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

  • INFILTEK LIMITED

    Power Piping Installation ASME B31.1 (SHOP & FIELD), ASME UM-1-Sec. VIII, Div 1 Miniature Pressure Vessels (SHOP ONLY), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • INNOPHOS CANADA INC.

    Process Piping Installation ASME B31.3 (SHOP ONLY), Boilers & Pressure Vessels Repair/Alteration (FIELD ONLY), Power Piping Installation ASME B31.1 (SHOP ONLY)

  • INNOVATIVE PIPE & WELDING INC

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

  • INNOVATOR INDUSTRIAL SERVICES INC

    Online Leak Sealing

  • INOX INDUSTRIES INC

    Process Piping Installation ASME B31.3 (SHOP & FIELD), ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), CSA-B51 Fittings, Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD)

  • INTECH MECHANICAL CONTRACTING LTD

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

  • INTEGRATED MECHANICAL SERVICES (2014) INC.

    Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), 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), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), ASME PP-2-Section I Boiler External Piping (SHOP & FIELD)

  • INTERNATIONAL MOBILE WELDING LTD

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

  • INVISTA (CANADA) COMPANY

    Pressure Relief Valve Repair (SHOP ONLY), CSA-B51 Fittings, Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Owner/User Self Inspection of Repairs, Power Piping Installation ASME B31.1 (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP ONLY), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), Pressure Relief Valve Repair (SHOP ONLY)

  • IRON STRIKE MOBILE WELDING & FABRICATION LTD.

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

  • IRS TRUCK & TRAILER REPAIR INC

    Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY)

  • IRVCON LTD

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

  • ISLIP FLOW CONTROLS INC.

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

  • ISS INDUSTRIAL SPECIALTY SERVICES CANADA ULC

    Hot Tapping and Line Stopping, Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Online Leak Sealing, CSA-B51 Fittings

  • ITAL WELDING INC

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