Factors Affecting the Quality of Large-Diameter Anti-Corrosion Steel Pipes
Release time:
2021-12-02
Large-diameter anti-corrosion steel pipe is a widely used, property-controlled steel primarily employed for transporting fluid substances. It is also extensively utilized as a component in mechanical parts and is an exceptionally suitable control steel. Thanks to its outstanding performance, it plays an irreplaceable and vital role in social production and daily life. Therefore, for steel pipes, their quality directly determines their value and significance. So, what factors influence the quality of large-diameter anti-corrosion steel pipes?
Large-diameter anti-corrosion steel pipe It is a widely used property-controlled steel, primarily used for conveying fluid substances. At the same time, it is also extensively employed as mechanical components. As a highly suitable controlled steel, it plays an irreplaceable and vital role in social production and daily life due to its outstanding performance. Therefore, for steel pipes, their quality directly determines their value and viability. What factors influence the quality of large-diameter anti-corrosion steel pipes?
Cooling and lubrication in the large-diameter anti-corrosion steel pipe production process: The quality of cooling for the piercing mandrel and rolls not only affects their service life but also influences the quality control of both the inner and outer surfaces of the finished product. The quality of cooling and lubrication for the core rod primarily impacts the inner surface quality of the steel pipe, wall thickness accuracy, and core rod consumption; it also affects the load during the rolling process.
Cleaning and Controlling Surface Impurities on Large-Diameter Anti-Corrosion Steel Pipe Billets: This refers to the timely and effective removal of oxide scale from both the inner and outer surfaces of capillary tubes and scrap pipes, as well as controlling re-oxidation within the capillary tube’s inner bore. Techniques such as nitrogen purging and borax spraying are employed. Additionally, high-pressure water cleaning at the entry points of the pipe rolling and sizing (reducing-diameter) processes can effectively improve and enhance the quality of both the inner and outer surfaces.
Temperature is a key factor affecting the quality of steel tubes. First, the uniformity of the heating temperature of the tube billet directly influences the uniformity of the wall thickness and the quality of the inner surface of the pierced capillary, thereby impacting the overall wall-thickness quality of the final product. Second, during the rolling process, the temperature and its uniformity of the steel tube are critical to the mechanical properties of the product delivered in the hot-rolled state, as well as to dimensional accuracy—such as outer diameter—and surface quality. In particular, if the steel billet or tube billet overheats or even burns, it can result in defective products.
In short, many factors influence the quality of large-diameter anti-corrosion steel pipes, and these factors often interact in a complex manner. Therefore, it is essential to effectively control the major influencing factors mentioned above.
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