On Schedule.
Inspection-Ready.
Fully Insured.
One failed weld or a no-show welder can stop your whole crew. BoldArc is the welding subcontractor mechanical contractors call when delays aren’t an option — Red Seal & ABSA Grade B Pressure certified, a true specialty in stainless and mechanical piping, near-zero rework, and a documented safety program your clients can watch live.
What’s Actually On The Line
You’re Not Buying Welds.
You’re Buying Certainty.
When you hire a welding sub, the real risk isn’t the weld — it’s the delayed schedule, the failed inspection, the hot-work liability, and the sub you have to chase. BoldArc is built to take those risks off your plate.
Keep Your Schedule Intact
A no-show welder stalls every other trade. We show up when we commit, weld with near-zero rework, and keep your timeline — and your margins — protected.
Pass Inspection The First Time
Red Seal Journeyman, ABSA Grade B Pressure, and CWB all-position certified. First-pass quality means fewer cut-outs, less re-NDE, and no schedule hit from rework.
Stainless Done Right
Thin-wall Sch 10 stainless defeats most welders. It’s our specialty — TIG and stick, clean full-penetration roots purged or non-purged, no sugaring, inspection-ready.
One Welder-Fitter, Not Two Hires
We fit and weld the whole job — layout, fit-up, and final weld. One self-sufficient resource on your site instead of pairing a fitter with a welder and coordinating both.
Hot Work, Fully Insured
$5M commercial general liability with burning/welding/cutting covered through Lloyd’s. Certificates of insurance and additional-insured endorsements on request.
Safety You Can See
Clients get live access to our documented, Alberta-OHS safety program — inspections and signed forms, visible in real time. Most subs claim safety; we show it.
Who We Work With
The Go-To Welding Sub
for Mechanical Contractors
For the past three years, BoldArc has been a trusted welding subcontractor for leading mechanical companies across Calgary and Alberta. We show up certified, ready to work, and we deliver — every time.
Certified to Your Standards
Red Seal Journeyman. Grade B Pressure. CWB All Positions. F3-F4 Pipeline qualified. We meet every certification your contracts demand — no exceptions.
Production That Moves Your Schedule
20+ years on the tools in every welding environment means high output and near-zero rework. Your timeline stays intact. Your margins stay protected.
Welder-Fitters, Not Just Welders
We fit and weld the whole job — layout, fit-up, and final weld. And we scale from 2 welders to a full multi-trade shutdown crew when your scope calls for it.
What We Do
Calgary Welding Contractor —
Full-Service Welding & Mechanical Support
Mechanical Pipe Welding
Precision pipe welding for condo and commercial buildings. Mechanical rooms, complete pipe systems, in-position or prefabricated — whatever gets your job done fastest.
Stainless & Sanitary Welding
Specialty TIG welding on stainless for food-grade and sanitary applications. Full-penetration clean welds for food processing, industrial piping, and hygienic systems.
Structural Steel Welding
Dependable structural welding for buildings, catwalks, bridges, and large-scale steel. Airports, bridges, and industrial plants — CWB certified on every procedure.
Pipeline & Rig Welding
Truck-mounted rig welder deployable across Alberta. F3-F4 pipeline qualified, API 1104 procedures, cross-country and oilfield welding — from Calgary to Fort McMurray.
Ammonia & Refrigeration
Industrial refrigeration installations and upgrades — ammonia piping, unit replacements, and full system installs in food processing and industrial environments.
Industrial Shutdowns
Full multi-trade crews for plant shutdowns and turnarounds. Welders, pipe fitters, plumbers, and helpers — mobilized fast, working to spec, getting you back online.
We Don’t Just Work —
We Improve Your Process
Most crews weld pipe in position — one piece at a time, slow and inefficient. We look at the full scope and find a smarter path.
- Prefabricate and weld complete sections on the ground
- Lift and install full pipe racks in one shot
- Reduce time spent working at height
- Speed up overall installation timelines
- Minimize rework through precision planning
Less Labor.
Fewer Delays.
Your project stays on schedule. Your costs stay in check.
Projects That Prove It
Need a Welding Contractor in Calgary?
Tell us about your project — we respond within 1 business day.