Seamless steel pipe has a wide range of applications and is generally used for a long time after construction. The quality of seamless pipes will affect the price and service life, so it is very important to do a good quality comparison. 

So what are the factors that affect the quality of seamless steel pipe? Here we will introduce it in detail.

Step 1: Temperature

Temperature is the main factor affecting the quality of American standard seamless steel pipe. Firstly, the uniformity of the heating temperature of the billet directly affects the uniformity of the wall thickness and the quality of the inner surface of the perforated capillary tube and then affects the quality of the wall thickness of the product. Secondly, the temperature and uniformity (especially the final rolling temperature) of the steel pipe during rolling are related to the mechanical properties and dimensional accuracy such as the outer diameter and surface quality of the product delivered in a hot rolling state. In particular, when the billet or tube billet overheats or even overburns, it will cause waste products. Therefore, in the production process of hot-rolled seamless pipe, it is necessary to do a good job of heating and controlling the deformation temperature strictly according to the technological requirements.

2. Process adjustment

Process adjustment and working quality mainly affect the geometry and appearance quality of steel pipe.

For example, the adjustment of the perforator and the tube rolling machine affects the precision of the wall thickness of the product, and the adjustment of the caliper is related to the precision and straightness of the outer diameter of the product. Moreover, the process adjustment also affects whether the rolling process can proceed normally.

3. Tool quality

The quality and stability of tools are directly related to the realization of effective control of dimensional accuracy, surface quality, and tool consumption. The quality of mandrel surface treatment (chrome plating) affects the inner surface of American standard seamless steel pipe and affects the consumption and production cost of the mandrel.

4. Process cooling and lubrication

The cooling quality of the perforated head and roll affects not only its life but also the quality control of the finished product. The cooling and lubrication quality of the mandrel firstly affects the inner surface quality, wall thickness precision, and mandrel consumption of the seamless steel pipe. At the same time will also affect the rolling load.

5. Removal and control of debris on the rolled surface

This refers to the timely and effective removal of the oxide sheet on the inside and outside surface of the tube and pipe before rolling deformation and the control of reoxidation. The inner and outer surface quality can be improved effectively by nitrogen-blowing and borax spraying and high-pressure water descaling at the rolling pipe and the diameter inlet.

Professional seamless steel pipe manufacturer - Shenlong

Cangzhou Shenlong Pipe is a professional manufacturer of seamless steel pipe, with more than 20 years of production experience. Its products are widely used in petrochemical, steel structure, and other projects. It is a reliable and qualified supplier of Petrochina and BP oil.

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