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

  • 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)

  • TAYLOR STAINLESS STEEL AND PROCESS PIPING INC.

    ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), 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)

  • TAYLOR-WHARTON AMERICA INC.

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • TECHNEL ENGINEERING INC

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

  • TECHNICA GROUP INC

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

  • TERRA INTERNATIONAL (CANADA) INC.

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

  • TESC CONTRACTING LIMITED

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

  • THE E.A.GROUP LTD

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

  • THE MECHANICAL GROUP INC

    Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD)

  • THE PASLIN CO

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

  • THE PROVEN GROUP INC

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

  • THE STATE GROUP INC.

    Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Hot Tapping and Line Stopping, Refrigeration Piping Installation ASME B31.5 (FIELD ONLY)

  • THE TRANE COMPANY - 1

    Refrigeration Piping Installation ASME B31.5 (SHOP ONLY)

  • THERMAL AIR SYSTEMS INC

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

  • THERMAL MECHANICAL SYSTEMS INCORPORATED

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

  • THERMAL TECH MECHANICAL LTD

    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)

  • THERMOGENICS INC

    Power Piping Installation ASME B31.1 (SHOP & FIELD), ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), ASME S-1-Section I Boiler Manufacture (SHOP ONLY), ASME H-4-Section IV Boilers (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD)

  • THERMON CANADA INC.

    CSA-N285.0 Nuclear Fittings (SHOP ONLY), CSA-N285.0 Nuclear Fitting Repair or Modification (SHOP ONLY), Power Piping Installation ASME B31.1 (SHOP & FIELD), ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP & FIELD), ASME U2-1-Sec. VIII, Div 2 Pressure Vessel Mfr. (SHOP ONLY), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), ASME S-1-Section I Boiler Manufacture (SHOP ONLY), ASME H-1-Section IV Boiler Manufacture (SHOP ONLY), CSA-B51 Fittings, Vessels, Pumps, Valves, Piping & Containment (N with NA)