Current Interesting Link: Oil Field Flange History

From: <Paul>
Date: Sat Jan 31 2004 - 18:11:00 EST

I've added a new "Current interesting link" to the main page, titled
"Oil Field Flange History".

Here's an excerpt:

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"In the late 1930's, the American Petroleum Institute (API) adopted the
then ASA B16.5 flanges. For 720 psi and 960 psi applications API specified no changes to the ASA B16.5 Standard, using the 300 lb. and 400 lb. flanges respectively. For 2000, 3000, and 5000 psi applications, API specified an increase in material yield strength to the respective ASA B16.5 flanges: 600, 900, and 1500 lb.

API distinguished their flanges from the original ASA flanges through the method of changing the ASA term "lb." to the API term "SERIES", (e.g. ASA 4" 900 lb. flange, 2160 psi working pressure, compared to API 4" SERIES 900 flanges, 3000 psi working pressure), dimensionally the same but differing in name, material strength, and working pressure."

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Visit www.pipingdesign.com for the direct link to this offsite article. Received on Sat Jan 31 18:11:00 2004