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).
ESS CORP
- Address:
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6115 SHAWSON DR
MISSISSAUGA, ON
Canada
L5T 1E4 - Products/Services:
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CSA-B51 Fittings
Status: 07-30-2025
Number: QA-03690
Fabrication of Welded and Non-Welded Category A, B, C, D, E, F, & H type fittings at the above location only. In accordance with CSA Standard B51 Boiler, Pressure Vessel and Pressure Piping Code.
Power Piping Installation ASME B31.1 (SHOP & FIELD)
Status: 07-30-2025
Number: QA-02394
Fabrication, assembly, and repair of power piping at the above location and fabrication, assembly, erection, and repair of power piping at field sites controlled by the above location in accordance with CSA Standard B51, Boiler, Pressure Vessel and Pressure Piping Code and ASME B31.1 Power Piping.
ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY)
Status: 07-30-2025
Number: QA-03166
Manufacture of pressure vessels at the above location only in accordance with ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 and CSA Standard B51, Boiler, Pressure Vessel and Pressure Piping Code.
ASME UM-2-Sec. VIII, Div 1 Miniature Pressure Vessels (SHOP ONLY)
Status: 07-30-2025
Number: QA-03167
Manufacture of miniature pressure vessels at the above location only (this authorization does not cover welding, brazing, or fusing) in accordance with ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 and CSA Standard B51, Boiler, Pressure Vessel and Pressure Piping Code.
Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY)
Status: 07-30-2025
Number: QA-02393
Repair and alteration of boilers, pressure vessels, piping, and fittings at the above location only in accordance with CSA Standard B51, Boiler, Pressure Vessel and Pressure Piping Code.
Process Piping Installation ASME B31.3 (SHOP & FIELD)
Status: 07-30-2025
Number: QA-02395
Fabrication, assembly, and repair of process piping at the above location and fabrication, assembly, erection, and repair of process piping at field sites controlled by the above location in accordance with CSA Standard B51, Boiler, Pressure Vessel and Pressure Piping Code and ASME B31.3 Process Piping.
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