LT-MZ1222 Automatic Column & Boom Welding Manipulator for Pipe Spool Welding, Circumferential Joint Welding on Large Diameter Pipes, Pipe Spools & Pipe Racks

The LT-MZ1222 is a heavy-duty automatic column and boom welding manipulator engineered for circumferential joint welding on large diameter pipes, pipe spools, and pipe rack components. When paired with welding turning rolls, it forms a complete automated workstation that delivers uniform, full-penetration girth welds with consistent arc stability and repeatable quality.

Designed for pipeline engineering, oil & gas, chemical, and power plant construction, this system supports submerged arc welding (SAW), MIG, MAG, and CO₂ gas shielded welding processes. It is compatible with carbon steel, stainless steel, and low alloy steel pipe materials, making it a versatile solution for pipe fabrication yards, pipeline prefabrication workshops, and industrial pipe rack producers.

The large diameter pipe or pipe spool is placed onto welding turning rolls, which rotate the workpiece at a continuously adjustable constant speed without slipping or vibration. The column-boom manipulator precisely adjusts the welding torch's height, horizontal distance, and aiming position to align with the pipe circumferential joint. During welding, the pipe rotates while the torch remains stationary, creating a continuous, uniform, full-circle circumferential weld.

For longitudinal seam welding, the horizontal boom travels at a constant preset speed to complete straight seam welding on cylinder plates and pipe segments.

1. Heavy-duty Vertical Column — Constructed from thick industrial steel plate with integral welding and stress relief treatment. High structural rigidity minimizes vibration during long-hour continuous welding and provides stable support for the boom and welding head.
2. High Rigidity Telescopic Boom — Closed rectangular beam structure with strong anti-torsion capacity. The horizontal travelling mechanism runs smoothly at constant feeding speed, ensuring a stable welding trajectory for pipe circumferential joints.
3. Gear-Rack Lifting Assembly — Motor-driven precision gear rack transmission. Lifting movement is smooth, jitter-free, and accurately positioned. Operators can adjust torch height according to different pipe diameters and multi-layer welding requirements.
4. Frequency Conversion Horizontal Travel Control — Stepless speed regulation allows flexible adjustment of boom travelling speed to match different pipe wall thicknesses, materials, and welding procedure specifications.
5. X/Y/Z Three-axis Torch Fine Adjustment Unit — Multi-direction micro-adjustment function helps operators calibrate torch position precisely for uneven weld gaps and multi-pass layered welding on heavy pipe joints.
6. PLC Touch Screen Control System — Industrial PLC and full-color touch HMI. Supports welding parameter setting, multiple recipe storage, and one-click recall. Users can save parameter groups for different pipe sizes and quickly switch production.
7. Industrial Drag Chain Cable Protection — All power cables, control lines, and gas hoses are routed inside heavy-duty drag chains, preventing pulling, abrasion, and aging during repeated mechanical movement, extending machine service life.
8. Multi-level Safety Protection System — Equipped with upper/lower lifting limit switches, front/rear travel limit sensors, emergency stop button, and mechanical anti-collision device, protecting operators and equipment in heavy workshop environments.

Automated mechanical positioning eliminates manual shaking and speed fluctuation. Weld bead appearance, fusion width, and penetration depth stay consistent around the pipe joint. Welds easily pass NDT inspection required for pipeline and pipe spool projects.

Designed for heavy pipe spool fabrication workflow. Combined with turning rolls, it supports stable rotation of large, heavy pipe sections and maintains precise torch position throughout circumferential welding.

One machine handles both ring joints on pipe spools and longitudinal straight seams, maximizing equipment utilization and reducing workshop investment cost.

Save welding recipes for common pipe sizes and materials. Switching between different pipe spool specifications takes minimal time, reducing machine downtime and improving workshop throughput.

Works seamlessly with mainstream welding power sources and turning roll models. It can be deployed as a standalone semi-automatic workstation or integrated into full pipe spool prefabrication lines.

Automated welding reduces reliance on highly skilled pipe welders. Stable welding quality greatly lowers defects, repair work, and grinding workload, cutting overall manufacturing expenses.

Stress-relieved heavy steel structure resists deformation and vibration. Low failure rate and simple routine maintenance make it suitable for long-time continuous operation in pipe fabrication yards.

This welding manipulator is widely used across heavy industrial sectors:

• Pipe spool prefabrication and pipeline engineering
• Oil, gas, and chemical plant pipe fabrication
• Power station and heating pipeline manufacturing
• Large diameter steel pipe production
• Pressure vessel, storage tank, and cylindrical shell fabrication

It stabilizes weld quality, increases daily output, shortens project lead time, and solves the shortage of experienced pipe welders. Built for heavy industrial conditions with reliable performance and long service life, it delivers excellent return on investment for pipe prefabrication factories.