StacksVerified U.S. regulatory reference

49 CFR §192.105

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)The design pressure for steel pipe is determined in accordance with the following formula:
  2. (b)If steel pipe that has been subjected to cold expansion to meet the SMYS is subsequently heated, other than by welding or stress relieving as a part of welding, the design pressure is limited to 75 percent of the pressure determined under paragraph (a) of this section if the temperature of the pipe exceeds 900 °F (482 °C) at any time or is held above 600 °F (316 °C) for more than 1 hour.