Twin-Tungsten Hot-Wire TIG Overlay Welding Technology is a new, high-efficiency precision overlay welding process derived from conventional TIG overlay welding. It combines the dual advantages of a twin-tungsten composite arc and hot-wire preheating.
Specifically designed for the structural characteristics of seal faces (ring-type, male–female type, etc.) and passages (inner walls, transition sections) of pipe flanges, it achieves precise, efficient, and high-quality overlay welding.
This technology thoroughly solves the pain points of traditional overlay welding processes, such as low efficiency, high dilution rate, and poor weld layer formation. It provides reliable technical support for performance upgrading and safe operation of pipe flanges, and is widely used in the manufacturing and repair of flanges for various high-end equipment.

Its core value and industrial significance are mainly reflected in the following aspects:
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Improve flange performance and ensure equipment safety
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Break through traditional bottlenecks and enhance production efficiency
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Reduce operation and maintenance costs and realize green recycling
Twin-Tungsten Hot-Wire TIG Overlay Welding Technology for pipe flange seal faces and passages represents a perfect integration of high-efficiency precision overlay welding and flange-specific requirements.
With the advantages of dual-arc synergy, precise controllability, high efficiency and energy saving, this technology will further adapt to flanges of more complex specifications and more severe service conditions as automation and overlay welding processes continue to advance.
It will continuously optimize overlay welding efficiency and quality, providing higher-quality and more reliable overlay welding solutions for equipment upgrading in high-end fields such as petrochemical engineering, nuclear power, aerospace and others.