To ensure optimal welding quality,it is essential to remove the galvanized layer at the weld joint first,You can use a hand grinder,sandpaper,or gas welding flame for cleaning,Failure to do so may lead to bubbles,sand holes,incomplete welding,as well as brittleness and reduced rigidity of the weld seam,For galvanized steel pipes with a diameter exceeding 100mm,flanges or sleeve-type special pipe fittings should be adopted for connection,The welding joint between the galvanized steel pipe and the flange must be galvanized for the second time to ensure corrosion resistance,
2026-01-30