How to perform non-destructive testing on glass-lined reactors

The non-destructive testing of glass-lined reactors refers to equipment testing under the premise of not damaging the performance and use of the equipment. To ensure the accuracy of the testing, the specific operation method can be carried out according to the following introduction.

1. Before non-destructive testing, the welded joints should pass the shape, size and appearance inspection, and the image on the negative film in the non-standard state of the surface shall not cover or interfere with the defective image. Therefore, the necessary finishing should be carried out on the detection part.

2. The Class A and Class B welded joints of the inner container and tank lid of the third category glass-lined pressure vessel with a design pressure greater than or equal to 1.6MPa, including butt welded joints with a nominal diameter greater than or equal to 250mm, shall be subject to 99% radiographic inspection Or recordable ultrasonic testing.

3. Class A and B welded joints of glass-lined pressure vessel equipment other than those specified above, including butt welded joints with a nominal diameter greater than or equal to 250mm, shall be subject to local radiographic testing or recordable ultrasonic testing. The length, proportion and parts that must be tested should be installed with the provisions of GB150 and drawings.

4. The length, proportion and required testing positions of glass-lined atmospheric pressure reactor and equipment X-ray or ultrasonic testing should be conducted in accordance with the regulations of JB/T4735.

5. The welded joints of the upper and lower connecting rings and the inner container of pressure vessels such as glass-lined reactors should be tested for leakage by kerosene or other appropriate inspection methods, and there should be no leakage. The welded joint of the half pipe and the inner container should also undergo 99% surface non-destructive inspection.

6. For the welded joints of equipment such as glass-lined reactors that have undergone partial non-destructive inspection, if an excessive defect is found at the inspection site, a supplementary local inspection of not less than 250mm shall be carried out at the extension of the two ends of the defect; if there is still not allowed For defects, the welded joint should be fully inspected.

The above is the non-destructive testing method of the glass-lined reactor. According to the method, the equipment can be tested without harming the internal organization of the tested equipment to ensure the normal use of the equipment.