The Canadian Registration Number (CRN) is required for:

The Canadian Registration Number (CRN) is essential specifically for pressure vessels and fittings within Canada. Each CRN serves as a unique identifier that indicates a pressure vessel or fitting has met national safety and engineering standards. This requirement is in place to ensure that these components are designed, manufactured, and tested according to the rigorous regulations set forth by the Canadian Standards Association (CSA) and provincial authorities.

When pressure vessels or fittings are utilized in various applications, including industrial processes, they must be registered to protect public safety and ensure compliance with engineering practices. This registration processes help maintain the integrity and functionality of the pressure systems in which they are installed.

Other choices incorrectly suggest that CRNs apply to all types of boilers, only high-pressure boilers, or solely heating systems, but the CRN requirement is specifically focused on pressure vessels and fittings, which encompass a broader range of applications than just boilers or heating systems.