How is hot rolled seamless steel pipe tested before leaving the factory?

After the seamless steel tube is completed, it is necessary to consider delivery, distribution, testing and other issues. Compared with the specific production links, these parts seem innocuous, but they play a vital role. It can be said that they cannot be ignore.

Weighing is a vital part of the delivery process. We need to consider both the actual weight and the theoretical weight of the seamless steel pipe. When delivering, we need to consider the size of the actual weight and the pipe material. In the state after annealing, it is necessary to consider the quenched and tempered, solid solution, and annealed states. At the same time, the surface roughness of the seamless steel pipe, burrs, etc. need to be tested. Generally speaking, hot rolled seamless The delivery status of the steel pipe is subject to strict inspection by the staff after heat treatment.

Most of the seamless steel pipes currently produced are hot-rolled technology. Because of the high temperature, the deformation resistance is relatively small. Generally, steel plates are used to complete the rectification rolling process. In this operation, steel plates must also be considered. If the specific thickness is relatively low, the problem of plate shape will not appear. It is mainly control. That is to say, in terms of temperature control, it is also a problem that must be considered. It can be said that the consideration of this part is also very important.

There are clear quality requirements for seamless steel pipes in the market, especially for different alloy elements. The harmful elements must be strictly controlled, and the danger of pipeline materials after production is also considered And defects, such as cracks, internal folds, external folds, rolling, delamination, scarring, dents, etc., these must also be controlled within the agreed range to avoid quality problems.