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.

During cold drawing, only cold drawing rate or cold drawing stress control is called single control; during cold drawing, cold drawing rate and cold drawing stress are applied at the same time, which is called double control.

The quality of the inner hole finish of the cold drawn seamless tubing will bring many troubles to customers, which will not only affect the customer's yield, but also affect the quality of the finished product. So what is the finish of the inner hole of the cold drawn seamless tubing?