Ordinary steel pipes, such as tap pipes, are usually welded by bending plates on which you can find welds; the thicker diameter is usually spiral welds.


SMLS pipes are usually formed by molten steel backlogged through annular cracks and then stretched and other processing processes, so there are no welds. In terms of performance, especially pressure capacity, it is much higher than ordinary steel pipe, so it is often used in high-pressure equipment.


For example, pipeline connection of hydraulic equipment. The weld quality is also the main factor affecting the overall performance of ordinary steel pipe. People living in the North usually have the experience of a pipe or heating pipe being frozen and exploded in winter, usually where the explosion is welded. Pipes are not SMLS pipes. Ordinary steel pipes, such as tap pipes, are usually welded by bending plates on which you can find welds; the thicker diameter is usually spiral welds.