Talking about welded steel pipe, the range would be wide from ERW steel pipe to spiral welded pipe and others tubes like LSAW steel pipe and so on. Today, we would discuss some differences according to the picture provided by manufacturer.

From the picture below, we can see the obvious difference for them is the shape of their final products. However, the main reference would focus on the alloy content of the coil. Due to it is often lower than similar grades of the steel plate, it would improve the spiral welded pipe's weld-ability. Due to the special performance of the spiral pipe, when it is blasting occurred, the weld suffered stress and co-stress is relatively small, blasting the mouth is generally not the origin of the spiral weld, so the higher security. Spiral weld near the defect with parallel spiral weld force is smaller, so the risk of expansion is not.