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

  • GREENFIELD SOUTH POWER CORPORATION

    Power Piping Installation ASME B31.1 (FIELD ONLY), ASME A-1-Section I Boiler Assembly (FIELD ONLY), Process Piping Installation ASME B31.3 (FIELD ONLY), Boilers & Pressure Vessels Repair/Alteration (FIELD ONLY), ASME PP-2-Section I Boiler External Piping (SHOP & FIELD)

  • GRIST, TURANO & ASSOCIATES 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)

  • G-TECH MANUFACTURING LTD.

    Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), 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), CSA-B51 Fittings

  • GUIDE VALVE LIMITED

    CSA-B51 Fittings

  • GURDEV SINGH MULTANI O/A JAZ MECHANICAL SERVICES

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

  • GWR MECHANICAL CONTRACTING INC.

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

  • H O TRERICE CO.

    CSA-B51 Fittings

  • H&R INDUSTRIAL SERVICES INC.

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

  • H. BUTTING GMBH & CO KG

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • HAGER INDUSTRIES INC

    Process Piping Installation ASME B31.3 (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), CSA-B51 Fittings

  • HALLER MECHANICAL CONTRACTORS INC

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

  • HAMILTON BOILER WORKS LIMITED

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

  • HAMILTON SMITH LIMITED

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

  • HAMMERSMITH COMPRESSED AIR LTD.

    Power Piping Installation ASME B31.1 (FIELD ONLY)

  • HAMPTON REGAL INDUSTRIAL GROUP INC

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

  • HARRINGTON PLUMBING & HEATING LIMITED

    Process Piping Installation ASME B31.3 (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD)

  • HASTINGS MECHANICAL 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)