NBIC NB23-1 2025 provides Part 1 of the 2025 National Board Inspection Code, focused on installation requirements for pressure-retaining equipment. This PDF includes general guidelines, certification and inspection requirements, boiler installation report guidance, and detailed installation provisions for power boilers, heating boilers, potable water heaters, pressure vessels, piping, and pressure relief devices.
The document also includes supplements addressing specialized applications such as Yankee dryers, pressure relief valves on steam pressure-reducing systems, liquid carbon dioxide storage vessels, biomass-fired boilers, and thermal fluid heaters. It is intended for inspectors, engineers, installers, jurisdictional authorities, facility owners, and compliance professionals working with boiler and pressure vessel installations.
Application Scope: Applies to installation practices and acceptance considerations for boilers, pressure vessels, piping, pressure relief systems, and selected specialized pressure equipment covered by NBIC Part 1 in the 2025 edition.
