The Welding Sub
Mechanical Contractors Trust.
BoldArc is a trusted welding contractor in Calgary — the go-to subcontractor for mechanical companies who need Red Seal certified welders, high production, and near-zero rework on every job.
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.
Scale Up When You Need It
From 2 welders to a full 9-person multi-trade shutdown crew — welders, pipe fitters, plumbers, and helpers. We mobilize fast and scale to match your scope.
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.