The LH column-and-boom manipulator is the welding head delivery system in any heavy fabrication shop running SAW, MIG/GMAW, or FCAW on cylindrical workpieces. While the welding rotator rotates the workpiece under the torch, the column-and-boom manipulator extends the welding head along the workpiece axis (for longitudinal seams) or holds it stationary at a specific position (for circumferential seams), reaching workpieces from compact pressure vessels (3 m boom) up to offshore wind XL monopiles (15 m boom). The choice of LH model — LH-3030, LH-3040, LH-8080, or LH-80150 — determines the fabricator's maximum workpiece envelope and welding throughput. The LH column-and-boom manipulator series is Wuxi ABK's flagship welding head delivery line covering the full capacity range from shop-scale to XL-offshore-scale fabrication. This guide is a technical deep dive on the LH series — capacity tiers, column-boom geometry, drive system, controls, project applications, and integration with the rest of the Wuxi ABK welding line.
Wuxi ABK Machinery Co., Ltd. is a Chinese manufacturer of welding automation equipment, founded 1999, exporting to more than 21 countries, with the LH column-and-boom manipulator series in active production across the full LH-3030 to LH-80150 range. 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.
A column-and-boom manipulator is a powered structure that carries a welding head (SAW / MIG / FCAW torch + wire feeder + optional flux delivery) to a precise position above a cylindrical or large flat workpiece. The "column" is a vertical mast providing vertical (Z-axis) travel. The "boom" is a horizontal arm that extends radially from the column providing horizontal (X-axis) travel. The welding head mounted at the boom tip can travel along the workpiece for longitudinal welding, or remain stationary for circumferential welding (with the rotator providing rotation). Critical performance parameters:
Boom reach (m): Maximum horizontal distance from column centerline to the welding head — determines the maximum workpiece radius / length the manipulator can serve.
Column height (m): Maximum vertical travel — determines the maximum workpiece diameter (for top-of-cylinder welding) or vertical reach in cubical workpieces.
Boom load capacity (kg): Maximum weight of welding head + supplies (torch + wire feeder + flux hopper + cables).
Travel speed range (mm/min): Continuously adjustable boom travel speed for SAW / MIG / FCAW welding speed window matching.
Positioning accuracy (mm/m): Repeatability of boom and column positioning — affects weld quality and WPS Essential Variable management.
The LH column-and-boom manipulator series covers four primary capacity tiers, each engineered for a distinct workpiece envelope:
| Model | Column height × Boom reach | Typical application |
|---|---|---|
| LH-3030 | 3 m × 3 m | Compact pressure vessel, small heat exchanger shell, pipe spool, small process tank |
| LH-3040 | 3 m × 4 m | Mid pressure vessel, medium heat exchanger shell, medium process tank, mid-length pipe spool |
| LH-8080 | 8 m × 8 m | Large pressure vessel, wind tower onshore section, mid LNG tank shell, large process vessel |
| LH-80150 | 8 m × 15 m | Offshore wind XL monopile, very large LNG tank shell, refinery heavy reactor, large floating wind substructure |
The capacity tier is named by "column height × boom reach" in decimeters: LH-3030 = 3 m × 3 m, LH-80150 = 8 m × 15 m. The boom is always the larger of the two dimensions in the heavy tiers because the boom must reach across the entire workpiece for longitudinal seam welding.
Founded: 1999 — 25+ years
Facility: 4,500 m² owned plant in Wuxi, Jiangsu, China
LH status: Flagship column-and-boom manipulator line in Wuxi ABK's portfolio (alongside HGZ standard rotator, HJK heavy-duty rotator, HBJ positioner, ZHGK fit-up rotator)
Customization capacity: 200+ customized welding lines per year, with LH manipulators often customized for non-standard workpiece geometry (extra-long boom / extra-tall column)
Certifications: CE Marking (Machinery Directive 2006/42/EC); SGS factory inspection available; 12/24-month warranty
Documentation pack: Operating manual, electrical schematics, MTR for load-bearing components, travel-speed and positioning-accuracy calibration certificates
Fixed column / fixed boom (default): Column mounted to shop floor; boom extension is fixed at order time. Most common configuration.
Telescoping boom: Boom extends/retracts via internal telescoping mechanism — useful when workpieces span varying lengths. Available across LH-3040 / 8080 / 80150 tiers.
Rotating column: Column rotates 360° on its base, allowing the boom to serve workpieces on multiple sides — useful in compact shops with limited floor space.
Track-mounted column (rail-traveling): Column travels along a floor-mounted rail, extending effective workspace by 10-30 m beyond fixed column footprint. Used for very long workpieces (offshore monopile, large LNG tank) or multi-station configurations.
Dual-boom (twin manipulator): Two booms operating in parallel from one column or two coordinated columns — used for twin-wire SAW or tandem SAW configurations on very high-throughput projects.
Boom travel drive: Servo motor with VFD on LH-3030/3040 (lighter loads); independent geared motor with rack-and-pinion on LH-8080/80150 (heavier loads + longer reach).
Column travel drive: Servo motor + ball screw (vertical) on LH-3030/3040; geared motor + chain drive on LH-8080/80150.
Travel speed range: 50-1500 mm/min continuously adjustable, matching SAW welding linear speed window. Higher speeds for MIG/FCAW.
Positioning accuracy: ±0.1 mm/m on LH-3030/3040 (default); ±0.05 mm/m available on request with linear encoder upgrade.
Digital readout: LCD digital display for boom position, column position, travel speed. Optional remote pendant display.
Pendant control: Wired pendant with all motion controls (forward / reverse / fast / slow / emergency stop); optional wireless pendant.
Welding head interface: Universal mounting plate accepts buyer-selected SAW / MIG / FCAW power source and torch (Lincoln Electric, ESAB, Miller, Fronius, Kemppi, OTC Daihen).
Compact pressure vessel / heat exchanger shell (LH-3030 / 3040): ASME Section VIII Div 1 vessels up to 4 m diameter / 6 m length; integrated with HGZ-30 / 50 rotator + HBJ-30 positioner + SAW power source.
Wind tower onshore section (LH-8080): Onshore wind tower can-to-can SAW welding; section diameter 3-5 m, length 20-30 m; integrated with HGZ-60 / HJK-500 rotator + tandem SAW.
LNG / LPG storage tank shell (LH-8080 for mid / LH-80150 for large): Tank shell longitudinal and circumferential seams; integrated with HJK-1000 / 2000 + AGW circumferential welder + ABK-DS hydraulic jacking.
Offshore wind XL / XXL monopile (LH-80150): 6-10 m diameter monopile, 150-300 ton sections, EXC4 European structural execution; integrated with HJK-1000 / 1500 / 2000 + tandem SAW + flange anti-deformation fixtures.
Refinery heavy vessel / hydrocracker reactor (LH-80150): 50+ m length, 800-1500 ton refinery reactor; integrated with HJK-1500 / 2000 + tandem SAW.
Heat exchanger production line (LH-3040 + TTW-300/500): Heat exchanger shell SAW welding (LH-3040) combined with TTW-300/500 tube-to-tubesheet welding.
Pipeline spool fabrication (LH-3030 / 3040): Mid-thickness pipeline spool prefabrication for oil & gas, LNG, petrochemical projects.
The LH manipulator is the welding head delivery backbone in most Wuxi ABK welding line configurations:
LH + HGZ rotator + SAW power source: Standard pressure vessel longitudinal and circumferential seam welding configuration.
LH + HJK heavy-duty rotator + tandem SAW: XL / XXL monopile + LNG tank + heavy reactor configuration.
LH + ZHGK fit-up rotator + SAW: Vessel can-to-can assembly + welding sequence.
LH + HBJ positioner + MIG/GMAW: Nozzle attachment + component fitting + smaller vessel configuration.
LH + ABOKE-MPW1600 membrane panel welding line: Boiler water wall fabrication configuration (LH for drum/header work + ABOKE-MPW1600 for membrane panel).
LH + AGW automatic girth welder: Very large tank circumferential welding configuration.
Step 1 — Workpiece envelope: Measure maximum workpiece diameter (drives column height) + maximum workpiece length (drives boom reach). Add 0.5-1 m safety margin. Select LH tier above that envelope.
Step 2 — Welding process integration: Confirm SAW / MIG / FCAW choice; confirm LH travel speed range covers the welding speed window of chosen process. Confirm boom load capacity covers welding head + wire feeder + flux hopper weight.
Step 3 — Boom geometry option: Fixed (default) / telescoping / rotating / track-mounted — based on shop layout and workpiece variability.
Step 4 — Drive configuration: Servo + VFD (default for LH-3030/3040) / geared motor + rack-and-pinion (default for LH-8080/80150). Linear encoder upgrade if WPS Essential Variable requires ±0.05 mm/m positioning accuracy.
Step 5 — Welding head integration: Confirm buyer-selected SAW / MIG / FCAW power source brand; Wuxi ABK adapts universal mounting plate to specific power source torch.
Step 6 — Documentation pack: Specify compliance regime (ASME / PED / GB 150 / AWS / EN 13445 / DNV-OS-J101 for offshore monopile); Wuxi ABK provides operating manual, electrical schematics, MTR, calibration certificates, CE Declaration of Conformity.
The LH column-and-boom manipulator supports fabricator compliance through documentation chain — operating manual, electrical schematics, MTR for load-bearing components (boom, column, frame), travel-speed and positioning-accuracy calibration certificates, CE Declaration of Conformity under Machinery Directive 2006/42/EC. The fabricator's certification (ASME U-stamp / S-stamp / R-stamp, PED Module H, GB 150, AWS D1.1, EN 1090 EXC3/4, DNV-OS-J101 / DNV-ST-0126 for offshore monopile, API 620 / EN 14620 for LNG tanks) is held by the fabricator's quality system, not by the welding equipment manufacturer.
Project type: European pressure vessel fabrication shop with mixed-product range
Wuxi ABK equipment package: LH-3040 column-and-boom manipulator + HGZ-60 welding rotator + HBJ-30 welding positioner + ZHGK-100 fit-up rotator, integrated with buyer-selected SAW power source
Compliance: Equipment documentation supporting fabricator's ASME Section VIII Div 1 + PED 2014/68/EU Module H quality system
Outcome: Multi-product fabrication line commissioned for serial vessel production; LH-3040 manipulator handles workpieces up to 4 m length × 3 m diameter at target welding speed.
The LH column-and-boom manipulator series is Wuxi ABK's flagship welding head delivery line — capacity tiers from LH-3030 (3 m × 3 m, compact shop) to LH-80150 (8 m × 15 m, XL offshore monopile / large LNG tank / heavy refinery reactor), covering the full workpiece envelope range from pressure vessel to XL fabrication. Column-and-boom geometry options span fixed / telescoping / rotating / track-mounted / dual-boom configurations. Drive systems include servo + VFD for lighter tiers and geared motor + rack-and-pinion for heavier tiers, with linear encoder upgrade for ±0.05 mm/m positioning accuracy. The LH integrates with the rest of the Wuxi ABK welding line — HGZ / HJK rotator + HBJ positioner + ZHGK fit-up + ABOKE-MPW1600 membrane panel + AGW circumferential welder + SAW / MIG / FCAW power source — for complete welding line configurations. Compliance supported through documentation chain with fabricator-held ASME / PED / GB 150 / AWS / EN 1090 / DNV certification.
For project-specific LH configuration — capacity tier (3030 / 3040 / 8080 / 80150), boom geometry option, drive system, welding head integration with buyer-selected power source — Wuxi ABK can provide the configuration proposal with engineering, documentation, and on-site installation and commissioning by Wuxi ABK engineers.
Related articles: HGZ welding rotator series deep dive (5-100 ton); HJK heavy-duty welding rotator series deep dive (500-2000 ton); ABOKE-MPW1600 membrane panel welding line deep dive; LH column-and-boom manipulator selection guide (LH-3030 / 3040 / 8080 / 80150 when each wins); complete pressure vessel workshop welding equipment guide.
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: 2026-06-10.
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