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).”
ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD)
Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)
Refrigeration Piping Installation ASME B31.5 (SHOP AND 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), 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), CSA-N285.0 Nuclear Item Repair, Modification or Replacement (FIELD ONLY), 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), Material Organization (MO) (Can be added to N/NPT), CSA-N285.0 Nuclear Fittings (SHOP ONLY), CSA-N285.0 Nuclear Item Repair, Modification or Replacement (FIELD ONLY), N Type Subcontracting
Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)
Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)
Process Piping Installation ASME B31.3 (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD)
Process Piping Installation ASME B31.3 (SHOP & FIELD), CSA-B51 Fittings
Power Piping Installation ASME B31.1 (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), CSA-B51 Fittings, Process Piping Installation ASME B31.3 (SHOP & FIELD)
Power Piping Installation ASME B31.1 (SHOP ONLY)
Medical Gas Piping Installation CSA-Z7396.1 (FIELD ONLY), Refrigeration Piping Installation ASME B31.5 (FIELD ONLY)
Refrigeration Piping Installation ASME B31.5 (FIELD ONLY)
Process Piping Installation ASME B31.3 (SHOP ONLY)
ASME S-2-Section I Boiler Manufacture (SHOP & FIELD), ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), ASME H-4-Section IV Boilers (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD)
Process Piping Installation ASME B31.3 (SHOP & FIELD), ASME S-3-Section I Boiler Manufacture (FIELD ONLY), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), ASME PP-2-Section I Boiler External Piping (SHOP & FIELD), CSA-N285.0 Nuclear Item Repair, Modification or Replacement (FIELD ONLY)