How to carry on the high precision inspection to the tube end wall thickness

　　After the steel tube is finished, there will be defects such as uneven wall thickness at both ends of the tube. Therefore, each steel tube must be cut off at both ends. Since the length of the tube end where each tube has defects is not equal, it is difficult to determine the specific cut length at the time of excision. Therefore, it is necessary to measure the wall thickness of the device.

　　The specific requirements for testing are as follows:

　　1. Continuous detection, while detecting the edge feed. Each steel pipe takes no more than 30 seconds;

　　2. The length of the test steel pipe is not less than 500mm;

　　3. After detecting the qualified position, the test stops, and the obvious mark is made on the outer surface of the steel pipe;

　　4. The quality of the cut steel pipe is within the tolerance of the national standard of the steel pipe, and the precision is 0.02mm;

　　5. Separate marking for the presence of local high points;

　　6. For the alarm of the steel pipe that exceeds the set range, the on-site personnel decide whether to release it.

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