What standard is adopted for the construction of unfired pressure vessels?

The ASME Code, specifically the Section VIII of the ASME Boiler and Pressure Vessel Code, is the recognized standard for the construction of unfired pressure vessels. This code provides comprehensive guidelines and requirements to ensure the safety and performance of pressure vessels that do not operate under fire, covering aspects such as design, materials, fabrication, testing, and inspection. The ASME Code has been widely adopted within the industry due to its rigorous criteria and historical credibility, helping to ensure that pressure vessels are built to high safety standards to prevent failures that could lead to catastrophic events.

The other choices do not specifically address the construction of unfired pressure vessels. ISO 9001 pertains to quality management systems and does not focus solely on pressure vessel construction. DOT regulations are primarily concerned with the transportation of hazardous materials and may impact pressure vessels in that context, but they do not directly regulate the construction of unfired pressure vessels. NFPA standards relate to fire protection and safety but do not provide the specific construction guidelines that the ASME Code offers for unfired vessels. Therefore, the adoption of the ASME Code is crucial for ensuring that these vessels are safely and effectively constructed.