I have asked for a formal response regarding this change, which was NOT noted in the 2021 edition as a change; however, it is a change in text and application.
In the 2018 edition, Chapter 50 stated:
| Piping, tubing, valves, and fittings conveying hazardous materials shall be designed and installed in accordance with ASME B31 or other approved standards, and shall be in accordance with Sections 5003.2.2.1 and 5003.2.2.2. |
In the 2021 edition, Chapter 50 states:
| Piping, tubing, valves, and fittings conveying hazardous materials shall be designed and installed in accordance with ASME B31.1 or other approved standards, and shall be in accordance with Sections 5003.2.2.1 and 5003.2.2.2. |
For those who may not be familiar with the ASME B31 series, 31.1 is for high-pressure piping, such as steam and water, for a boiler/heating system.
ASME states the following regarding the scope and application of 31.1…