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Introduction:       When welding the stainless steel hexagonal steel pipe, the length of tungsten electrode protruding from the gas nozzle is 4-5mm, 2-3mm in the places with poor shielding property such as fillet welding, 5-6mm in the groove depth, and the distance between the nozzle and the working position is generally no more than 15mm.       The length of welding arc is 2-4mm for ordinary steel and 1-3mm for stainless steel.       In order to protect the welding pool well and facilitate the welding operation, the center line of tungsten electrode should be kept at 80-85 ° Angle, filler wire and hexagon
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