ASME B31.1-2022


Power Piping

Published by ASME International, 10/10/2022


All of our standards are available in PDF (Portable Document Format), an electronic, downloadable format.

Multi-User Access

After purchasing, you have the ability to assign each license to a specific user.


At any time, you are permitted to make printed copies for your and your members' reference use.

ASME B31.1, 2022 edition – Power Piping

ASME B31.1 prescribes minimum requirements for the design, materials, fabrication, erection, test, examination, inspection, operation, and maintenance of piping systems typically found in electric power generating stations, industrial and institutional plants, geothermal heating systems, and central and district heating and cooling systems.

ASME B31.1 also covers boiler-external piping for power boilers and high-temperature, high pressure water boilers in which steam or vapor is generated at a pressure of more than 15 psig [100 kPa (gage)]; and high temperature water is generated at pressures exceeding 160 psig [1,103 kPa (gage)] and/or temperatures exceeding 250 degrees F (120 degrees C).

What are the Referenced Standards for the 2022 Edition of ASME B31.1?

What are the key changes for the 2022 Edition of ASME B31.1?

  • New and updated figures for Code Jurisdictional Limits on Piping
  • Stress equation modifications to incorporate B31J Stress Intensification Factors into Chapter II and Appendix G
  • Addition of B31P as an alternative for heat treatment and minimum preheat requirements
  • New content in Chapter VI to allow NDE as additional alternative to hydrostatic testing on NBEP
  • Update Design Conditions to align with ASME B31.3
  • Clarification of visual examination requirements
  • New content on In-process Examination in Chapter VI Inspection, Examination and Testing
  • New content on Damage Mechanisms in Nonmandatory Appendix V

General Product Information:

Document Type PDF
ISBN 9780791875292
Pages 394
Document Language English
Publisher American Society of Mechanical Engineers (ASME)
Status Current


Document History