Plasma arc welding is a fusion welding method that uses a high-energy density beam of plasma arc as the heat source.

Advantages:

① High welding arc stiffness, strong penetration capability using the principle of small hole effect welding. It uses high-purity inert argon gas (purity: 99.999%) for welding seam protection (protecting the center of the weld pool, trailing shield protection at the end of the pool, and backside protection of the weld seam). It can easily achieve single-side welding with double-sided forming of the weld seam, ensuring stable welding quality and no welding defects inside the weld seam.

② Concentrated welding arc energy, narrow heat-affected zone of the weld, no embrittlement in the heat-affected zone, high toughness and plasticity of the weld seam.

③ Low heat input, minimal welding deformation, effectively improving the corrosion resistance of the weld seam and prolonging the product’s service life.

④ The entire welding process adopts automatic arc length tracking, and the welding gun is equipped with a circulating water cooling system, which can achieve high-speed and long-term fully automated welding. The welding efficiency is much higher than that of ordinary welding methods.

⑤ After welding, the main weld seam undergoes 100% X-ray inspection, with a minimum quality grade not lower than AB, and the qualified level of the weld seam is Grade II. The first-pass RT (radiographic testing) inspection pass rate for the weld seam is 100%.