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NBBI: safety since 1919


The National Board of Boiler and Pressure Vessel Inspectors (NBBI) was created in 1919 to promote greater safety to life and property through uniformity in the construction, installation, repair, maintenance, and inspection of pressure equipment.

The National Board membership oversees adherence to laws, rules, and regulations relating to boilers and pressure vessels. Its members are the chief boiler inspectors representing most states and all provinces of North America, as well as many major cities in the United States.


The National Board's functions include:

  • Promoting safety and educating the public and government officials on the need for manufacturing, maintenance, and repair standards.
  • Offering comprehensive training programs in the form of continuing education for both inspectors and pressure equipment professionals.
  • Enabling a qualified inspection process by commissioning inspectors through a comprehensive examination administered by the National Board.
  • Setting worldwide industry standards for pressure relief devices and other appurtenances through operation of an international pressure relief testing laboratory.
  • Providing a repository of Manufacturers’ Data Reports through a registration process.
  • Accrediting qualified repair and alteration companies, inservice Authorized Inspection Agencies, and owner-user inspection organizations.
  • Investigating pressure equipment accidents and issues involving code compliance.
  • Developing installation, inspection, repair, and alteration standards (National Board Inspection Code).

NBBI Boiler & Pressure Vessel Definition

NBBI Boiler & Pressure Vessel Image NBBI Boiler and Pressure Vessel Certification is a certification for the construction or repair of pressure equipment. The new construction certification verifies a manufacturer's or assembler's quality control system in accordance with the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC) Sections I, IV, and VIII. The repair certification follows quality control standards in accordance with the National Board Inspection Code (NBIC).

This certification is for companies who are involved in the design, fabrication, assembly, inspection, installation, or repair of boiler and pressure vessel components. Pressure equipment includes products such as power boilers, heating boilers, pressure vessels, fiber-reinforced plastic vessels, transport tanks, and valves.

Certification entails a review/survey of a company's quality manual and implementation of their quality program. The review/survey is performed by inspection agencies authorized by NBBI.

The National Board Inspection Code (NBIC) is issued every two years and is organized into four (4) parts. It is developed to maintain the integrity of pressure-retaining items by providing rules for installation (Part 1), and after the items have been placed into service, by providing rules for inspection (Part 2) and repair and alteration (Part 3), thereby ensuring these items may continue to be used safely. A Part 4 has been added to integrate the requirements for pressure relief devices.

Purchase the NBBI “National Board Inspection Code” (NBIC) as a package and take advantage of the savings! Take a look at the following product list.

National Board Inspection Code (NBIC)
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