Factors Affecting the Quality of ASTM Seamless Carbon Steel Pipes

The quality of ASTM seamless carbon steel pipe is affected by various factors throughout the manufacturing process. This article will look at some of the key factors that affect the quality of these pipes.

Temperature:

Temperature plays a pivotal role in determining the quality of seamless steel pipes adhering to the American standard. Firstly, the consistency of the heating temperature for the tube blank directly impacts the uniformity of wall thickness and the inner surface quality of the perforated capillary tube, consequently influencing the overall wall thickness quality of the end product. Secondly, the temperature and uniformity during the steel pipe rolling process, especially the final rolling temperature, are closely tied to the mechanical properties, dimensional accuracy, and surface quality of the products delivered in the hot-rolled state. Overheating of the steel billet or billet can lead to wastage. Therefore, strict adherence to process requirements in heating and temperature control is paramount during the production of hot-rolled seamless pipes.

Process adjustment:

Process adjustment is instrumental in determining the geometry and appearance quality of the steel pipe, directly impacting the overall work quality.

Tools quality:

Additionally, the quality and stability of tools are pivotal factors that directly influence the effective control of dimensional accuracy, surface quality, and tool consumption. The surface treatment quality of the spindle (chrome plating) not only affects the inner surface of the steel pipe but also plays a role in determining mandrel consumption and production costs.

Process cooling and lubrication:

Process cooling and lubrication are critical aspects influencing the life of the perforated plug roller and the quality control of the inner and outer surfaces of the final product. The cooling and lubrication quality of the mandrel significantly impacts the inner surface quality, wall thickness accuracy, and mandrel consumption of American standard seamless steel pipes. Furthermore, it affects the load during the rolling process.

Removal and control of surface impurities on rolling stock:

Efficient removal and control of surface impurities on rolling stock are vital. This involves timely and effective elimination of iron oxide scale on the internal and external surfaces of capillary tubes and waste tubes, along with controlling re-oxidation before rolling deformation. Treating the inner hole of the capillary tube with nitrogen blowing and borax sandblasting, as well as descaling with high-pressure water at the fixed (reduced) diameter inlet, can effectively enhance the quality of both internal and external surfaces.