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

  • 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)

  • J & J MILLWRIGHTING 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)

  • J OSKAM STEEL FABRICATORS LTD

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

  • J. M. R. ELECTRIC LTD.

    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)

  • J.K. QUALITY WELDING 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), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD)

  • J.L. REFRIGERATION INC

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

  • JADE LOGIC BUILDING TECHNOLOGIES INC

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

  • JAS 3 HEATING COOLING REFRIGERATION LTD

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

  • JAY STEWART MECHANICAL 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)

  • JAYDEN'S 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)

  • JAYWAL MECHANICAL LTD

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

  • JBT FOOD & DAIRY SYSTEMS

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • JEBCO INDUSTRIES INC.

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

  • JIANGSU LIBERT INC

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • JOE WHITE TANK COMPANY, INC.

    Refrigeration Piping Installation ASME B31.5 (SHOP ONLY)

  • JOHN BEAN TECHNOLOGIES CORP

    Power Piping Installation ASME B31.1 (SHOP ONLY)

  • JOHN CRANE CANADA INC

    Material Organization (MO) (Can be added to N/NPT)

  • JOHNSON CONTROLS L.P.

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

  • JOHNSON MARCH SYSTEMS, INC.

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

  • JOHNSON PATERSON INC.

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

  • JOSH DANIEL GLOVER O/A MAINSTEEL

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