What governs nozzle reinforcement?

• A. UG-28 charts
• B. ASME VIII
• C. UG-16
• D. ASME B31.3

Answer: (C)

The idea being tested is where the rules for adding material around a nozzle are found in the ASME code. The specific guidance for nozzle reinforcement lives in the section of the Boiler and Pressure Vessel Code that deals with general requirements and features a dedicated clause for nozzle reinforcement. This part lays out how thick the reinforcement must be and how the transition between the nozzle, reinforcement, and shell should be arranged, so the local stresses around the opening stay within allowable limits under internal pressure and other loads. That focused guidance is why this option is the best answer: it directly governs the reinforcement around nozzles. Other references are broader (the overall vessel code or piping-specific rules) or pertain to other aspects, not the explicit reinforcement criteria for nozzles.