Cold drawn seamless tubing raw materials with different chemical compositions have different fracture characteristics. The fracture characteristics can be investigated with the naked eye, and the raw materials of cold drawn seamless tubing can be generally identified. This method is called fracture identification method.

Many users of stainless steel welded pipes are very curious about how to deal with the waste in the production process of stainless steel welded pipes. In fact, stainless steel welded pipes are prone to produce a lot of waste in the production process, which are mainly divided into stainless steel dust waste and solid waste.

Fluid seamless pipe means is a kind of steel pipe with hollow section and no weld from beginning to end; a large number of steel pipes are used for conveying fluids, such as pipelines for conveying oil, natural gas, gas, water and certain solid materials.

When grinding and polishing the surface weld of the embedded section of the 16mn thick-walled welded pipe, the welding misalignment of the pipe end is not sharpened or the sharpening is uneven. , When the 16mn thick-walled welded pipe is piled up outdoors for a long time, the metal material on the welded surface will be eroded first, which will cause the 16mn thick-walled welded pipe to be warped.

Metal surface treatment technology and thermal spraying technology are after surface preparatory treatment, according to seamless pipe surface coating, surface modification materials or a variety of metal surface treatment technical composite solutions, change the surface layer of seamless pipe and non-metallic material surface layer. Shape, organic chemical composition and tissue structure and geostress profile for automated control of the necessary surface properties.

Common problems during pre-welding of lsaw steel pipe mainly include wrong side, welding on the back and burn-through, porosity, poor weld formation and splash.