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NFPA 51, titled "Standard for the Design and Installation of Oxygen-Fuel Gas Systems for Welding, Cutting, and Allied Processes," is a standard developed by the National Fire Protection Association (NFPA). It provides safety requirements for the design, installation, operation, and maintenance of oxygen-fuel gas systems used in applications such as welding, cutting, brazing, and heating.
The standard applies to both portable and fixed systems using flammable gases like acetylene, hydrogen, propane, or natural gas in combination with oxygen. NFPA 51 addresses essential safety practices related to gas storage, piping systems, regulators, pressure relief devices, and torch equipment to minimize the risk of fire, explosion, or gas leaks.
It includes requirements for ventilation, separation distances, cylinder storage, and protective equipment, aiming to protect personnel, property, and equipment in industrial, commercial, and educational settings.
NFPA 51 promotes safe handling and use of gases under pressure and ensures systems are installed and maintained to prevent hazardous conditions. The standard is commonly used by fabrication shops, construction sites, and educational facilities. The latest edition is NFPA 51, 2023, and it is available through the NFPA website.