NDT is the abbreviation of non-destructive testing, which is a widely used testing method in the steel pipe industry. Today, we will introduce the application of non-destructive testing in the steel pipe industry.
In the early days, the term "non-destructive testing" was widely used, and the literal meaning was limited to detecting defects that cannot be observed by the human eye without damaging the material or product. But in actual work, it is necessary not only to find the defects of steel pipes, but also to judge whether the steel pipe materials or steel pipes are suitable for certain conditions. Therefore, "non-destructive testing" also plays the role of detection, and is gradually replaced by the term "non-destructive testing".
The term "non-destructive testing" is developed on the basis of terms such as "non-destructive testing" and "non-destructive inspection". With the development of non-destructive testing technology, new equipment, new technologies, and new methods are constantly being used, and the application scope of "non-destructive testing" has far exceeded the scope of detection and inspection. Therefore, "non-destructive testing" is currently a general term.
Non-destructive testing is a testing method that refers to the detection of whether there are defects in steel pipes and steel pipe metal materials, and if there are defects, the shape, size and development trend of the defects. Nondestructive testing uses the principle that the physical properties of steel pipes and steel pipe metal materials will change due to the presence of defects, and is carried out without damaging the metal materials and steel pipe products. People usually call nondestructive testing "nondestructive testing".
Importance of nondestructive testing
One of the main purposes of nondestructive testing is to conduct real-time process quality control of steel pipe raw materials, steel pipe semi-finished products, steel pipe finished products and steel pipe parts that are processed discontinuously such as multi-process production or continuously such as automated production lines. Nondestructive testing is particularly suitable for the control of steel pipe metallurgical quality and production process, such as monitoring defect conditions, microstructure state, coating thickness, etc. At the same time, the design and process departments can obtain feedback quality information through testing, so as to further improve the design and manufacturing process, and ultimately improve the quality of steel pipes, reduce the number of inferior steel pipes, and save manufacturing costs.
There are many advantages to using nondestructive testing technology in the steel pipe manufacturing process. Nondestructive testing technology can help discover various defects in raw materials and manufacturing processes, and carry out corresponding controls to prevent unqualified raw materials and semi-finished steel pipes from entering the next process, thereby avoiding waste of working hours, manpower, raw materials and energy, improving design and processes, and reducing the number of inferior steel pipes.
In addition, non-destructive testing technology can also control the steel pipe material and steel pipe quality within the appropriate performance requirements according to the acceptance standards, avoiding the so-called "excess quality" caused by unlimited improvement of steel pipe quality. Non-destructive testing technology can be used to determine the location of defects, so that certain defective steel pipe materials or semi-finished steel pipe products can be fully utilized without affecting the design performance, which is conducive to improving the utilization rate of materials and obtaining good economic benefits.
Therefore, non-destructive testing technology plays an important role in reducing manufacturing costs, improving material utilization and production efficiency, and meeting the performance requirements and economic benefits of steel pipes.
