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

  • BWXT NUCLEAR ENERGY CANADA INC.

    Vessels, Pumps, Valves, Piping & Containment (N with NA), CSA-N285.0 Nuclear Fittings (SHOP ONLY), CSA-N285.0 Nuclear Fitting Repair or Modification (SHOP & FIELD), 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)

  • BWXT PRECISION MANUFACTURING INC.

    Vessels, Pumps, Valves, Piping & Containment (N with NA), CSA-N285.0 Nuclear Fittings (SHOP ONLY), CSA-N285.0 Nuclear Fitting Repair or Modification (SHOP ONLY)

  • C & E MECHANICAL 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), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • C. H. S. AIR CONDITIONING LIMITED O/A TEMP AIR CONTROL

    Refrigeration Piping Installation ASME B31.5 (FIELD ONLY)

  • C.H.A.M.P. ENGINEERING LTD

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

  • CAHILL CONSTRUCTORS LIMITED

    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), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), CSA-N285.0 Nuclear Fitting Repair or Modification (SHOP ONLY), CSA-B51 Fittings, Supports (NS) (Can be added to N/NPT/NA), CSA-N285.0 Nuclear Fittings (SHOP ONLY), Vessels, Pumps, Valves, Piping & Containment (N with NA), Shop Assembly (NA)

  • CALDECOTT MECHANICAL SERVICES

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), ASME PP-2-Section I Boiler External Piping (SHOP & FIELD)

  • CAMBRIDGE PRO FAB INCORPORATION

    CSA-B51 Fittings, Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • CAMECO CORPORATION

    Power Piping Installation ASME B31.1 (SHOP ONLY), Refrigeration Piping Installation ASME B31.5 (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP ONLY), Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY)

  • CAMECO CORPORATION - BLIND RIVER REFINERY

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

  • CAMECO FUEL MANUFACTURING INC.

    CSA-N285.0 Nuclear Fittings (SHOP ONLY), CSA-B51 Fittings

  • CAMERON STEEL INC.

    Process Piping Installation ASME B31.3 (SHOP & FIELD), ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), CSA-B51 Fittings, Power Piping Installation ASME B31.1 (SHOP & FIELD)

  • CAMUS HYDRONICS LTD

    ASME HLW1-Section IV Lined Potable Water Heaters (SHOP ONLY), ASME H-1-Section IV Boiler Manufacture (SHOP ONLY)