The Technical Standards and Safety Authority (TSSA) adopts standards and administers the policies, procedures and processes for the certification of welders and brazers regulated under the Technical Standards and Safety Act, 2000’s Ontario Regulation 220/01: Boilers and Pressure Vessels (BPVs). Businesses that repair/alter BPVs and install/repair associated piping systems are required to hold a Certificate of Authorization (COA) from TSSA or another Canadian jurisdiction. Companies with a National Board Certificate of Authorization (“R” stamp) are also acceptable for repairs/alterations of BPVs.
In the following directory, you can find a listing of businesses that hold a COA issued by TSSA. Please note that the information in this directory is updated periodically and may not reflect the most recent information available for each entry. If you have a question or concern regarding any of the information contained on this page, please contact customerservices@tssa.org or call 1-877-682-TSSA (8772).
ISS INDUSTRIAL SPECIALTY SERVICES CANADA ULC
- Address:
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854 UPPER CANADA DR
SARNIA, ON
Canada
N7W 1A4 - Products/Services:
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Hot Tapping and Line Stopping
Status: 03-21-2026
Number: QA-05515
Hot Tap and Line Stopping of pressure equipment at field sites controlled by the above location only in accordance with CSA Standard B51, Boiler, Pressure Vessel and Pressure Piping Code.
Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD)
Status: 03-21-2026
Number: QA-06063
Repair and alteration of pressure vessels, piping and Category H type fittings at field sites controlled by the above location only in accordance with CSA Standard B51, Boiler, Pressure Vessel and Pressure Piping Code.
Online Leak Sealing
Status: 03-21-2026
Number: QA-05516
Online leak sealing of pressure equipment at field sites controlled by the above location only in accordance with CSA Standard B51, Boiler, Pressure Vessel and Pressure Piping Code.
CSA-B51 Fittings
Status: 03-21-2026
Number: QA-05517
Fabrication of Welded and Non-Welded Category H type Fittings only at the Above Location Only. In accordance with CSA Standard B51 Boiler, Pressure Vessel and Pressure Piping Code.
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