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).
KHS USA, INC.
- Address:
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880 BAHCALL CR
WAUKESHA, WI
United States
53186 - Products/Services:
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Process Piping Installation ASME B31.3 (SHOP ONLY)
Status: 06-13-2025
Number: QA-05277
Fabrication, assembly and repair of process piping at the above location only in accordance with CSA Standard B51, Boiler, Pressure Vessel and Pressure Piping Code and ASME B31.3 Process Piping.
Power Piping Installation ASME B31.1 (SHOP ONLY)
Status: 06-13-2025
Number: QA-05276
Fabrication, assembly and repair of power piping at the above location only in accordance with CSA Standard B51, Boiler, Pressure Vessel and Pressure Piping Code and ASME B31.1 Power Piping.
Refrigeration Piping Installation ASME B31.5 (SHOP ONLY)
Status: 06-13-2025
Number: QA-05278
Fabrication, assembly and repair of refrigeration piping at the above location only in accordance with CSA Standard B52, Mechanical Refrigeration Code and ASME B31.5 Refrigeration Piping.
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