Introduction
As a common non-destructive testing method, steel pipe magnetic flux leakage testing has formed a complete set of industry standards and specifications.
Details
China Steel's national inspection service scope expands:
The China Steel National Inspection Center has recently successfully registered with the housing and construction departments of Hunan Province, Yunnan Province, and Shandong Province, marking a further expansion of its service scope in the field of building construction testing and demonstrating market recognition of the institution's testing capabilities.
Internet joint layout:
Sinosteel CIQ is promoting the combination with Internet technology to provide more convenient services and information updates through online platforms, so that customers can quickly access the latest developments and technological developments.
Principle of steel pipe flaw detection:
For steel pipes made of ferromagnetic materials, magnetic particle testing is usually used; For non ferromagnetic materials, penetration testing is more commonly used. In addition, for welded joints with a tendency towards delayed cracking, testing after the weld has cooled can improve accuracy.
LSAW steel pipe non-destructive testing method:
It is recommended to use magnetic particle testing or penetration testing for non-destructive testing of the surface of LSAW (Longitudinal Submerged Arc Welded) steel pipes. These methods can effectively detect surface and near surface defects and are applicable to different types of steel pipe materials.
Diversified testing methods for seamless steel pipes:
The non-destructive testing of seamless steel pipes includes but is not limited to magnetic flux leakage testing, eddy current testing, ultrasonic testing, and radiographic testing. Each method has its specific application scenarios and technological advantages.
Standard specification for magnetic flux leakage testing of steel pipes:
As a common non-destructive testing method, magnetic flux leakage testing of steel pipes has formed a complete set of industry standards and specifications, covering equipment requirements, operating procedures, and other aspects to ensure the accuracy and reliability of testing results.
Challenges and solutions for non-destructive testing of large-diameter seamless steel pipes:
Due to the large diameter and thick wall thickness of large-diameter seamless steel pipes, traditional through type eddy current testing methods are difficult to meet the requirements. To this end, the industry is exploring new technologies and equipment, such as improved sink type ultrasonic testing devices, to achieve "blind spot free" inspection and solve the problem of space occupation.
Innovation of automatic flaw detection mechanical structure:
In the process of automated flaw detection, various new probe mechanical tracking modes have emerged to overcome the lift off effect and maintain a stable coupling layer. For example, using a distance measuring probe to adjust the probe position in real time to ensure a constant gap between the probe and the workpiece surface, thereby improving detection accuracy.
Intensifying market competition and emergence of new products:
With the increasingly fierce competition in the seamless steel pipe market, some alternative products have begun to emerge, such as heat tension reducing steel pipes. After special treatment, these products approach or even exceed traditional seamless steel pipes in certain performance aspects, and are expected to have more applications in the future.
