The production specifications and diameters of spiral steel pipes are 219mm and 3820mm, and the materials mainly include Q235B, No. 20 steel, Q355B, and pipeline steel. According to the quality inspection results of spiral steel pipes, they are usually divided into three categories: qualified products, repaired products, and scrap products. Qualified spiral steel pipes refer to spiral welded steel pipes whose appearance and internal quality meet relevant standards or delivery acceptance technical conditions;