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Seamless steel surface pits cause

Pitted seamless steel pipe is distributed on the surface of the pipe in different areas of local depression, the distribution of some cyclical, some irregular. Depression is caused by the oxidation of iron or other hard dirt in the drawing or straightening process into the seamless steel pipe surface, or the original exist in the steel pipe surface peeling. Measures to prevent the occurrence of pits are to carefully inspect the tube material and remove the defects such as warpage and keep the workplace, tools and lubricants clean, and prevent the scale and dirt from falling onto the surface of the seamless steel pipe.

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