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

  • VALE CANADA LIMITED

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

  • VALIANT MACHINE & TOOL INC

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

  • VALLEY MECHANICAL INC.

    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)

  • VALLEY REFRIGERATION LTD

    Refrigeration Piping Installation ASME B31.5 (FIELD ONLY)

  • VALMET(CHINA) CO LTD

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • VALVE INCHEM INC

    Pressure Relief Valve Repair (SHOP & FIELD)

  • VAMCO INC.

    Refrigeration Piping Installation ASME B31.5 (FIELD ONLY)

  • VAN DAM MECHANICAL CONTRACTING INC.

    Power Piping Installation ASME B31.1 (FIELD ONLY), Medical Gas Piping Installation CSA-Z7396.1 (FIELD ONLY)

  • VANGUARD MECHANICAL INC

    Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD)

  • VARI-THERM LTD

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

  • VEERJI COOLING COMFORTS INC

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

  • VELOCITY 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)

  • VENSHORE MECHANICAL LTD

    ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), CSA-B51 Fittings, 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), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD)

  • VERSATILE MILLWRIGHTS INC

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

  • VIPOND INC O/A VIPOND FIRE PROTECTION

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

  • VISION MANUFACTURING SOLUTIONS INC.

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

  • VITAL INDUSTRIAL SOLUTIONS INC

    Hot Tapping and Line Stopping, Online Leak Sealing, Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), CSA-B51 Fittings

  • VOGT ICE LLC

    Refrigeration Piping Installation ASME B31.5 (SHOP ONLY)