ondestructive testing is an essentiale and effective tool for industrial development.

 

Nondestructive testing is inspecing the structure, properties, status about the surface and internal of the specimen, and defect type, nature, quantity, shape, location, size, distribution and change, using the change of internal structural abnormalities or defects caused by heat, sound, light, electric and magnetic, by means of physical or chemical method, with the help of modern technology and equipment, where without damaging or affecting the tested object using performance, doing no harm the detected objects’ internal organization is the basis.

 

It includesradiographic testing (RT), ultrasonic testing (UT), magnetic particle testing (MT) and liquid penetrant testing (PT), and other methods.