NBBI R Endorsement case studies
NBBI R Endorsement · Put your knowledge to work in context.
The NBBI R Stamp endorsement is the National Board's accreditation mark for organizations that perform repairs and alterations on boilers and pressure vessels. On the National Board site, the R Stamp sits alongside the NR, T/O and VR stamps in the Accreditation section, which signals that it is an organizational accreditation rather than a personal certification like the Certified Individual or Commissioned Inspector credentials. The NBBI R Endorsement case studies are 5 cases and about 2,979 words.
1Pending R Stamp With a Repair Job Already Sold
A fabrication shop holds ASME U and S stamps and has applied for an NBBI R stamp to repair fire-tube boilers. Its written QC manual was written for new construction: it references ASME Section IX for welding and ASME Section VIII for design, but it does not mention NBIC Part 3, repair reports, or the R stamp symbol.
641 words, about 3 min2Nozzle Addition Called a Repair by the Owner
An R stamp holder is asked to modify a vertical carbon-steel pressure vessel. The nameplate shows a maximum allowable working pressure of 150 psig at 300°F, a minimum design metal temperature of 20°F, and a shell thickness of 0.75 in.
600 words, about 3 min3Unlisted Orbital Weld Procedure and Expired Test Gauge
A repair organization's QC manual, revision 7, lists manual gas tungsten arc welding and shielded metal arc welding but not automatic orbital welding. In March, a certified welder used a new orbital welding procedure, qualified by procedure qualification record in January, to repair a 6-in.
616 words, about 3 min4R-1 Report Missing the Authorized Inspector Signature
An R stamp holder repaired a crack in the shell of a 250-psig steam boiler with a welded patch and post-weld heat treatment. The authorized inspector witnessed the final examination and reviewed the radiographs, but left the inspection agency before signing the R-1 report.
568 words, about 3 min5R Stamp Work in a State With Extra Requirements
A repair organization in State A holds an NBBI R stamp and repairs a watertube boiler installed in State B. State B requires the repair organization to notify the state boiler section before any welded repair and to use an inspector licensed by State B.
554 words, about 3 min