Mobile Pipe Welding
- SMAW, GTAW, and GMAW processes
- On-site — no equipment transport
Process piping carries the fluids your operation actually runs on. We install, modify, and repair distribution systems in live plants and occupied buildings, working around production schedules rather than through them. Our work is covered by TSSA certificate QA-01698 for ASME B31.3 process piping installation, shop and field.
Stainless is where sloppy welding shows. Contamination from carbon steel tooling, heat tint from an unpurged root, or the wrong filler will all pass a visual inspection and then corrode in service — usually somewhere you cannot reach.
We run dedicated stainless consumables and grinding media, purge the root on critical welds, and TIG the passes that matter. The cooling tower shown here is entirely stainless — built as prefabricated spools on our shop floor, then set and connected on a live rooftop.
On stainless, the pass that decides whether a system lasts is the one on the inside of the pipe, where no inspector will ever see it. Shown here is a hand-fed GTAW pass on a stainless elbow — filler added deliberately, heat kept under control, and the back side purged so the root comes out clean rather than sugared.
It is slower than the alternative. It is also the difference between a joint that holds for decades and one that quietly corrodes from the inside out.
The spools shown here are a single stainless job, cut, fitted and welded on our floor before anything went to site. Working in the shop means proper fit-up, controlled purging, and welds a person can actually reach — none of which is true at height, in the wind, over a live building.
What arrives on the day is a numbered set of finished assemblies. The site work becomes bolting and connecting rather than fabricating, which is faster, safer, and far easier to inspect.
B31.3 is the ASME code for piping that carries process fluids inside industrial and processing facilities — process water and chemicals, chilled water, compressed gases and in-plant steam distribution. In Ontario, installing it requires a TSSA Certificate of Authorization. IMW holds QA-01698, shop and field.
Yes — 304 and 316/316L process and utility piping, with back-purged GTAW root passes on critical joints and segregated stainless tooling and grinding media to prevent carbon contamination. We also make dissimilar-metal transitions to carbon and copper systems.
Yes. Live tie-ins are made by hot tap where a shutdown is not practical, or by line stop where a section needs to be isolated.
ALT — TSSA certificate QA-10894 — allows qualifying pressure piping installations to proceed under our own TSSA-accepted quality program rather than routing every joint through individual field inspection. On qualifying work it removes an inspection scheduling dependency from the critical path. More on our authorizations.
Yes, and on most jobs it is the better answer. Spools are cut, fitted and welded in the Nobleton shop and delivered as a numbered set ready to hang. See pipe prefabrication.
Work we are usually asked about alongside process piping.
Send drawings and specs, or just describe the system — our team will respond quickly.