In Canada, many industrial piping systems must be registered with a Canadian Registration Number (CRN) before fabrication or installation. The requirement is set by provincial pressure equipment regulations based on CSA B51, which governs the registration of pressure equipment designs.

Unlike many countries, Canada often requires registration of the entire piping system, not only individual components.

When piping usually requires CRN

A piping system typically needs CRN if it:

• Operates above 15 psi (103 kPa)
• Contains compressed gas, steam, or pressurized liquid
• Connects to pressure vessels or boilers
• Is part of industrial process equipment or skid packages
• Is designed to codes such as ASME B31.3 (process piping) or ASME B31.1 (power piping)

Common examples include process plant piping, steam systems, refrigeration piping, and packaged equipment exported into Canada.

When piping may be exempt

Some systems may not require CRN, depending on provincial rules, including:

• Low-pressure piping below 15 psi
• Plumbing water systems
• Fuel gas systems governed by gas codes
• Certain instrument tubing

Because exemptions vary between provinces, confirmation with the authority or compliance specialist is recommended.

Why early review matters

Late CRN submissions often delay project schedules. Authorities may require:

• Design calculations
• Stress analysis for thermal expansion or loads
• Material specifications
• Professional engineer approval

Starting compliance review during the design phase helps prevent costly revisions later.

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Need help confirming whether your piping requires CRN?
ForeLong Consulting supports OEMs, EPCs, and project owners with Canadian pressure equipment compliance reviews and CRN submissions.