Data Reports, Registration, and Accreditation Marks
This domain tests the paperwork and accreditation side of the code: manufacturer’s data reports, National Board registration, and the marks that authorize repair and pressure relief device work. The exam expects you to know which form, which signer, and which stamp apply.
Data reports and registration
The NB-1 form is the manufacturer’s data report for boilers; the NB-2 form is used for pressure vessels. Both record design and construction data and carry the manufacturer’s certification and the Authorized Inspector’s signature. Registration with the National Board assigns an NB number and preserves the record; it is not a substitute for inspection, and it is not mandatory in every jurisdiction unless the jurisdiction requires it. The nameplate and the data report must agree.
Accreditation marks
The National Board issues the R Certificate of Authorization and R stamp for repairs and alterations, and the VR Certificate of Authorization and VR stamp for repair of pressure relief devices. ASME construction stamps such as S and U authorize new construction, not in-service repairs. A stamp is valid only while the certificate is current and the scope of work is within the holder’s quality program.
Worked example
An R stamp holder repairs a boiler tube. The holder completes the repair report, obtains the AI signature, and distributes copies as NBIC and the jurisdiction require. If the same shop wants to repair a safety valve, it needs the VR stamp; the R stamp does not cover pressure relief device repair.
Traps
Assuming an ASME U stamp permits repairs. Using an expired certificate. Omitting the AI signature. Treating National Board registration as proof of current inspection. Confusing the NB-1 and NB-2 forms.