1. Welding seam defects: Welding seam defects are serious and need to be compensated by manual mechanical grinding. The resulting grinding marks will cause the surface to be uneven and affect the appearance. Only pickling and passivating the welds also result in uneven surfaces.2. Scratches are diff

1. Causes of formation①Welding wire joint: Due to changes in the diameter and smoothness of the welding wire joint, the wire feeding speed of the welding wire joint will suddenly change when passing through the wire feed wheel, which will cause instantaneous changes in the welding voltage and meltin

When the spiral steel pipe is blocked, it will not only affect our use but also have a certain corrosive effect on some materials inside the spiral steel pipe. Therefore, if it is not cleared in time, it will have very bad effects over time.The first is to flush with water and use the pressure of wa

1) Thin-walled stainless steel pipes and fittings should not be in direct contact with cement, cement mortar and concrete. When the pipeline is concealed, anti-corrosion tape should be wrapped around the outer wall of the pipe or plastic-coated thin-walled stainless steel pipe should be used.2) When