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Standard - ENTECH

Standard - ENTECH

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industrial users. The resulting 1939 edition contained standards for welding neck flanges (com-pleted in March 1937), 1500 lb flanges in the 14 in. through 24 in. range 2500 lb flanges and flanged fittings in the 1⁄ 2 in. through 12-in. range, and dimensions for a full line of ring joint flanges developed by the American Petroleum Institute.

  Flange

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