![]() ![]() Most well-known are API RP 520 and API STD 521. The most common industry standards for relief systems come from the American Petroleum Institute. Lastly, there’s the Uniform Building Code for systems inside buildings. ASME also has ASME/ANSI B31.3, the Chemical Plant and Refinery Piping Code. OSHA also has OSHA 1910.106 for Flammable Liquids. There’s NFPA 30, the Flammable and Combustible Liquids Code. Local codes and requirements are in effect too. Department of Labor’s Occupational Safety & Health Administration (OSHA) in OSHA 1910.119, “Process Safety Management of Highly Hazardous Chemicals.” Next comes the Boiler and Pressure Vessel Code from the American Society of Mechanical Engineers (ASME). 2 Applicable Codes and Standards 2.1 Legal Requirements ![]() Relief of this overpressure in a plant is an ASME Code requirement and is necessary for loss minimization, energy conservation, and the protection of operating personnel, the public, the environment, and other nearby equipment. Overpressure is caused by the accumulation of material or energy within a process system that exceeds the design conditions of the equipment.
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