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

  • CARDINAL SERVICES GROUP INC

    Process Piping Installation ASME B31.3 (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • CARMICHAEL ENGINEERING 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), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD)

  • CARTER-GRANT MECHANICAL SYSTEMS INC

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

  • CAST CONSTRUCTION INC.

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

  • CASTLE PLUMBING & HEATING INC

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • CATHERWOOD WELDING & BOILER SERVICE INC.

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

  • CCM CONTRACTING LTD.

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

  • CEDA FIELD SERVICES LP

    Online Leak Sealing

  • CEMENTATION CANADA INC

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

  • CENTRAL BOILERWORKS AND MANUFACTURING LTD

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

  • CENTRAL FABRICATING & WELDING

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

  • CENTRAL MACHINE & MARINE INC

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

  • CERTIFIED TRADE SOLUTIONS LTD.

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

  • CFT S P A

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • CHAMBERLAIN BUILDING SERVICES INC

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • CHARRON + CO. LTD.

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

  • CHART INC

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

  • CHART INC.

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • 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)