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Analysis of triple cathode welding technology: the ideal choice for efficient welding

Posted by： Hangao Time：7/14/2025 11:49:06 AM

In the stainless steel welded pipe industry, the efficiency and quality of the welding process directly determine production capacity and product performance. With increasing market demand for high-quality, high-strength welds, traditional single-cathode welding has gradually exposed issues such as slow speed, difficulty achieving penetration, and unstable weld formation. To address this bottleneck, triple-cathode welding technology emerged and has become the preferred choice for many high-end welded pipe production lines.

1. What is triple-cathode welding?

Triple-cathode welding is an upgraded version of traditional DC tungsten inert gas (TIG) welding. By employing three welding guns (cathodes) simultaneously targeting the weld area, multi-point heating and coordinated melting are achieved. Compared to single-cathode welding, this method offers significant advantages in heat input control, welding speed, and weld formation.

2. Functional Advantages of Triple-Cathode Welding Guns

1. Larger weld pool and higher weld penetration

The three welding guns provide a wider and more uniform heat source, enabling rapid weld pool formation and thorough melting of the base material. This enables deep weld penetration and minimal defects, even with thick-walled pipes or high-alloy stainless steel.

2. Significantly Improved Welding Speed

Multiple heating points release more energy, generally achieving welding speeds over 30% faster than single-cathode welding, effectively shortening production cycles and improving production efficiency.

3. Stable Arc, Enhanced Weld Beam Quality

The three-way arc distributes the current load, reducing arc drift and resulting in a more uniform and smooth weld. Common defects such as spatter and porosity are also reduced.

4. More Evenly Distributed Heat Affected Zone Reduces Deformation

Because of the wider and more evenly distributed heat, thermal stress on the workpiece during welding is more easily controlled, effectively reducing the risk of weld deformation and stress cracking.

III. Applicable Scenarios

Triple-cathode welding is particularly suitable for the following applications:

Thin-wall stainless steel welded pipe production (wall thickness 0.4-3.0mm)

Heat exchange tubes, industrial-grade pipes with high weld requirements

Pipe manufacturing plants requiring high production capacity and high yield

IV. Practical Application Cases

After deploying a triple-cathode welding system on a customer's production line in East China, the welding speed for thick-walled 304 stainless steel industrial pipes increased from 6 m/min to 10 m/min, and the yield rate increased from 92% to over 97%. The welds are smooth and free of voids, and blast tests meet customer requirements, with physical and chemical properties meeting standards. Customer feedback indicates a significant reduction in the rework rate, saving significant labor and time.

V. Conclusion

Hantech's triple-cathode welding technology not only complements traditional welding solutions but also represents a significant improvement in welding efficiency and quality. In today's pursuit of high quality and efficiency, it is becoming a standard feature of mainstream pipe manufacturers. If your production is experiencing issues like slow welding speeds, difficulty penetrating welds, and inconsistent quality, triple-cathode welding may be the breakthrough you need.

-end-

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