Pressure vessels are found everywhere -- from basement boilers to gasoline tankers -- and their usefulness is surpassed only by the hazardous consequences if they are not properly constructed and maintained. This essential reference guides mechanical engineers and technicians through the maze of the continually updated International Boiler and Pressure Vessel Codes that govern safety, design, fabrication, and inspection. * 30% new information including coverage of the recent ASME B31.3 code