Re: Current Interesting Link: Oil Field Flange H

>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."
Matching geometry--makes me wonder how many million ANSI class 900 flanges were installed as API series 900 flanges and vice versa.

Christopher Wright P.E.    |"They couldn't hit an elephant at
chrisw@skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)