NBBI Authorized Inspector Supervisor (B) study materials
NBBI Authorized Inspector Supervisor (B) study resources

NBBI Authorized Inspector Supervisor (B) key terms

NBBI Authorized Inspector Supervisor (B) · Get comfortable with the vocabulary.

National Board Inspection Code (NBIC)

A consensus standard published by the National Board that governs the installation, inspection, repair, alteration, and registration of boilers and pressure vessels after they enter service, organized into Parts and Supplements.

Related: NBIC Part 1, NBIC Part 2, NBIC Part 3
NBIC Part 1

The NBIC section covering installation, including requirements for new construction installation, existing installations, and the acceptance of used equipment placed into service under a jurisdiction's rules.

Related: NBIC Part 2, Installation Permit
NBIC Part 2

The NBIC section addressing inspection of boilers and pressure vessels in service, including inspection frequency, scope, preparation, and the responsibilities of the inspector performing the work.

Related: Certificate Inspection, Internal Inspection, External Inspection
NBIC Part 3

The NBIC section covering repairs and alterations, including the requirements for repair organizations, welding, heat treatment, nondestructive examination, and documentation of the completed work.

Related: Repair Organization, Alteration, Form R-1
NBIC Part 4

The NBIC section on pressure relief devices, covering the selection, installation, inspection, testing, and repair of safety valves and relief valves for boilers and pressure vessels.

Related: Pressure Relief Device, VR Stamp
Authorized Inspector (AI)

A qualified individual holding a National Board commission who performs inspections and certifications on behalf of a jurisdiction or an authorized inspection agency, within the limits of that commission.

Related: Commission, Authorized Inspection Agency, Inspector Supervisor
Commission

The credential issued by the National Board that authorizes a qualified individual to perform inspections and apply the applicable stamps and certifications under the NBIC and the ASME Code.

Related: Authorized Inspector (AI), Commissioned Inspector, Stamp
Authorized Inspection Agency (AIA)

An organization accepted by the National Board and the jurisdiction to employ commissioned inspectors and provide inspection services, typically an insurance company, a state or municipal inspection authority, or an owner-user program.

Related: Owner-User Inspection Agency, Jurisdictional Authority, Authorized Inspector (AI)
Owner-User Inspection Agency

An inspection organization operated by the owner of boilers or pressure vessels that meets National Board criteria to employ commissioned inspectors and perform inspections on its own equipment.

Related: Authorized Inspection Agency (AIA), Commission
Jurisdictional Authority

The state, province, municipality, or other governmental body that has adopted boiler and pressure vessel rules and exercises legal control over installation, inspection, and operation within its boundaries.

Related: National Board Registration, Installation Permit
Inspector Supervisor

A commissioned individual responsible for directing and reviewing the work of authorized inspectors, ensuring inspection quality, consistency, and compliance with NBIC requirements and the agency's quality program.

Related: Authorized Inspector (AI), Quality Control Manual
Certificate of Authorization

A National Board document issued to an organization that demonstrates the capability to perform a specific activity, such as repairs, alterations, or relief valve servicing, and permits use of the associated stamp.

Related: R Stamp, VR Stamp, Repair Organization
R Stamp

The National Board symbol applied by a certificate holder to identify repairs and alterations to boilers and pressure vessels performed in accordance with NBIC Part 3 requirements.

Related: Repair Organization, Form R-1, Certificate of Authorization
VR Stamp

The National Board symbol applied to pressure relief devices that have been repaired, altered, or assembled by a certified valve repair organization in accordance with NBIC Part 4.

Related: Pressure Relief Device, Certificate of Authorization
Repair Organization

An entity holding a National Board certificate of authorization that performs repairs or alterations to boilers or pressure vessels in accordance with a written quality control manual and NBIC Part 3.

Related: R Stamp, Form R-1, Quality Control Manual
Quality Control Manual

A written document describing an organization's procedures, responsibilities, and controls for work governed by the NBIC, subject to review and acceptance as a condition of certification.

Related: Repair Organization, Inspector Supervisor
Form R-1

The National Board report used to document a completed repair or alteration, recording the scope of work, materials, examinations, and the certifications signed by the repair organization and the inspector.

Related: R Stamp, Repair Organization, National Board Registration
Form R-2

The National Board report used to document the servicing, repair, or alteration of a pressure relief device by a certified valve repair organization, including test results and set pressure.

Related: VR Stamp, Pressure Relief Device, Form R-1
Form R-4

The National Board report used to document the installation, inspection, or repair of a pressure relief device on a boiler or pressure vessel, recording device data and the inspector's findings.

Related: Pressure Relief Device, Form R-2
National Board Registration

The process by which a manufacturer or other party submits required data reports and drawings to the National Board so that a boiler or pressure vessel is recorded in the national database.

Related: Manufacturer's Data Report, Jurisdictional Authority, National Board Number
Manufacturer's Data Report

The certified construction record prepared by the manufacturer that documents design, materials, and tests for a boiler or pressure vessel and is submitted for registration.

Related: National Board Registration, National Board Number
National Board Number

A unique identifier assigned by the National Board when a boiler or pressure vessel is registered, used to trace the item's construction records and subsequent history.

Related: National Board Registration, Manufacturer's Data Report
Installation Permit

An authorization issued by a jurisdiction allowing a boiler or pressure vessel to be installed, typically conditioned on plans review and inspection before the item is placed in service.

Related: NBIC Part 1, Jurisdictional Authority
Certificate Inspection

An inspection performed as required by the jurisdiction for the purpose of issuing or renewing an operating certificate, conducted by a commissioned inspector and documented in the required report form.

Related: Internal Inspection, External Inspection, Operating Certificate
Internal Inspection

A detailed examination of the interior surfaces and components of a boiler or pressure vessel, performed while the item is open and prepared for inspection, to assess condition and integrity.

Related: External Inspection, Certificate Inspection
External Inspection

An examination of the accessible exterior of a boiler or pressure vessel and its appurtenances, performed without opening the item, to identify defects, leaks, or unsafe conditions.

Related: Internal Inspection, Certificate Inspection
Pressure Relief Device

A device such as a safety valve or relief valve that automatically relieves pressure before it exceeds a safe limit, protecting a boiler or pressure vessel from overpressure.

Related: VR Stamp, Form R-2, Set Pressure
Set Pressure

The inlet pressure at which a pressure relief device is adjusted to begin opening, verified during testing and recorded on the applicable report form.

Related: Pressure Relief Device, Form R-2
Alteration

A change to a boiler or pressure vessel that affects its pressure-retaining capability or safety, such as a change in design pressure, temperature, or a structural modification requiring documentation.

Related: Repair Organization, Form R-1
Repair

Work that restores a boiler or pressure vessel to a safe condition without changing its original design parameters, performed under NBIC Part 3 and documented by the responsible organization.

Related: Alteration, R Stamp
NBIC Interpretation

A formal written response issued by the National Board clarifying the intent or application of a specific NBIC requirement in response to an inquiry, used as guidance until the code is revised.

Related: Code Case, NBIC 2025 Edition
Code Case

A National Board publication that permits an alternative method or material not yet incorporated into the NBIC, subject to stated conditions and typically with an expiration or review date.

Related: NBIC Interpretation, NBIC 2025 Edition
NBIC 2025 Edition

The current edition of the National Board Inspection Code, incorporating revised requirements across its Parts and Supplements and taking effect on the date specified by the adopting jurisdiction.

Related: NBIC Interpretation, Code Case
Supplement

An NBIC section that adds requirements for a specific category of equipment or activity beyond the general Part requirements, such as supplements for fiber-reinforced plastic vessels or watertube boilers.

Related: NBIC Part 1, NBIC Part 2
Stamp

A symbol applied to equipment, components, or documents by a certified organization or inspector to certify that the work meets the applicable code requirements.

Related: R Stamp, VR Stamp, Commission
Operating Certificate

A document issued by a jurisdiction permitting continued operation of a boiler or pressure vessel, typically based on a satisfactory certificate inspection and valid for a stated period.

Related: Certificate Inspection, Jurisdictional Authority
Commissioned Inspector

An individual who holds a valid National Board commission and is therefore qualified to perform inspections and certifications under the NBIC within the scope of that commission.

Related: Commission, Authorized Inspector (AI)