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

  • TORION PLASMA CORPORATION

    CSA-B51 Fittings, Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), ASME S-1-Section I Boiler Manufacture (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • TORMAC MECHANICAL CONTRACTORS LTD

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

  • TORONTO TRANSIT COMMISSION

    Power Piping Installation ASME B31.1 (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP ONLY), Refrigeration Piping Installation ASME B31.5 (SHOP ONLY)

  • TORROVAP INDUSTRIES INC

    CSA-B51 Fittings

  • TOTAL ACCESS SOLUTIONS CORP. (TASC)

    CSA-B51 Fittings, Boilers & Pressure Vessels Repair/Alteration (FIELD ONLY), Online Leak Sealing, Power Piping Installation ASME B31.1 (FIELD ONLY), Process Piping Installation ASME B31.3 (FIELD ONLY)

  • TOTAL METER SERVICES INC

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

  • TOUCHSTONE BUILDING TECHNOLOGIES INC.

    Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • TRADE TECH MECHANICAL SERVICES INC

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • TRADE-MARK INDUSTRIAL INC.

    Hot Tapping and Line Stopping (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), CSA-B51 Fittings, ASME PP-2-Section I Boiler External Piping (SHOP & FIELD)

  • TRADITIONAL AIR SYSTEMS INC.

    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)

  • TRANE CANADA ULC

    Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • TRC LTD

    CSA-B51 Fittings, Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • TREL OF SARNIA LIMITED

    CSA-B51 Fittings

  • TRENERGY INC

    ASME S-2-Section I Boiler Manufacture (SHOP & FIELD), ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), ASME U2-3-Sec. VIII, Div 2 Pressure Vessel Mfr. (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)

  • TRIAD MEASUREMENT & EQUIPMENT INC

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • TRI-CANADA INDUSTRIES LTD.

    CSA-B51 Fittings

  • TRI-COUNTY STAINLESS LTD.

    Power Piping Installation ASME B31.1 (SHOP & FIELD), CSA-B51 Fittings, Process Piping Installation ASME B31.3 (SHOP & FIELD)