Which code relates to mechanical refrigeration?

The reference to mechanical refrigeration is best aligned with CSA B52, which specifically addresses the design, construction, operation, and safety of refrigeration systems. This standard provides comprehensive guidance on the use and maintenance of various refrigeration technologies, ensuring safe and efficient operation within mechanical refrigeration systems.

In this context, CSA B52 includes provisions related to equipment performance, safety measures, and regulations that govern refrigeration cycles. This makes it an essential resource for professionals working with refrigeration systems, as it encompasses the principles and practices necessary to manage these systems effectively.

While other options like ASME MRC and CSA B51 pertain to related areas within mechanical code and boilers, they do not focus exclusively on mechanical refrigeration as CSA B52 does. ASME Section I is specifically about power boilers and does not cover refrigeration standards. Hence, CSA B52 is the most appropriate code that specifically addresses mechanical refrigeration.