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

  • ALLIANCE FABRICATING LTD

    ASME S-1-Section I Boiler Manufacture (SHOP ONLY), ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), ASME U2-1-Sec. VIII, Div 2 Pressure Vessel Mfr. (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)

  • ALLIED MARINE & INDUSTRIAL

    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)

  • ALLTRADE INDUSTRIAL CONTRACTORS INC

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • ALL-WELD COMPANY LIMITED

    ASME S-2-Section I Boiler Manufacture (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), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • ALPHA REFRIGERATION LTD

    Refrigeration Piping Installation ASME B31.5 (SHOP ONLY)

  • ALPS WELDING LIMITED

    ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Power Piping Installation ASME B31.1 (FIELD ONLY), Process Piping Installation ASME B31.3 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • ALSPEC INDUSTRIES LTD

    CSA-B51 Fittings

  • A-MAC HEATING AND AIR CONDITIONING INC.

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

  • AMBIENT MECHANICAL LTD

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

  • AMG MECHANICAL INC.

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

  • AMICO CORPORATION

    CSA-B51 Fittings

  • AMIDYNE SOLUTIONS INC

    CSA-N285.0 Nuclear Fittings (SHOP ONLY), Material Organization (MO) (Can be added to N/NPT), CSA-B51 Fittings

  • ANCHOR RISK SOLUTIONS CORPORATION

    Authorized Inspection Agency CSA-B51 & CSA-N285.0

  • ANDERSON-WEBB LIMITED

    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), Hot Tapping and Line Stopping, ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), ASME PP-2-Section I Boiler External Piping (SHOP & FIELD), CSA-B51 Fittings

  • ANDRON STAINLESS LIMITED

    CSA-B51 Fittings

  • ANMAR MECHANICAL AND ELECTRICAL CONTRACTORS LTD

    ASME A-2-Section I Boiler Assembly (SHOP & FIELD), ASME PP-2-Section I Boiler External Piping (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), Process Piping Installation ASME B31.3 (SHOP & FIELD), Alternate Piping Process