ASME B31.3-2020 (Revision of ASME B31.3-2018) Process Piping ASME Code for Pressure Piping B31 AN INTERNATIONAL PIPING CODE® The American Society of Mechanical Engineers ASME B31.3-2020 (Revision of ASME B31.3-2018) Process Piping ASME Code for Pressure Piping B31 AN INTERNATIONAL PIPING CODE⑧ The American Society of 2 Mechanical Engineers Two Park AvenueNew York NY10016USA Date of Issuance:June 18 2021 The next edition of this Code is scheduled for publication in 2022.This Code will bee effective 6 months after the Date of Issuance. ASME issues written replies to inquiries concerning interpretations of technical aspects of this Code.Interpretations are published on the Committee web page and under go.asme.org/InterpsDatabase.Periodically certain actions of the ASME B31 Committee may be published as Cases.Cases are published on the ASME website under the B31 Committee page at go.asme.org/B31mittee as they are issued. Errata to codes and standards may be posted on the ASME website under the Committee Pages of the associated codes and standards to provide corrections to incorrectly published items or to correct typographical or grammatical errors in codes and st...