Which key reference material is used in API 650 design?

• A. ISO standards
• B. ASTM standards
• C. ASME guidelines
• D. API standards

Answer: (B)

The key reference material used in API 650 design is API standards. API 650 specifically outlines the requirements for the design and construction of welded tanks for oil storage, and it is part of the suite of standards published by the American Petroleum Institute (API). These standards detail various aspects of tank construction, including materials, design principles, fabrication, and testing methods.

While ASTM standards are relevant for the materials used in tank construction (such as steel specifications), they do not provide the comprehensive framework for design and fabrication that API 650 does. Similarly, ASME guidelines focus on pressure vessels and do not address the specific needs of tanks for oil storage in the same manner as the API standards. ISO standards, on the other hand, cover broader international standards and may not specifically pertain to the design of welded tanks as outlined in API 650. Thus, the use of API standards is essential for ensuring that the tanks meet industry-specific requirements for safety, performance, and regulatory compliance.