PAAWM-56Aa Orbital Automatic Pipeline Welding Machine (DN400-1400) | Qianshan, Shanghai, China

The PAAWM-56Aa is an orbital automatic welding machine for pipeline construction. It is designed for large and medium-diameter, thick-wall pipe (DN400 to DN1400, wall thickness 6 to 80mm) and does the hot pass, fill, and cap welding on circumferential joints.

A split-type orbital track is installed around the outside of the pipe and centred quickly by hand with screws. The welding head rides on the track, and the carriage is forced to follow it, so the gun stays in the right position around the whole circumference. The machine uses the FCAW/GMAW process with solid wire and mixed gas, welds downhill, and works in all positions. It uses an imported genuine MIG welding power supply which tolerates the voltage fluctuation of site generators, which is important for field work.

The operator inputs all the welding parameters before welding and can also adjust the machine in real time while it is running. The machine is used after the root pass has been welded, and Qianshan notes that pipe ends must be beveled and that the root is welded first with STT semiautomatic welding.

Why Choose an Orbital Pipeline Welder?

Pipeline fill and cap passes are long, repetitive welds that must be made in every position around the pipe. Doing them manually is slow and depends heavily on welder skill, while an orbital machine repeats the same conditions around every joint.

• Productivity. Qianshan quotes 250 to 350 inches per day of welding capacity.
• Weld quality. Qianshan states a welding qualification rate of over 96%.
• All-position welding. The gun follows the track, so the surface shaping stays consistent around the pipe.
• Field-ready. A split, external track, manual centring, and a power supply that tolerates generator voltage swings suit installation sites.
• Thick wall capability. Wall thicknesses up to 80mm are covered.

Machine Specifications

Capacity

• Applicable pipe diameter: DN400 to DN1400
• Applicable wall thickness: 6 to 80mm
• Materials: carbon steel, alloy steel, stainless steel, and low temperature (cryogenic) steel
• Welding process: FCAW/GMAW (solid wire with mixed gas), downhill welding

Welding head

• Welding head power: 120W
• Travel speed: 0 to 36m/h
• Oscillation range: 2.5 to 30mm
• Oscillation speed: 0 to 42mm/s
• Maximum offset: 70mm
• Dwell time: 0 to 2s
• Welding waveforms: triangular, trapezoidal, rectangular, and straight line
• Welding gun height: 0 to 80mm
• Welding gun angle: 0 to 360°
• Welding wire load: 5kg
• Weld head weight: 12kg

Performance (as stated by Qianshan)

• Welding capacity: 250 to 350 inches per day
• Welding qualification rate: over 96%

Track: split-type orbital track installed outside the pipe, with fast manual centring by screws
Power supply: imported genuine MIG welding power supply, tolerant of generator voltage fluctuation

Condition Available: New

Key Features

• Split-type external orbital track with fast manual centring
• All-position welding with the gun following the track
• Downhill FCAW/GMAW with solid wire and mixed gas
• Parameters set before welding and adjustable in real time
• Four selectable weave waveforms
• Imported MIG power supply that tolerates site generator fluctuations
• Lightweight 12kg welding head

Applications

• Hot pass, fill, and cap welding on long-distance pipeline circumferential welds
• Large and medium-diameter, thick-wall pipe welding on installation sites
• Pipeline construction

Who This Machine Is For

• Pipeline construction contractors
• Fabricators welding large-diameter, thick-wall pipe
• Companies looking to raise productivity and consistency on pipeline fill and cap passes

Frequently Asked Questions

What does this machine do?
It automatically welds the hot pass, fill, and cap on circumferential pipeline joints, using an orbital track around the pipe.

What pipe can it weld?
DN400 to DN1400 pipe with wall thicknesses from 6mm to 80mm, in carbon steel, alloy steel, stainless steel, and low temperature steel.

Does it weld the root pass?
No. Qianshan says the root is welded first using STT semiautomatic welding, and this machine is used after that. Pipe ends must be beveled.

How fast is it?
The travel speed is 0 to 36m/h, and Qianshan quotes a welding capacity of 250 to 350 inches per day.

Can it work on site?
Yes. It uses a split external track with manual centring and a power supply that tolerates generator voltage fluctuation.

What can the weave do?
Oscillation width is 2.5 to 30mm, speed 0 to 42mm/s, with a maximum offset of 70mm and dwell time up to 2s, in four selectable waveforms.

Is financing or staged payment available?
Yes. A deposit secures your order and begins production, with the remaining balance due only once your machine has been built, inspected, and is ready to ship.

Should I buy new or used?
This model is available new, built to order.