What is the minimum nominal width for shell plates unless otherwise agreed upon?

• A. 60 inches
• B. 72 inches
• C. 84 inches
• D. 96 inches

Answer: (B)

The minimum nominal width for shell plates unless otherwise agreed upon is 72 inches. This specification is based on industry standards set by API 650, which governs the design and construction of welded tanks for oil storage. The specified width ensures that the shell plates have sufficient dimensions to maintain structural integrity and aid in the efficient assembly of the tank.

Wider shell plates are generally preferred as they reduce the number of welded joints, which can be potential points of failure. Choosing a width of 72 inches aligns with the standard practices in tank design, promoting both safety and efficiency in construction and maintenance.

Other width options may not conform to the general standards outlined in API 650, as they could either exceed typical manufacturing capabilities or not provide the necessary dimensional consistency needed for robust tank construction. Thus, the choice of 72 inches as a minimum nominal width is not only pragmatic but also aligns with industry best practices and regulatory guidelines.