ASME Class 1

Class 1 components are in the Reactor Primary System, as in the items that circulate the reactor water. In a PWR, these are all in the reactor building, closed loop flow from reactor to steam generator to pump and back to reactor.

ASME Classes

• ASME Class 1
• ASME Class 2
• ASME Class 3
• ASME Class CC
• ASME Class MC