- (a) The requirements of this subpart refer only to system piping connecting to the external limits shown by ASME code in pressure vessels and boilers.
(b) ASME B31.1, as adopted, is the accepted code which prescribes the minimum requirements for the designing materials, erection, test, and inspection of power and auxiliary service piping systems for:
- (1) Electric generation stations;
- (2) Industrial and institutional plants;
- (3) Central and district heating plants; and
- (4) District heating systems.