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Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,*,Slide Title,Body Text,Second Level,Third Level,Fourth Level,Fifth Level,a , .,.,?,?,*, *,a .,Most basic and common inspection method.,Tools include fiberscopes, borescopes, magnifying glasses and mirrors.,Robotic crawlers permit observation in hazardous or tight areas, such as air ducts, reactors, pipelines.,Portable video inspection unit with zoom allows inspection of large tanks and vessels, railroad tank cars, sewer lines.,A liquid dye is applied to the surface of the part and allowed time to seep into surface breaking defects.,.,A developer (powder) is applied to pull the trapped penetrant out the defect and spread it on the surface where it can be seen.,Visual inspection is the final step in the process. The penetrant used is often loaded with a fluorescent dye and the inspection is done under UV light to increase test sensitivity.,. a . . .,a ( ) . a .,High Electrical Potential,Electrons,-,+,X-ray Generator or Radioactive Source Creates Radiation,Exposure Recording Device,Radiation,Penetrate,the Sample,The part is placed between the radiation source and a piece of film. The part will stop some of the radiation. Thicker and more dense area will stop more of the radiation.,= more exposure,= less exposure,() .,Coils,magnetic field,Eddy,currents,Eddy currents,magnetic field,. a a .,a ., a .,f,0,2,4,6,8,10,(),(),(), , a , . . A (),() a . , a . A .,Probe,Signals produced by various amounts of corrosion thinning., .,.,Pipe with damage, .,.,.,.,.,A a .,a ., , .,., , 19, 1989,A 232.,232,17 . .,232,a a . , .,a .,578,000 ., a s .,1967 47 .,a 2 .,“” .,. , .,a .,.,. , a , .,For More Information on NDT,Chinese Society for Non-destructive Testing (ChSNDT),
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