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

  • CHEMETICS INC

    Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), ASME S-2-Section I Boiler Manufacture (SHOP & FIELD), ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Vessels, Pumps, Valves, Piping & Containment (N with NA), Supports (NS) (Can be added to N/NPT/NA), CSA-N285.0 Nuclear Fittings (SHOP ONLY), CSA-N285.0 Nuclear Fitting Repair or Modification (SHOP ONLY)

  • CHOHAN MACHINE TOOLS LIMITED

    CSA-B51 Fittings

  • CHUTE MECHANICAL INC

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD)

  • CIMCO A Div Of TOROMONT INDUSTRIES LTD

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

  • CIMS LIMITED PARTNERSHIP

    ASME S-2-Section I Boiler Manufacture (SHOP & FIELD), ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Hot Tapping and Line Stopping, Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Vessels, Pumps, Valves, Piping & Containment (N with NA), CSA-N285.0 Nuclear Fittings (SHOP ONLY), CSA-N285.0 Nuclear Item Repair, Modification or Replacement (FIELD ONLY)

  • CINTUBE LTD

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

  • CIRCA REFRIGERATION INC

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

  • CITY CORE MECHANICAL LTD

    Refrigeration Piping Installation ASME B31.5 (SHOP AND 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)

  • CITY OF OTTAWA

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

  • CIVILTEK LIMITED

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

  • CJ MECHANICAL INC.

    Refrigeration Piping Installation ASME B31.5 (FIELD ONLY)

  • CLARK KENNEDY COMPANY INC

    CSA-B51 Fittings

  • CLARK MULTI-TRADE CONTRACTORS INC.

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

  • CLASS 1 INC

    CSA-B51 Fittings, Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD)

  • CLAUGER CANADA INC.

    Refrigeration Piping Installation ASME B31.5 (FIELD ONLY)