I didn't mean to get everybody's blood pressure up!
The device was suggested as a low-cost solution for a situation that needs a rupture disc & someone thought that he had heard of such a gadget in the distant past.
Thanks for your comments.
Here is one possibility just add RD and drain, and hope the flange seal holds
I saw this approach being used. Actually a series of RD’s in a line using several bleed rings.
Montemayor I didn’t do either of the above and would have no part of it. Virgin Teflon will also act as a relieving gasket. We did have this have, not on purpose though.
I saw this approach being used. Actually a series of RD’s in a line using several bleed rings.
Montemayor I didn’t do either of the above and would have no part of it. Virgin Teflon will also act as a relieving gasket. We did have this have, not on purpose though.
The disc you speak of is called a bursting disc. It fits between two flanges. The flange open to the space has a threaded connection which can be piped to a safe position i.e. low level.
They used to be common in the UK, But i haven't seen one for a while although I think HWS cylinder manufacturers can still get them.
I can't see the need for one (apart from the fact that there are no movinmg parts or bits that can get gunked up and block)
I think two safety valves would be better than a SV and a bursting disc??
Friar Tuck of Sherwood
They used to be common in the UK, But i haven't seen one for a while although I think HWS cylinder manufacturers can still get them.
I can't see the need for one (apart from the fact that there are no movinmg parts or bits that can get gunked up and block)
I think two safety valves would be better than a SV and a bursting disc??
Friar Tuck of Sherwood
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