Quality inspection of LSAW steel pipe

　　The method for quality inspection of LSAW pipe, in which the physical method is the most commonly used inspection method, physical examination is a physical phenomenon to determine or check the application of the method.

　　Magnetic force

　　Magnetic flaw detection can only find the shortcomings of the appearance and appearance of the magnetic straight seam welded pipe. The disadvantages can only be quantitatively analyzed. The nature and depth of the flaw can only be estimated based on experience. Magnetic flaw detection is the use of magnetic field to discover the leakage of magnetic longitudinal weld seams. According to the method of measuring magnetic flux leakage, it can be divided into magnetic powder method, magnetic induction method and magnetic recording method, in which the magnetic powder method is the most widely used.

 　　Soak inspection

　　Penetration testing is the use of some liquid physical properties such as permeability to detect and display defects, including color detection and fluorescence detection, which can be used to observe the appearance defects of ferromagnetic and non-ferromagnetic materials.

　　Detection

　　Ray inspection is the use of defect detection in material properties and attenuated ray penetration material detection methods. According to different ray detection, it can be divided into X-ray inspection, γ-ray inspection, high-energy ray detection three. Due to its disadvantages, each type of ray detection is divided into ionization, luminescent screen, photographic and industrial television methods. Rui inspection is mainly used to check the internal weld longitudinal cracks, impermeability, porosity, slag and other defects.

　　Ultrasonic inspection

　　Ultrasound is used in homogeneous media such as metal because reflections occur at the same media interface and can be used for internal defect detection. Ultrasonic can detect the data of any weldment. Any part of the defect can find the direction of the defect more sensitively, but the nature, shape and size of the defect are more difficult to determine. Therefore, straight seam welded pipe ultrasonic flaw detection and coordination are often used.

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