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Associate

Join Date: Jan 2009
Posts: 42
Good Answers: 3

High Pressure Flanges

11/02/2009 7:21 AM

Hi Colleagues,

We have a design condition of 7260 psig (500 barg) just downstream of the wellhead. At 100 deg C and using group 1.2 material, ASME B16.5 only allows us to go to 429 barg (2500 pound Flange)

Does anyone know of any stronger ASME flanges, or is the solution to go for API 10,000 psi rating flanges?

PS I have Googled and Wiki'ed and have hit the buffers! Please help!

Thanks in anticipation

Stewie

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Anonymous Poster
#1

Re: High Pressure Flanges

11/02/2009 9:16 AM

You are in the API area why you want to diversify into ASME?

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Guru

Join Date: Apr 2006
Location: Cincinnati, Ohio, USA
Posts: 662
Good Answers: 48
#2

Re: High Pressure Flanges

11/03/2009 1:14 AM

ASME pressure ratings are typically at equivalent steam working temperatures and pressures. This is why "smaller" valves have two ratings- 150 PSIG (SWP) steam working pressure and 300 PSIG (WOG) water-oil-gas because of the higher strength when the metal is cool.

Your 100C condition is essentially "cool", so check flange ratings using air or water in pipes. Obviously, the 10,000 PSIG will work, but at what cost?

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Associate

Join Date: Feb 2008
Posts: 47
Good Answers: 1
#3

Re: High Pressure Flanges

11/03/2009 8:12 PM

I've just see your question. Refer to ASME B16.5, the highest working pressure of #2500 valve is 6250psi. So you have to looking for solution in API 6A.

Best Regard!

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cvt_82
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Associate

Join Date: Jan 2009
Posts: 42
Good Answers: 3
#4
In reply to #3

Re: High Pressure Flanges

11/03/2009 10:55 PM

Thanks a lot.

Puts my mind at ease.

Stewie

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