NBBI administers three accreditation programs for organizations that perform repairs and alterations on pressure equipment (R, VR, NR) and one program for organizations that test pressure relief valves (T/O). Accreditation involves thorough evaluation of an organization’s quality system manual and requires a demonstration of its ability to implement the system. Authorized repair organizations are issued an NBBI stamp that is applied to the equipment nameplate. The stamp signifies strict repair and/or alteration requirements have been met and verified by an NBBI Commissioned Inspector.
A description of the scope, requirements, and estimated cost of each program is outlined in each section below:
- R Stamp — for the repair and/or alteration of boilers, pressure vessels, and other pressure-retaining items
- VR Stamp — for the repair of pressure relief valves
- NR Stamp — for the repair and replacement of nuclear components
- T/O Mark — for the inservice testing of pressure relief valves
Use of Marks Policy