CNC Fiber Laser & Multi-Torch Plasma Cutting
Direct Tekla DSTV/NC1 import for high-thickness steel plates (up to 80mm) and 3-spindle CNC H-beam drilling lines with ±0.5mm hole tolerance.
HAI SON INDUSTRIAL PARK · 20,000 M²
40,000 TONS / YEAR CAPACITY
IAS AC472 · ISO 3834-2 · EN 1090 EXC3
Heavy Structural Steel Manufacturing & 12-Step QC Production Process
Located at Lot Q9–Q10, Hai Son Industrial Park, our 20,000 m² CNC manufacturing complex integrates high-precision plasma/laser cutting, automated H-beam assembly, SAW welding, and Sa 2.5 shot blasting.
PLANT EQUIPMENT & MACHINERY
Automated CNC Fabrication Lines
Hydraulic H-Beam Assembly & Twin-Wire SAW
Automated web-to-flange tacking, gantry Submerged Arc Welding (SAW) with Lincoln Electric power sources, and hydraulic flange straightening.
Automatic Z/C Purlin & Standing Seam Lines
Continuous CNC roll-forming lines with automated pre-punching and ink-jet part marking for high-tensile G450/Z275 purlins and Kliplok/Seamlock roofing.
8-Turbine Roller Conveyor Shot Blasting
Automated steel grit/shot blasting chamber achieving ISO 8501-1 Sa 2.5 cleanliness and 50–75 μm anchor profile prior to primer application.
Airless Spray Booths & Hot-Dip Galvanizing
Climate-controlled painting booths for Jotun, International, and Sherwin-Williams epoxy/PU/intumescent systems, plus ASTM A123 HDG up to 610 g/m².
In-House NDT & Trial Assembly Yard
Ultrasonic (UT), Magnetic Particle (MT), Penetrant (PT), PosiTector DFT gauges, pull-off adhesion testers, and full trial fit-up yard.
INSPECTION & TEST PLAN (ITP)
12-Stage Controlled Manufacturing Workflow
01
Raw Material & MTC Inspection
Verify EN 10204 3.1 Mill Test Certificates, heat numbers, chemical composition, and tensile yield strength.
02
CNC Cutting & Nesting
Automated CNC plasma, oxy-fuel, and fiber laser cutting directly from Tekla Structures NC1 files.
03
H-Beam Fit-Up & Tack Welding
Hydraulic assembly of web and flanges with strict camber, sweep, and squareness verification.
04
Submerged Arc Welding (SAW)
Full-penetration and fillet SAW welding by AWS D1.1 / ISO 9606 qualified welders.
05
Mechanical Flange Straightening
Eliminate thermal welding distortion to meet AISC 303 and MBMA dimensional tolerances.
06
Connection Plate Fit-Up & GMAW
Fit-up and welding of end-plates, stiffeners, gussets, and crane brackets using calibrated jigs.
07
Non-Destructive Testing (NDT)
100% Visual Inspection (VT) plus Ultrasonic (UT) and Magnetic Particle (MT) weld testing per AWS D1.1.
08
Shot Blasting (ISO 8501-1 Sa 2.5)
8-wheel turbine abrasive blasting to remove mill scale and establish surface roughness profile.
09
Primer & Intermediate Coating
High-pressure airless application of Zinc-Rich Epoxy / Alkyd primer with wet & dry film thickness checks.
10
Topcoat / Fireproofing / HDG
Polyurethane topcoat, intumescent fire-rated coating, or ASTM A123 Hot-Dip Galvanizing.
11
Final QC, Hard-Stamping & Barcoding
Piece-mark verification, QR barcode tagging, and complete MDR (Manufacturer Data Report) compilation.
12
Steel Rack Packing & Container Loading
Loading onto custom telescopic steel skids inside 40’ HQ/OT containers with fumigation & lashings.
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