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

  • NEW EUROART S.R.L

    Process Piping Installation ASME B31.3 (SHOP ONLY)

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

  • NEWFAB LTD

    ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), 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), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • NIAGARA ENERGY PRODUCTS

    CSA-N285.0 Nuclear Fittings (SHOP ONLY), Supports (NS) (Can be added to N/NPT/NA), Vessels, Pumps, Valves, Piping & Containment (N with NA), ASME S-2-Section I Boiler Manufacture (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), CSA-B51 Fittings, Process Piping Installation ASME B31.3 (SHOP & FIELD), ASME PP-2-Section I Boiler External Piping (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY)

  • NIAGARA FASTENERS INC

    Material Organization (MO) (Can be added to N/NPT)

  • NIAGARA INDUSTRIAL MANTENANCE LTD.

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

  • NICHOLLS FABRICATORS INC.

    Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), ASME PP-2-Section I Boiler External Piping (SHOP & FIELD), CSA-B51 Fittings

  • NIJABAT CONTRACTING INC.

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

  • NORTH AMERICA CONSTRUCTION (1993) LTD

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

  • NORTH WALES MECHANICAL LTD

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

  • NORTHLAND GROUP OF COMPANIES LTD.

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

  • NORTHSTAR REFRIGERATION

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

  • NORTOWN REFRIGERATION LTD O/A NORTOWN AIR SYSTEMS

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

  • NOVA CHEMICALS (CANADA) LTD

    Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY), Power Piping Installation ASME B31.1 (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP ONLY), Owner/User Self Inspection of Repairs

  • NPL CANADA LTD.

    ASME PP-2-Section I Boiler External Piping (SHOP & FIELD), 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)

  • NUAIR MECHANICAL LTD.

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

  • NUCLEOM

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