Magnetic Welding Carriage & Crawler Welding Robot | Pipe & Tank Circumferential Welding

Magnetic crawler welding carriage on pipe

Sticks to Steel. Goes Anywhere.

Magnetic wheels grip carbon steel directly — welds pipes and shells from Ø108 mm to Ø700 mm on plate from 3 mm. Add the optional track for larger diameters and the anti-drift fixture to keep the torch locked on the seam.

Carbon steel Ø108–700 mm, plate ≥ 3 mm
Optional track extends the working range to larger diameters
Optional universal castor wheels for fast repositioning
Welds inner and outer fillet seams on tanks and shells
Straight-swing and angle-swing versions; anti-drift fixture available

Request CX Series Quote

Watch It Work

Application Videos

Magnetic carriage welding a pipe / shell seam

Specifications

CX Series Technical Data

Item	Specification
Carriage model	CX-III-Q1/Z (straight swing) · CX-III-Q1/J (angle swing)
Drive mode	Magnetic-wheel drive
Welding speed	0–650 mm/min (digital display)
Minimum suction thickness	3 mm (magnetically permeable material)
Welding diameter range (outer)	Ø108 mm and above
Minimum welding inner diameter	Ø700 mm
Carriage dimensions (L×W×H)	335 × 305 × 312 mm
Carriage weight	12.8 kg
Swing mode	Straight swing / angle swing
Swing width	0–32 mm (digital, simulated value)
Swing angle	30° (angle-swing version)
Swing speed	0–2700 mm/min
Dwell time left / right	0–4 s each
Centre offset compensation	±5 mm
Torch adjustment — vertical	65 mm (vertical slide)
Torch adjustment — horizontal	125 mm (main unit left/right rail)
Oscillator rotation	±60°
Torch nozzle travel angle	±25°
Magnet wheel tolerance	Permanent high-temperature magnets hold full strength below 580 °C; no wear, no track required
Controller	Gen-III split controller with 7-pin aviation socket for the optional intermittent welding module
Standard configuration	Carriage ×1 · Gen-III controller ×1 · Gen-III power unit ×1 · Gen-III straight/angle oscillator · Universal horizontal and vertical adjustment · Universal torch fixture ×1 · Torch cable support ×1 · Tool kit ×1 · Documents ×1 · Packaging ×1

Options & Customization

Magnetic track for larger diameters and extended travel
Anti-drift fixture to keep the torch locked on the seam line
Universal castor wheels for fast repositioning between joints
Intermittent welding module, battery pack, external auxiliary devices

Download the Datasheet

Full technical data for this machine in a printable English PDF — specifications, configuration and options. Hand it to your engineering team.

Download Datasheet (PDF)

Values are taken from the product operation manual. Custom configurations — track length, torch fixture, dual-torch setup, expanding-head size — are quoted to your workpiece.

Naming guide: CX-III-Q1/Z-W = magnetic straight swing · CX-III-Q1/J-W = magnetic angle swing · optional magnetic track and anti-drift fixture available for both.

FAQ

Questions Engineers Ask About This Machine

What pipe diameter can the CX magnetic crawler weld?

Outer diameter from Ø108 mm upward, and inner-shell welding from Ø700 mm. Larger diameters are covered by adding the optional magnetic track. Minimum suction thickness is 3 mm of magnetically permeable material — the wheels need bare steel, with no insulation or coating between magnet and workpiece.

How does it stay on the seam line around a pipe?

The magnetic wheels grip the curved surface directly, so the carriage walks the circumference without a jig or clamp. For long seams where drift would matter, add the anti-drift fixture, which keeps the torch locked on the seam line for the full circle. Penetration then stays consistent instead of changing between flat, vertical and overhead positions.

Do the magnets lose strength from welding heat?

No. The permanent high-temperature magnets hold full strength below 580 °C, so normal welding heat does not reduce adhesion. Because the wheels grip magnetically there are no wearing friction parts on the travel path, unlike a belt or friction-wheel drive.

Is this a trackless machine?

The standard configuration is trackless (the "W" in the model code), which is what makes positioning so quick on pipes and shells. The optional magnetic track is added when you need longer travel or larger diameters, and universal castor wheels can be fitted for fast repositioning between joints.

Why is the controller separate from the carriage?

The Gen-III controller is a split type with a connection cable, so you can stand where you can actually watch the arc on complex work such as inside a shell — instead of bending around the machine. It also carries a 7-pin aviation socket for the optional intermittent welding module.

Where It Works

Applications for the CX Series Magnetic Crawler

Machines are specified by weld type and workpiece, not by catalogue page. See how this series is used in real fabrication work:

Pipe & Pipeline WeldingCircumferential seams on pipes, elbows, flanges and spools. Pressure Vessel WeldingVessel shells, nozzles and multi-pass butt welds. Heat Exchanger WeldingTube-to-tubesheet joints, shell seams and baffle plate welding. Storage Tank WeldingShell long seams, vertical seams, circumferential seams and tank roofs.

Magnetic Crawler Welding Carriage — CX Series