ASME B31.1-2026

Current Revision
Power Piping

Best Price Guarantee Sep 11, 2026 English 1 Pages

Sub Total (1 Item(s)) $ 0.00
Estimated Shipping $ 0.00
Total (Pre-Tax) $ 0.00
View in Library
or
American Society of Mechanical Engineers Logo

Power Piping

PUBLISH DATE 2026

This ASME standard 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.

It 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).

Key changes to this revision include:

  • *New Mandatory Appendix Q - Quality Management Program Requirements for Metallic Nonboiler External Piping-Covered Piping Systems (NBEP-CPS)
  • *New Mandatory Appendix R – Documentation, Records, and Report Requirements for Metallic Nonboiler External Piping-Covered Piping Systems
  • *Adding reference to new Mandatory Appendix Q & R in the body of the Code
  • *Deletion of Mandatory Appendix D, mandating the use of B31J as only option
  • *Revised para. 137.2.1, Exposure of Joints, to require that joints be uncoated during a pressure test except when allowed by the owner
  • *Dynamic Effects paras. 101.5.2 Wind and 101.5.3 Earthquake revised to not allow the Allowable Stress Design factors to be applied;
  • *Revised para. 120.2.4 Supplementary Structural Steel to permit the allowable stress increases in para. 121.2(J)
  • *Addition of reference to API 579-1/ASME FFS-1 Fitness-For-Service in Mandatory Appendix F and Nonmandatory Appendix V with cautionary note for creep service, and metal loss in cycling service
  • *Addition of definition of Designer to para. 100.2
  • *Revised B31.1 for gender neutrality and removed gender bias terms
Loading...

Failed to load document history.

Publish Date Document Id Type View