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

  • BOMBEN PLUMBING & HEATING LTD.

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

  • BOPP & REUTHER VALVES GMBH

    Vessels, Pumps, Valves, Piping & Containment (N with NA), CSA-N285.0 Nuclear Fittings (SHOP ONLY), Nuclear Pressure Relief Valves (NV)

  • BOS INNOVATIONS INC

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

  • BRAMKAL CONTRACTORS INC

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

  • BRAMPTON PLATE & STRUCTURAL STEEL ROLLING INC.

    ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), CSA-B51 Fittings

  • BRANTWORTH MECHANICAL

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

  • BRENNER MECHANICAL INC

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • BRIGGS OF BURTON PLC

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • BRUCE POWER INC

    Pressure Relief Valve Repair (SHOP ONLY), CSA-N285.0 Nuclear Pressure Relief Valve Repair (SHOP ONLY), 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), 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), Refrigeration Piping Installation ASME B31.5 (SHOP ONLY), Pressure Relief Valve Repair (SHOP ONLY), CSA-N285.0 Nuclear Pressure Relief Valve Repair (SHOP ONLY)

  • BS & B SAFETY SYSTEMS LLC

    CSA Nuclear Class Rupture Disks

  • BUDZAR INDUSTRIES INC

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

  • BUHLER MECHANICAL SERVICE LTD.

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

  • BULLET TRADE SERVICES

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

  • BUTTING(TIELING) CO LTD

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • BWXT CANADA LTD

    Vessels, Pumps, Valves, Piping & Containment (N with NA), Shop Assembly (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 & FIELD), ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), ASME U2-3-Sec. VIII, Div 2 Pressure Vessel Mfr. (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), CSA-B51 Fittings, Power Piping Installation ASME B31.1 (SHOP & FIELD)

  • 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)