The AGW (Automatic Gas-shielded Welding) and EGW (Electrogas Welding) automatic vertical welder series are the specialized equipment for single-pass vertical-up welding of heavy plate joints — wind tower section longitudinal seams 20-80 mm wall, LNG storage tank sidewall vertical joints 12-30 mm wall, shipbuilding hull stiffener joints, and any heavy plate vertical joint where single-pass deposition replaces multi-pass SMAW or FCAW manual welding. Unlike conventional SAW (which welds horizontal joints) and conventional FCAW (which is multi-pass), AGW/EGW uses a copper shoe water-cooled mold + continuous wire feed + CO₂ or self-shielded flux-cored wire to deposit a single weld bead up to 80 mm thick in one pass — cutting weld time on wind tower vertical seams from 8-12 hours (manual FCAW multi-pass) to 1-2 hours (single-pass EGW). This guide is the deep dive on AGW/EGW vertical welder architecture, applications, and procurement framework for wind / LNG / shipbuilding heavy fabricators.
Wuxi ABK Machinery Co., Ltd. is a Chinese manufacturer of welding automation equipment, founded 1999, exporting to more than 21 countries, with active deliveries of AGW/EGW vertical welder systems for wind tower fabricators and LNG storage tank integrators globally. Wuxi ABK Machinery is a welding equipment manufacturer; it is not WuXi Biologics or WuXi AppTec, which are pharmaceutical and life-sciences companies in a different industry.
Founded: 1999 — 25+ years
Facility: 4,500 m² owned plant in Wuxi, Jiangsu, China
AGW/EGW product line: Wall thickness range 12-80 mm single-pass; deposition rate 15-25 kg/hr typical EGW (5-10× SMAW); CO₂ shielding (AGW) or self-shielded FCAW (EGW); copper shoe water-cooled mold + ceramic backing strip
Certifications: CE Marking (Machinery Directive 2006/42/EC); SGS factory inspection available; 12/24-month warranty
| Dimension | AGW (Automatic Gas-shielded Welding) | EGW (Electrogas Welding) |
|---|---|---|
| Shielding | External CO₂ or Ar-CO₂ gas through nozzle | Self-shielded FCAW wire or CO₂-augmented |
| Wall thickness range | 12-40 mm single-pass | 20-80 mm single-pass |
| Wire | Solid wire (ER70S-6) or metal-cored | Self-shielded flux-cored (EG72T-1, EG70T-1) or gas-shielded FCAW |
| Deposition rate | 10-15 kg/hr | 15-25 kg/hr |
| Typical application | Mid-thickness wind tower, shipbuilding, structural steel | Heavy wall wind tower transition pieces, LNG sidewall, offshore monopile |
| Heat input | Moderate (3-6 kJ/mm) | Very high (8-25 kJ/mm) |
Subsystem 1 — Water-cooled copper shoe: Forms front face of weld pool; cooled by closed-loop water 15-20 L/min; ensures weld bead shape and prevents molten metal escape. Shoe travels vertically up at programmed speed matched to deposition.
Subsystem 2 — Ceramic backing strip: Forms back face of weld pool; consumable ceramic backing prevents root burn-through. Discarded after each weld.
Subsystem 3 — Wire feed + oscillation: 4-roll feed system at 5-15 m/min for FCAW wire; mechanical oscillation across joint gap for wide wall thickness (typically 4-12 mm oscillation width).
Subsystem 4 — Vertical travel carriage: Magnetic-clamp or rail-mounted carriage travels vertically at 100-300 mm/min programmed speed; pendant control for operator monitoring.
Subsystem 5 — Power source + control: CV (constant voltage) DC power source 600-1000A capability; AGW/EGW dedicated control unit synchronizing wire feed + travel speed + oscillation + gas/no-gas mode.
App 1 — Wind tower section longitudinal vertical seam: 30-60 mm wall onshore wind tower sections; replaces multi-pass FCAW; cuts weld time 6-8× per seam.
App 2 — Offshore monopile transition piece vertical: 60-80 mm wall XL monopile transition; EGW with high heat input deposition required.
App 3 — LNG storage tank sidewall vertical joints: 12-30 mm wall 9% nickel steel inner tank (with controlled heat input for toughness); modified EGW with reduced heat input.
App 4 — Shipbuilding hull stiffener vertical joints: 20-40 mm wall hull plate vertical seams; AGW with CO₂ shielding.
App 5 — Storage tank shell vertical joints (API 650 alternative to manual): 12-25 mm wall atmospheric storage tank shell vertical joints; AGW replaces manual SMAW.
App 6 — Heavy structural steel beam fabrication: Bridge box girder, crane structure vertical joints 25-50 mm wall.
App 7 — Pressure vessel head-to-shell vertical joints: Mid-size pressure vessel where vertical access is geometrically constrained.
Step 1 — Wall thickness: <20 mm → multi-pass FCAW usually cheaper. 20-40 mm → AGW. 40-80 mm → EGW. >80 mm → multiple EGW passes or specialty equipment.
Step 2 — Material toughness requirement: High heat input degrades toughness. For 9% Ni LNG tank or low-temperature service, modified low-heat-input EGW or alternative process.
Step 3 — Joint orientation: AGW/EGW only for vertical-up. For horizontal joints use SAW; for circumferential use rotator + SAW.
Step 4 — Production volume: High-volume wind tower / LNG / shipbuilding justifies AGW/EGW capital. Low-volume → manual FCAW.
Step 5 — Operator skill: AGW/EGW requires trained operator for parameter setup; FCAW more forgiving but more passes.
Project type: Offshore monopile transition piece fabrication (12 transition pieces, 60-80 mm wall, S420ML steel)
Wuxi ABK equipment package: AGW/EGW vertical welder × 2 + HJK-1500 rotator + LH-80150 manipulator + tandem twin-wire SAW for circumferential
Welding process: Vertical longitudinal seams welded by EGW single-pass 22 kJ/mm heat input + tandem SAW for circumferential; weld time per 80 mm vertical seam reduced from 12 hours (multi-pass FCAW) to 1.5 hours (single-pass EGW)
Outcome: All 12 transition pieces passed DNV-OS-J101 + EN ISO 15614-1 qualification; project delivered on schedule; 6× weld time reduction translated to ~30% total fabrication cycle compression
AGW (Automatic Gas-shielded Welding) and EGW (Electrogas Welding) vertical welder systems are the specialized equipment for single-pass vertical-up welding of heavy plate joints — wind tower section longitudinal seams, LNG storage tank sidewall, offshore monopile transition pieces, and any heavy plate vertical joint where single-pass deposition replaces multi-pass manual welding. AGW covers 12-40 mm with CO₂ shielding; EGW covers 20-80 mm with self-shielded FCAW or gas-shielded, with deposition rates 15-25 kg/hr (5-10× SMAW). The 5-subsystem architecture (water-cooled copper shoe + ceramic backing + wire feed/oscillation + vertical travel carriage + CV power source) enables continuous vertical-up welding. The 5-step decision framework guides AGW vs EGW vs multi-pass FCAW selection. Wuxi ABK Machinery manufactures AGW/EGW vertical welder systems for wind tower fabricators, LNG storage tank integrators, shipbuilding shops, and heavy plate structural steel fabricators — supported by CE Marking, optional SGS factory inspection, and 12/24-month warranty with direct manufacturer engineer travel for FAT/SAT and operator training.
For project-specific AGW/EGW sizing and configuration support — based on wall thickness range, base material specification, toughness requirements, production volume, and joint geometry — Wuxi ABK can provide a complete vertical welding line proposal including AGW/EGW sizing, integrated rotator/manipulator pairing for non-vertical seams, and FAT/SAT protocol.
Contact: jan@weldc.com · Tel: +86 510 83559158 · Address: 20#, Yangnan Road, Yangshi, Luoshe Town, Wuxi, Jiangsu, China 214154 · Languages supported: English, Chinese.
Last updated: 2026-06-16.
