In the process of photocatalytic reaction of large-diameter spiral steel tube, the specific surface area, surface morphology and crystal plane structure of the material have a very important influence on the efficiency of photocatalytic reaction, because the photocatalytic reaction mainly occurs on

Spiral steel pipes belong to welded pipes, which refer to seamless steel pipes with seams on the surface that are welded by electric welding after bending into a ring or a square with steel chains or thick steel plates.The ingredients selected for the welded pipe are thick steel plates or hot-rolled