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).”

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TSSA Registered Certificate Of Authorization

  • EKT 90 INC.

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

  • ELEMBE (LMB) MECHANICAL LTD.

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

  • ELITE COMMERCIAL HVAC-R INC.

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

  • ELLIS & WATTS GLOBAL INDUSTRIES INC

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

  • EMERSON ELECTRIC CANADA LIMITED O/A FISHER-ROSEMOUNT

    Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP ONLY), Power Piping Installation ASME B31.1 (SHOP ONLY), CSA-B51 Fittings, Vessels, Pumps, Valves, Piping & Containment (N with NA), CSA-N285.0 Nuclear Fitting Repair or Modification (SHOP ONLY), CSA-N285.0 Nuclear Fittings (SHOP ONLY)

  • EMPIRE THERMAL SYSTEMS INC.

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

  • ENCORE MECHANICAL & BUILDING SERVICES INC

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

  • ENERPRO BOILERS INC

    Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), ASME H-1-Section IV Boiler Manufacture (SHOP ONLY), ASME HLW1-Section IV Lined Potable Water Heaters (SHOP ONLY)

  • ENERVAC INTERNATIONAL ULC

    ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), Power Piping Installation ASME B31.1 (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP ONLY)

  • EPSILON INDUSTRIES INC.

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

  • EQUIPEMENT DE VAPEUR INDUSTRIELLE VAPTEC INC

    Pressure Relief Valve Repair (SHOP ONLY)

  • ERIE TECHNOLOGIES

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

  • ESS CORP

    CSA-B51 Fittings, Power Piping Installation ASME B31.1 (SHOP & FIELD), ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), ASME UM-2-Sec. VIII, Div 1 Miniature Pressure Vessels (SHOP ONLY), Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • EVANS INDUSTRIAL INSTALLATIONS LTD

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

  • EVAPCO, INC.

    Refrigeration Piping Installation ASME B31.5 (SHOP ONLY)

  • EXACT INDUSTRIAL LTD.

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

  • F.B. S.P.A.

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • F.M. IMPIANTI S.R.L.

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • FABMAR METALS INC

    ASME U-4-Sec. VIII, Div 1 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)

  • FALCON MECHANICAL & CONTRACTORS INC.

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