ASME B31.3-2020 (Revision of ASME B31.3-2018) Process Piping ASME Code for Pressure Piping, B31 A N I N T E R N AT I O N A L P I P I N G CO D E ® ASME B31.3-2020 (Revision of ASME B31.3-2018) Process Piping ASME Code for Pressure Piping, B31 AN INTERNATIONAL PIPING CODE Two Park Avenue • New York, NY • 10016 USA