National Board Inspection Code (NBIC) 2021 Part 3

The National Board of Boiler and Pressure Vessel Inspectors. — Date of Issue July 1, 2021. — 322 p.This part provides requirements and guidelines that apply when performing repairs and alterations to pressure-retaining items.
The National Board administers four specific accreditation programs:
“R” — Repairs and Alterations to Pressure-Retaining Items
“NR” — Repair and Replacement Activities for Nuclear Items
“VR” — Repairs to Pressure Relief Valves
“T/O” — Test Only of Pressure Relief Valves
This part describes some of the administrative requirements for the accreditation of repair organizations.
Additional administrative requirements can be found
in:
NB-415, Accreditation of “R” Repair Organizations
NB-417, Accreditation of “NR” Repair Organizations
NB-514, Accreditation of “VR” Repair Organizations
NB-528, Accreditation of “T/O” Test Only Organizations
Requirements for repairs to pressure relief valves can be found in NBIC Part 4.