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 pipe is made by rolling low-carbon carbon structural steel or low-alloy structural steel strip into a tube blank at a certain spiral angle (called forming angle), and then welding the tube seam together. It can be made with a narrower strip Steel produces large diameter steel pipes. Its