Analysis of conventional nondestructive testing methods and advantages

Date：2021-09-07 13:20:54 Views：1714

Nondestructive testing industry has a history of decades in China. With the development of social economy, nondestructive testing industry has been involved in all aspects of people's life. Some experts once said that NDT is a sunrise industry. There is a lot of room for development in this industry, especially in China. Product inspection has also changed from the era of human eyes to the era of machines. However, the smaller the product size, the higher the requirements for inspection equipment. Among them, nondestructive testing technology plays a vital role in the development of industrial field.

Domestic NDT equipment can be roughly divided into 26 categories, with more than 1000 specific product models and varieties. On the whole, it has covered most fields of the current application of domestic NDT technology, especially the equipment, equipment, accessories and consumables of conventional NDT, which has basically achieved low price and good quality and can meet the general testing needs, and many domestic NDT products have been exported to countries and regions outside the mainland. For example, portable ultrasonic flaw detector and analog ultrasonic flaw detector, digital ultrasonic thickness gauge, ultrasonic testing standard test block, ultrasonic probe, X-ray flaw detector, various radiographic testing auxiliary equipment, portable eddy current testing equipment, large eddy current testing automation system, etc.

1.Ultrasonic testing equipment: digital and analog universal portable ultrasonic flaw detector, large automatic ultrasonic flaw detection system (pipe, bar, plate, welded pipe, etc.), various special detection instruments and equipment (such as nodular cast iron spheroidization rate meter, bolt tightening force detector, sound velocimeter, ceramic insulator ultrasonic detector, etc.), various universal and special ultrasonic probes, ultrasonic thickness gauge, TOFD ultrasonic flaw detector, Phased array ultrasonic flaw detector, etc.

2.Magnetic particle testing equipment and materials: universal portable, mobile and bed magnetic particle flaw detector, various special magnetic particle testing equipment, large semi-automatic and automatic magnetic particle testing system, pulse magnetization equipment, demagnetizer, auxiliary instruments and consumables. The application of rotating magnetic field, compound magnetization, fluorescent magnetic particle testing and other methods has been more popular. The automatic crawling device for magnetic particle testing and the automatic fluorescent magnetic particle testing system recorded by CCD camera have been put on the market.

3.Penetrant testing equipment and materials: materials for dye penetration, fluorescent penetration and dye fluorescent penetration, portable equipment (such as spray tank type), large-scale automatic penetration assembly line system and various auxiliary equipment to meet the requirements of different sensitivity levels (ordinary industrial level to nuclear industrial level and special materials).

4.Radiographic testing equipment: X-ray γ Ray β X-ray, neutron ray, high-energy X-ray, X-ray tube, general portable, mobile and large fixed ray detection equipment, frequency conversion, constant frequency and constant potential X-ray machines, auxiliary equipment, various ray protection equipment and devices, and various radioisotope sources.

5.Eddy current testing equipment: universal portable digital eddy current flaw detector, pulse eddy current testing system, array eddy current testing system, large-scale automatic eddy current testing system, various special eddy current testing instruments and equipment, supporting eddy current transducers, coating thickness gauge, supporting auxiliary equipment, material sorter, conductivity meter, hardness sorter, metal detector, steel rope tension tester Wire rope detector, etc.

6.Magnetic flux leakage testing equipment: general, special and large automatic magnetic flux leakage detection system.

7.Endoscope: optical endoscope, optical fiber endoscope, video endoscope.

8.Optical measuring instrument: white illuminance meter, black illuminance meter, ultraviolet intensity meter, fluorescent brightness meter, etc.

9.Acoustic emission testing equipment: multi channel acoustic emission detection portable system and large system.

10.Leak detection equipment: electric spark leak detector, intelligent acoustic pulse rapid leak detector, pipeline leak detector and locator, organic inert fluorescent tracer leak detector, penetration leak detector, underground pipeline leak detector, underground cable leak detector, pipeline locator, gas pipeline leak detector, wet coating leak detector, etc.

11.Hardness measuring instrument: Leeb hardness tester, ultrasonic hardness tester.

12.Electromagnetic ultrasonic flaw detection equipment: electromagnetic ultrasonic testing system, automatic electromagnetic ultrasonic testing system, electromagnetic ultrasonic thickness gauge.

13.X-ray real-time imaging and industrial CT equipment: general and special equipment of image intensifier type and Dr type and resolution test card are adopted.

14.Laser detection equipment: portable laser electronic speckle meter, large-scale automatic tire nondestructive testing system using laser digital speckle interferometry technology, laser material thickness online measuring instrument, online laser caliper, laser digital detector, laser ultrasonic testing system, holographic photosensitive film and dry plate, etc.

15.Electric potential crack depth measuring instrument。

16.Infrared detection equipment: infrared thermometer, infrared endoscope, infrared thermal imager.

17. Cooperate with the application of various NDT methodsVarious series of standard test blocks, sensitivity test blocks and test pieces, general reference blocks and special reference blocksWait.

18. Cooperate with NDT applicationVarious special mechanical auxiliary devices and systems: mechanical device of semi-automatic and automatic flaw detection system, pipeline crawler for radiographic testing, test block engraving machine, fixed fixture and support of commercial X-ray machine, elevator, etc.

19. CooperationFluorescent magnetic particle, ultraviolet lamp for fluorescent penetrant testing, black light source。

20.Testing equipment for rock, concrete and pile foundation, concrete reinforcement tester, digital display rebound tester, reinforcement position tester, floor thickness tester, wave velocity logging tool, etc.

21.Microwave detection system, terahertz wave detection system。

22.Thermoelectric metal material sorter。

23.Magnetic stress gauge。

24.X-ray stress tester, X-ray diffractometer。

25.Metal magnetic memory technology: intelligent magnetic memory metal detector, stress concentration magnetic detector and crack magnetic indicator.

26. Others: such asSurface roughness meter, vibration meter, residual stress tester, ultrasonic concentration meter, ultrasonic flowmeter, ultrasonic liquid level meter, ceramic slurry moisture rapid testerWait.

Nowadays, nondestructive testing equipment has gradually changed from completely relying on import to independent research and development. The quality of domestic equipment is not inferior to that of import. Especially in some industries that require product accuracy, product quality is particularly important. NDT has a wide range of applications, including power system research institute, power construction company, light water reactor nuclear power station, wind power station, shipbuilding, natural gas pipeline, CNOOC offshore pipeline inspection, PetroChina, Yanchang oil pipeline inspection, pressure vessel inspection, aircraft maintenance, aircraft parts suppliers, military metal products suppliers, steel structure welding inspection 3D printing products, etc., these industries are closely related to nondestructive testing. The development of core technology promotes the development of nondestructive testing industry.