Division 2 provides requirements on materials, design, and nondestructive examination standards. Division 1 addresses the requirements for design, fabrication, inspection, testing, and certification. Section VIII is divided into 3 sections, each of which cover different vessel specifications. It specifically refers to those pressure vessels that operate at pressures, either internal or external, that exceed 15 psig. It gives detailed requirements for the design, fabrication, testing, inspection, and certification of both fired and unfired pressure vessels. ASME Section VIII of the code is dedicated to pressure vessels. ASME publishes and maintains an International Boiler and Pressure Vessel Code (BPVC) that establishes acceptable margins of safety.