The NBBI Code is a collection of specifications and guidelines specifically developed for the pressure vessel industry. It is distinguished by its detailed approach to ensuring safety, quality and efficiency in the design, manufacture and inspection of pressure vessels. Through precise requirements and recommendations, the NBBI Code helps to minimize risks and maximize the reliability of pressure vessels.

The NBBI Code is used by a variety of professionals within the pressure vessel industry, including manufacturing companies, engineers, maintenance professionals and inspectors. It is specially designed for those who work directly or indirectly with pressure vessels and must adhere to the highest safety and quality standards.

The US organization, National Board of Boiler and Pressure Vessel Inspectors (NBBI), develops the code, which plays a central role in the safety monitoring and standardization of pressure vessels and steam boilers. NBBI brings together experts and specialists who use their in-depth experience and comprehensive knowledge to ensure that the guidelines fulfil the latest technological and safety requirements.

NBBI maintains a close, cooperative partnership with the American Society of Mechanical Engineers (ASME). Both organizations work together to develop and implement safety standards and best practices for pressure vessels and steam boilers. While ASME is widely recognized for its design and manufacturing standards, NBBI focuses on the inspection and maintenance of these installations to ensure compliance with ASME safety guidelines.