To:
Subject: Rated Pressure of 2" Nominal, Threaded, RTJ Flanges

Question:

If a companion flange has an R-24 ring groove and a 2� line pipe thread, what working pressure would the flange ring gasket and the 2" line pipe thread have? I have heard that no matter what the pressure rating of the flange, the R-24 ring gasket would only have a rated pressure of 3000 psi. I was also told that any 2" line pipe thread used on a flange could not be pressure rated at more than 3000 psi no matter what the pressure rating on the flange itself. If so, then all flanges sealed with an R-24 ring gasket, or having a 2" line pipe thread, would have a maximum working pressure of 3000 psi. Could you supply technical data to agree or dispute this?

Answer:

Operators may use R-24 ring gaskets for sealing 4 common flange connections, ANSI 2" Class 600 RTJ, 2" Class 900 RTJ, API Spec 6A 2" 3,000 psi and 2" 5,000 psi. All of these flanges have identical dimensions. The ANSI flanges have a lower material strength and lower working pressure. You can view the best information we have on this subject at:

http://www.woodcousa.com/flange/21163.htm

and

http://www.woodcousa.com/flange/21165.htm.

Be sure to view both pages and scroll down the full page, as much of what you want to know lies below the image.

To find the working pressure of 2" Internal line pipe threaded connections, Click Here.

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