Heavy Plate Welding Services - Certified Process, Documented Quality
When a weld fails, it fails months later - on your customer's site, under load, with your name on it. Our heavy plate welding service is built around one principle: if it isn't documented, it didn't happen. Every joint is welded under a qualified WPS, inside an ISO 3834 certified welding quality system, by welders qualified to the procedure they're running.
Send your weldment drawings for a free welding review - we'll calculate the CEV, flag hydrogen cracking risk, and tell you exactly what preheat and inspection regime your parts need.
What We Weld
- Medium and heavy plate fabrications - base frames, boom brackets, crane runway beams, column bases, gusseted connections
- Structural weldments to AWS D1.1 and AS/NZS 1554.1 requirements
- High-CEV steels - Q355, Q690, ASTM A572 Gr.50, ASTM A514 - where preheat discipline decides whether the part survives
- Combined thicknesses above 25mm - the zone where hydrogen cracking risk becomes real
The Preheat Discipline Most Shops Skip
A WPS that says "preheat 150°C" means nothing without enforcement. Inside our welding cell:
- Contact pyrometer verification - at least 25mm from the joint edge on both sides, or 1.5× plate thickness if greater, so the parent metal is soaked through, not skin-warmed
- Tack welds are not exempt - a cold tack is a crack starter that no post-weld preheat can undo
- Interruption protocol - if the arc stops for shift change or equipment fault, the joint is re-verified at preheat temperature before the next pass
- Low-hydrogen consumables - basic-coated electrodes held in rod ovens above 120°C from the moment the can opens
- Interpass ceiling - monitored, not guessed
- Postheat on high-risk joints - CEV above 0.55 or sections above 50mm get 250°C × 4h, with a time-temperature log you can audit
Documentation That Survives an Audit
Every batch ships with a weld file: the governing WPS, welder qualification records, preheat verification readings, interpass logs and visual inspection reports. If you're sourcing for Australian projects, this is the paper trail AS/NZS 5131 expects - and it's what separates a certified shop from a paper-compliant one.
Capacity
- 7,000㎡ fabrication facility in Qingdao, China
- Robot welding cells for repeatable long-seam work, certified manual welders for complex position welds
- Hot-dip galvanizing to AS/NZS 4680 for finished corrosion protection
- 7–15 day production lead times on most weldment programs
Frequently Asked Questions