Hot Tapping & Line Stopping
- Live connections on pressurized systems up to 12″
- TSSA QA-03336 — few contractors hold it
Mobile pipe welding, shop fabrication, and hot tapping for industrial, commercial, and institutional projects across the Greater Toronto Area.
International Mobile Welding Ltd. is a Nobleton, Ontario–based provider of mobile pipe welding, hot tapping, fabrication, machining, and millwrighting. What began in the mid-1960s with a teenager building spot welders by hand in Zagreb has grown into one of the region’s most relied-upon mechanical trades contractors — still family owned, still family run, and now in its second generation.
Our crews work throughout Toronto, Vaughan, King, Brampton, Mississauga, Richmond Hill, Markham, the wider GTA, and north into cottage country on process, power, and gas piping, boilers and pressure vessels, pump skids, structural assemblies, and repairs to failed lines. Our ownership brings a CSA N285 nuclear pressure boundary background, and we are working toward pressure vessel manufacturing certification. We hold six TSSA Certificates of Authorization — covering ASME B31.1, B31.3, and B31.5 piping, boiler and pressure vessel repair and alteration, hot tapping and line stopping, and the Alternate Piping Process for pressure piping inspection in Ontario — together with a TSSA Fuels Contractor Registration.
Every joint we make is completed by fully certified tradespeople working to TSSA and ASME/CSA requirements. SMAW, GTAW, and GMAW processes on carbon steel, stainless, and alloy piping.
Hot tapping is the safe, precise method of connecting to a pressurized pipeline without interrupting service. Ideal when a shutdown is not an option, or when a new branch connection has to go into a live line.
Our Nobleton shop lets us prefabricate large-scale mechanical, structural, and custom assemblies before they ever reach your site — cutting field hours, reducing congestion, and keeping your schedule intact.
One contractor for welding, fabrication, hot tapping, millwright, and machining work.
Where uptime, pressure ratings, and code compliance matter.
Six Certificates of Authorization plus a Fuels Contractor Registration, every one verifiable on a TSSA public register.
IMW is an industrial contractor. We work with manufacturing plants, institutional and commercial facilities, municipalities, utilities, and mechanical contractors — on code-governed piping, welding, hot tapping, and fabrication carried out under our TSSA Certificates of Authorization.
We do not take on residential or home repair work.
Send drawings and specs, or just tell us what you’re working on — our team will respond quickly.