Starting with Project B31 in March 1926, the first edition of American tentative Standard Code for Pressure Piping was published in 1935. In view of continuous industry developments and increases in diversified needs over the years, decisions were made to publish several sections of the Code for Pressure Piping. Since December 1978, the American National Standards Committee B31 was reorganized as theASME Code for Pressure Piping B31 Committee under procedures developed by the ASME and accredited by ANSI.
Presently, the following sections of ASME B31, Code for Pressure Piping are published:
ASME B31.1 - Power Piping
USAS B31.2* - Fuel Gas Piping
ASME B31.2 - Fuel Gas Piping
ASME B31.3 - Process Piping
ASME B31.4 - Liquid Transportation Systems for Hydrocarbons, Liquid Petroleum Gas, Anhydrous Ammonia, and Alcohol
ASME B31.5 - Refrigeration Piping
ASME B31.8 - Gas Transmission and Distribution Piping Systems
ASME B31.9 - Building Services Piping
ASME B31.11 - Slurry Transportation Piping Systems
* USAS B31.2 was withdrawn in 1988, but it is available for historical and reference purposes.
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