The weld seam of spiral welded steel pipe is evenly distributed on the circumference of the spiral pipe, and the spiral welded steel pipe has high dimensional accuracy and strong strength. Under the same specifications of wall thickness, spiral welded steel pipes can withstand significant pressure. Moreover, due to the continuous bending process, the size of the spiral tube is not limited and the length can be freely determined. After welding is completed, perform radiographic inspection on the cross joints of spiral welded steel pipes and spiral welded pipes.