API Series Flanges, ANSI Class, API Nominal Flange Sizes, Cross Reference Chart

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Series Flange Cross Reference Chart

Compares API Series designated flanges and ANSI, RTJ, Class designated flanges to current API Nominal designated flanges. See the Caution below the chart concerning the different rated working pressures of API and ANSI flanges.

API Series Flange Designation / ANSI Class

Current API Nominal Flange Sizes

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