The cleanliness and smoothness of the surface of the
seamless steel pipe is a requirement for the selection of a seamless steel pipe. The cleanliness of the surface of the seamless steel pipe has become a key point for the customer to choose. In recent years, it has been valued by many companies. Cracks on the surface of seamless steel pipes are a common phenomenon and a direct cause of low sales. So what are the factors?
First, the raw material factors: the poor quality of the tube blank will appear inside and outside the skin, crusting, cracks, etc.
Second, the temperature factor: the first important process of seamless steel pipe production is heating, poor heating (uneven, insufficient temperature, etc.) will cause internal skin, etc.
Third, the equipment factor: from the beginning of the furnace, each equipment component will affect the final quality of the pipe. For example, if the equipment parts are scratched, it will cause the outer skin and pits; if the punching machine is not smooth, the head of the tube blank will be bitten by water and bite into the head or the inside of the head.
Fourth, the process problem: the process problem is also quite complicated, there are adjustment problems, problems with equipment failure, and the quality of the pipe produced after the wear of the process components (head, guide, rolls, etc.). The problems caused are all-encompassing.
Therefore, there are dozens of possible reasons for the occurrence of a defect. If you do not see the physical object or are not at the production site, it is often difficult to say the specific reasons.
