At present, China's head NDT testing system is relatively complete, and the technical methods are diversified. About testing, it should choose reasonable method. Before testing, fully understand the use of the head to be tested. According to its specific information and defect prediction, comprehensive consideration of economic and safety factors. Combining the application scope and technical advantages of various inspection methods, the most suitable inspection method is selected to improve the inspection efficiency and ensure the accuracy of the test results. And sometimes a non-destructive testing method can't judge the defect of the head very well, and it is necessary to apply multiple technical processes in order to make a better judgment.

　　As a kind of pressure equipment, when applying the NDT for comprehensive testing, the head should consider various factors and formulate a reasonable testing plan. For example, in the selection of the detection environment and time, the purpose of the head inspection should be based on the material properties, manufacturing process, external form, performance, and using environment of the head. Moreover, in the testing process, it is generally used in combination with destructive testing technology. Because in some inspection, non-destructive testing can’t replace destructive testing, such as pressure resistance test of LPG cylinder. In the testing scheme, workers also need to carry out burst testing. During the process, safety management should be strengthened to ensure the safety of the testing personnel.

　　The head is very important. There are many types, including coolers, evaporators, gas storage tanks, buffers, and oil-water separators. These containers are subject to external factors such as high temperature, the impact of high pressure and corrosive media is prone to shortened service life, accidents such as explosions, leaks, etc., which will affect the normal production activities of the enterprise, and critically endanger the life and property safety of workers. In order to use safely the pressure vessels, enterprises should do well in maintenance inspection and safety management in accordance with the "Pressure Vessel Safety Supervision Regulations" to ensure that production and operation activities. In this process, NDT testing are choosed usually. This method can perform defect detection without damaging the head, and propose targeted treatment measures to ensure that the head is stable when using.