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).”

  • Clear Results

TSSA Registered Certificate Of Authorization

  • STUART OLSON INDUSTRIAL CONSTRUCTORS INC.

    CSA-N285.0 Nuclear Item Repair, Modification or Replacement (FIELD ONLY), CSA-N285.0 Nuclear Fittings (SHOP ONLY), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • SULZER PUMPS(CANADA) INC

    Vessels, Pumps, Valves, Piping & Containment (N with NA)

  • SUNNY CORNER ENTERPRISES INC

    CSA-N285.0 Nuclear Item Repair, Modification or Replacement (FIELD ONLY)

  • SUNWELL TECHNOLOGIES INC.

    CSA-B51 Fittings

  • SUPERIOR BOILER WORKS AND WELDING LIMITED

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), ASME S-2-Section I Boiler Manufacture (SHOP & FIELD), CSA-B51 Fittings, Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), ASME H-4-Section IV Boilers (SHOP & FIELD), ASME U2-3-Sec. VIII, Div 2 Pressure Vessel Mfr. (SHOP & FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD), ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD)

  • SURE FLOW EQUIPMENT INC

    Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY), CSA-B51 Fittings, ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY)

  • SUTHERLAND-SCHULTZ LTD

    ASME PP-2-Section I Boiler External Piping (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD)

  • SWENT FABRICATION + MACHINE LTD

    Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), CSA-B51 Fittings

  • SWIFT MECHANICAL SERVICE INC

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD)

  • SWM CONTRACTING INC.

    Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • T.D. WILLIAMSON CANADA ULC

    Hot Tapping and Line Stopping, Online Leak Sealing, ASME PP-2-Section I Boiler External Piping (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), CSA-B51 Fittings

  • T.I.G. STAINLESS INSTALLATIONS LTD O/A TIG STAINLESS SYSTEMS

    CSA-B51 Fittings, Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • TAILLEFER PLUMBING & HEATING INC.

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD)

  • TALON INDUSTRIES INC

    Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD), Boilers & Pressure Vessels Repair/Alteration (FIELD ONLY), Power Piping Installation ASME B31.1 (FIELD ONLY), Process Piping Installation ASME B31.3 (FIELD ONLY)