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API RP 751 - Safe Operation of Hydrofluoric Acid Alkylation Units

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API RP 751, Safe Operation of Hydrofluoric Acid Alkylation Units, is a recommended practice released by the American Petroleum Institute (API) that provides guidance to refinery operators on the safe operation of hydrofluoric acid (HF) alkylation units. RP 751 includes recommendations (“should”) and certain requirements (“shall”) on hazards management, operating procedures, worker procedures, material inspection and maintenance, transportation and inventory control, relief and utility systems, and risk mitigation. Moreover, the document provides additional information on the elements of a comprehensive HF audit, HF exposure limits, and corrosion & materials considerations specific to HF alkylation units.

RP 751 was originally released in June 1992, with the current 4th Edition published in May 2013. An updated 5th Edition is scheduled to be released in 2021. 

CLICK HERE to read about some of the key changes anticipated in the upcoming 5th Edition.

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