CRN Registration in Ontario

Ontario's CRN registrations are administered by the Technical Standards and Safety Authority (TSSA) under the Technical Standards and Safety Act, 2000 and Ontario Regulation 220/01. Every pressure-retaining design intended for installation or use in Ontario must be registered with TSSA and assigned a CRN before the equipment can be legally operated. This applies to both domestic manufacturers and international manufacturers exporting to Ontario. Learn more about what a CRN is and our CRN registration services.

What is TSSA?

The Technical Standards and Safety Authority is an arms-length regulatory body designated by the Government of Ontario to administer safety regulations for boilers, pressure vessels, and pressure piping, among other sectors. TSSA reviews design submissions, issues CRNs, and conducts inspections of pressure equipment operating in the province. TSSA is not a government department — it is a self-funded, not-for-profit organization that operates under a Memorandum of Understanding with the Government of Ontario.

For pressure equipment, TSSA's Boilers and Pressure Vessels Safety Program is the relevant division. All Ontario CRN applications for pressure vessels, boilers, fittings, and piping are submitted to and reviewed by this program. Submissions are reviewed against the applicable ASME Boiler and Pressure Vessel Code and CSA B51.

What Equipment Must Be Registered in Ontario?

All pressure vessels, boilers, fittings, and pressure piping systems operating in Ontario above the exemption thresholds defined in Ontario Regulation 220/01 require a CRN. This includes:

• Pressure vessels designed to ASME Section VIII Division 1 or Division 2
• Power boilers designed to ASME Section I
• Heating boilers designed to ASME Section IV
• Pressure piping designed to ASME B31.1, B31.3, or B31.5
• Fittings including flanges, valves, expansion joints, strainers, sight glasses, and custom pressure-retaining components
• Pressure relief devices

Exemptions exist for certain low-pressure, low-volume equipment, but the thresholds are narrow and should not be assumed without review. If in doubt, register.

Ontario CRN Registration Process

Step 1 — Prepare the Design Package

The submission must include complete design calculations per the applicable ASME code, fabrication drawings with full dimensions and materials, a bill of materials, weld details, and a Manufacturer's Data Report (MDR) or Manufacturer's Design Report (UDR) for Division 2 vessels. All documents must be in English.

Step 2 — P.Eng. Review and Stamping

A licensed Professional Engineer (P.Eng.) registered with Professional Engineers Ontario (PEO) — or holding equivalent interprovincial mobility — must independently review the design package and verify code compliance. The P.Eng. stamps, signs, and dates the submission documents, assuming professional liability for the adequacy of the design.

Step 3 — Submit to TSSA

The stamped package is submitted to TSSA's Boilers and Pressure Vessels Safety Program. TSSA accepts submissions electronically. The submission must include the CRN application form, the engineering review package, and the applicable filing fee.

Step 4 — TSSA Review

TSSA engineers review the submission for compliance with the referenced ASME code and Ontario regulations. They may issue Requests for Information (RFIs) or technical comments requiring revisions. Once all comments are resolved and the design is accepted, TSSA issues the Ontario CRN.

Ontario CRN Fees

TSSA charges fees on a time-and-materials basis for design registration reviews. For a typical single pressure vessel registration, expect total TSSA fees in the range of $500 to $2,000 depending on complexity and the number of review cycles required. These fees are separate from the P.Eng. engineering review fees charged by your consulting engineer. Total project costs including engineering preparation, P.Eng. review, and TSSA filing for a standard Ontario vessel registration typically range from $4,000 to $12,000.

Timeline for Ontario CRN Registration

Typical TSSA review timelines range from 4 to 8 weeks for straightforward submissions with complete documentation. Complex designs, Division 2 vessels requiring FEA review, or submissions with incomplete documentation can take 10 to 16 weeks. The single most effective way to reduce timeline is to submit a complete, well-prepared package the first time — every RFI cycle adds 2 to 4 weeks.

Ontario CRN for International Manufacturers

International manufacturers exporting pressure equipment to Ontario must meet the same registration requirements as domestic manufacturers. The design must be reviewed and stamped by a Canadian P.Eng., and the submission must comply with both the ASME code and Ontario-specific regulatory requirements under O. Reg. 220/01.

Common challenges include differences between international material specifications and ASME-referenced materials, drawing format and dimensioning conventions, documentation language requirements (English only), and unfamiliarity with TSSA's specific submission format and review expectations.

Ontario CRN and Multi-Province Registration

An Ontario CRN is valid only in Ontario. If your equipment will be used in other provinces, separate CRN registrations are required in each jurisdiction. A multi-province registration strategy should be planned from the outset to avoid duplicating engineering work. See our CRN registration services page for details on all-province coverage, or explore our Alberta CRN guide and BC CRN guide.

Frequently Asked Questions

How long does an Ontario CRN last?

An Ontario CRN does not expire. It remains valid as long as the registered design is not modified. Any change to materials, dimensions, pressure ratings, or weld details requires a new registration or an amendment to the existing CRN.

Can I use my Ontario CRN in Alberta or BC?

No. Each province issues its own CRN. An Ontario CRN is not valid in Alberta, British Columbia, or any other province. However, the engineering review work done for the Ontario submission can be adapted for other jurisdictions to reduce cost and time.

Do I need an Ontario CRN for equipment already ASME U-stamped?

Yes. The ASME U-stamp confirms the equipment was manufactured to ASME code standards. The Ontario CRN confirms the design has been reviewed and registered with TSSA for use in Ontario. Both are required.

What happens if I install equipment in Ontario without a CRN?

Operating unregistered pressure equipment in Ontario is a violation of the Technical Standards and Safety Act. TSSA can issue compliance orders, stop-use orders, and administrative penalties. Additionally, insurance coverage may be voided if an incident involves unregistered equipment.

Need to Register Equipment in Ontario?

Kopfkino Consulting handles end-to-end TSSA submissions for pressure vessels, boilers, and fittings. P.Eng. review, calculations, drawings, and TSSA coordination — from submission to CRN issuance.

Phone: 647-458-5536 | Email: info@kopfkino.ca

Dhruv Barot, P.Eng., C.Eng., PMP — Principal Consultant at Kopfkino Consulting Corp. Licensed P.Eng. in Ontario, Alberta, British Columbia, and Yukon with extensive experience in pressure vessel design, CRN registration, and ASME code compliance across pharmaceutical, industrial, oil & gas, and LNG sectors.