API 6A Classification of Flanges ?
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  • Accepted Answer

    Monday, April 08 2013, 12:38 PM - #permalink
    The hydrostatic test pressure is equal to twice the maximum working pressures for flanges of diameter below or equal to 14 inches. The test pressure is equal to 1.5 times the maximum working pressure for flanges of diameter equal to or greater than 16 inches.
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