Non-destructive testing of carbon steel piping,Technology

Non-destructive testing of carbon steel pipe refers to check the internal or surface defects of steel pipe, or steel pipe determination of certain physical quantities, performance, organizational status of the detection technology in the no damage measured material circumstances.

Analysis of conventional non-destructive testing
Ultrasonic testing
Ultrasonic testing for steel quality inspection is including defect detection for the purpose of ultrasonic testing and to measure the relevant dimensions for the purpose of ultrasonic measurement. More extensive application of the former, the flaw of both automated and manual flaw; latter application measurement-based, and generally by hand.

Eddy current testing
Eddy current testing method is widely used in various fields of industry, non-destructive testing methods. It is based on the theory of electromagnetic induction, without any coupling agent can 100% fast automatic detection specimen. For seamless steel pipe shape the rules of a single specimen, is even more powerful tool for high-volume rapid detection. Therefore, it has become one of the necessary means of various types of steel quality inspection.

Magnetic flux leakage detection
The magnetic flux leakage detection is a non-destructive testing technology based on magnetic changes in the ferromagnetic material. Ferromagnetic material is magnetized, due to the presence of defects in the surface leakage magnetic field, magnetic flux leakage detection can be found defects in the material. Steel tube of magnetic flux leakage detection technology is divided into the magnetic particle inspection method and the magnetic field determination and French. The former is simple, but requires the naked eye to observe the magnetic marks, it is difficult to automate. Although the equipment complex, high cost and difficulty of the operation, but through the sensor to pick up the leakage magnetic field information, so it is easy to automate crack detection for automatic inspection of large quantities of steel. Therefore, under normal circumstances, such as no special instructions, the magnetic flux leakage detection of the steel pipe usually refers to the magnetic field determination.