How to distinguish between smls pipe and ordinary steel pipe

Ordinary steel pipes, such as tap water pipes, are generally welded by bending the plate, and you can find a weld on it; the thicker diameter is generally a spiral weld.

SMLS pipe is generally the molten state of molten steel through the annular slit backlog and then after stretching and other processing technology molding, so there is no weld. In terms of performance, especially the pressure capacity than ordinary steel pipe has greatly improved, it is often used for high pressure equipment.

Such as piping connections for hydraulic equipment. The ordinary steel pipe weld part of its weak links, weld quality is also affecting its overall performance of the main factors. People living in the north have generally had a water pipe or heating pipe in the winter was frozen explosion experience, the explosion is generally the place where the weld. The pipe is not a smls pipe. Ordinary steel pipes, such as tap water pipes, are generally welded by bending the plate, and you can find a weld on it; the thicker diameter is generally a spiral weld.