this code is original code and was a direct
development out of the boiler and subsequent code.A boiler needs pipe. both internally and externally. The internal pipe would come under the rules of section 1
And the external piping would come under B31.1. This piping is generally found in electric power generating stations it is typically transporting steam or water under
Elevated temperatures and pressure.it may be used in other heating and steam uses.
Paragraph 101.3 enumerates what it does not apply to.
Does not apply to