The National Board of Boiler & Pressure Vessel Inspectors is the worldwide leader in boiler & pressure vessel safety. The National Board is the worldwide leader in boiler & pressure vessel safety, promoting uniformity in the construction, maintenance, and repair of pressure equipment since 1919. The National Board's mission is to promote greater safety to life and property by securing concerted action and maintaining uniformity in the construction, installation, inspection, operation, repair and alteration of boilers, pressure vessels and other pressure retaining items and their appurtenances, thereby assuring acceptance and interchangeability among jurisdictional authorities.