If I do RT examinations of 100% of my pipe welds, do I get any exemptions for pressure/leak testing?

The short answer is no. Radiographic Testing (RT) and pressure testing (Hydrostatic or Pneumatic) serve two (2) fundamentally different purposes in piping integrity. While it might seem like “over-testing,” they are not interchangeable in ASME B31.3 (Process Piping) or ASME B31.1 (Power Piping).

Here is the breakdown of why 100% RT does not exempt you from a pressure test: