Today Shenlong Pipe introduces different types of pipe inspection technologies, including UT, X-Ray and magnetic leakage, as well as a comparison of pipe inspection technologies.

Pipeline inspection technology-UT

The instrument that uses ultrasonic inspection methods for detection is called ultrasonic flaw detector. The principle is: the propagation of ultrasonic waves in the material for detection, the acoustic properties of the material and the internal organization of the changes in the propagation of ultrasonic technology has a certain impact, through the ultrasonic probe to understand the degree and condition of material properties and structural changes is called ultrasonic flaw detection. Ultrasonic detection methods usually have penetration method, pulse reflection method, tandem method. Penetrating ability, detection depth of up to several meters.

Pipeline inspection technology-X-ray

And X-rays can penetrate materials that are generally impermeable to visible light. The strength of its penetrating ability, with the wavelength of X-rays, the density and thickness of the material being penetrated. the lower the wavelength of X-rays, the greater the density, the thinner the thickness, the easier X-rays penetrate. In practice, the penetration power of an X-ray (i.e., the mass of the X-ray) is determined by the magnitude of the voltage V in the tube (kV), while the product of the unit time (mA) and the current time through the X-ray represents the amount of the X-ray. The maximum thickness that can be measured is related to the X-ray intensity and is typically less than 0.3 m thick for metals.

Pipeline Inspection Technology - Leakage Magnetism

The working principle of leaky pipe corrosion detection equipment is to use the magnet carried by itself to produce a longitudinal magnetic circuit field on the full circumference of the pipe wall. If there are no defects in the pipe wall, the magnetic lines of force are confined within the pipe wall and uniformly distributed. If there is a defect in the inner or outer wall of the tube, the magnetic flux path becomes narrower, the magnetic lines of force are deformed, and some of the magnetic lines of force will penetrate outside the tube wall to produce the so-called leakage magnetic field. The leakage magnetic field is detected by the probe located between the two poles, close to the tube wall, and generate the corresponding induction signal, these signals after filtering, amplification, analog-to-digital conversion and other processing is recorded into the detector's mass memory, after the completion of the detection, in the special software to play back the data processing, identification and judgment.

Comparison of pipeline inspection techniques

Compared with X-ray flaw detection, ultrasonic flaw detection has some advantages: high flaw detection sensitivity, short cycle time, low cost, flexibility and convenience, high efficiency, and harmless to human body.

Compared with X-ray flaw detection, ultrasonic flaw detection has some shortcomings: the working surface is smooth, it requires inspection by experienced personnel to determine the type of defect, and the defect is not intuitive.

Cangzhou Shenlong Pipe is the world's premier supplier of carbon steel pipe, stainless steel pipe, seamless pipe, welded pipe, galvanized pipe, casing and steel fittings. All products are inspected by UT or X-ray.

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