Which of the following is NOT a method of attaching a bonnet to a valve body?

The method of attaching a bonnet to a valve body plays a crucial role in the design and functionality of the valve. The welding method involves permanently joining the bonnet and valve body through high-temperature fusion, providing a strong and leak-proof connection. Threaded connections utilize male and female threads for secure attachment that allows for ease of disassembly, making repairs or maintenance simpler. Flanged connections use flat surfaces with bolt holes that allow for a bolted fit, promoting easy installation and serviceability.

Interlocked connections, on the other hand, are not commonly recognized as a standard method for bonnet attachment. This term often refers to a mechanism involving safety interlocks in other contexts but does not describe a typical method used for physically attaching bonnets to valve bodies in standard engineering practices. Therefore, identifying interlocked as not a method aligns with the conventional understanding of valve design and construction methods.