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

  • HORTON CBI, LIMITED

    ASME S-3-Section I Boiler Manufacture (FIELD ONLY), ASME U-6-Sec. VIII, Div 1 Pressure Vessel Mfr. (FIELD ONLY), ASME U2-5-Sec. VIII, Div 2 Pressure Vessel Mfr. (SHOP & FIELD), Boilers & Pressure Vessels Repair/Alteration (FIELD ONLY), Power Piping Installation ASME B31.1 (FIELD ONLY), Process Piping Installation ASME B31.3 (FIELD ONLY)

  • HOWDEN CANADA INC

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

  • HP PIPING, LLC

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

  • HT INDUSTRIAL LTD.

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

  • HTS ENGINEERING LTD

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

  • HUBBARD MECHANICAL INC.

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

  • HYDROGENICS CORPORATION

    ASME U-3-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP ONLY), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • I COOL MECHANICAL 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), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD)

  • ICHOR INDUSTRIAL INC.

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

  • IEC FABRICATION

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

  • IMI INTERNATIONAL MANUFACTURING INC.

    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), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD), Boilers & Pressure Vessels Repair/Alteration (FIELD ONLY)

  • IMPERIAL OIL

    Pressure Relief Valve Repair (SHOP ONLY)

  • IMPERIAL OIL LTD

    Pressure Relief Valve Repair (SHOP ONLY), Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY), Owner/User Self Inspection of Repairs, Power Piping Installation ASME B31.1 (SHOP ONLY), Process Piping Installation ASME B31.3 (SHOP ONLY), CSA-B51 Fittings

  • IMPERIAL OIL NANTICOKE REFINERY

    Owner/User Self Inspection of Repairs

  • INDUSTRATECH INC.

    CSA-B51 Fittings

  • INDUSTRIAL BOILER SPECIALTIES LIMITED

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

  • INDUSTRIAL PIPING CO LLC

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • INDUSTRIAL TECHNOLOGIES & SERVICES AMERICAS INC.

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • INDUSTRIAL TRADE SOLUTIONS INC

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

  • INDUSTRIAL, PETROLEUM AND MINING SUPPLIES LIMITED O/A ECHELON SUPPLY AND SERVICE

    CSA-B51 Fittings

  • INDUSTRIOUS SOLUTIONS ONTARIO INC.

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

  • INFILTEK LIMITED

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