Vaccum Box

vacuum box is used for checking leaks on tank bottom surface.

vacuum box is used to check for any leaks or faults in the welding of bottom and annular plates of the tank. it is a container made of acrylic sheet with an inlet valve connecting to the vacuum pump. the vacuum pump attached creates a vacuum in the vacuum box, which shows bubbles on the soap water applied on the weld incase of any leaks or weld defects. it is one of the most adaptive method to test for any defects or leaks in the bottom and as efficient as radiography is for shell weld tests

ndt inspection by – vacuum box (bubble) test

1. vacuum box bubble test is one of the safest and reliable non-destructive test method.

2. the vacuum box bubble test can locate leaks in the test area that cannot be directly pressurized.

3. the test is performed by applying a detergent solution on the test area and creating a vacuum around the test surface by external mechanism e.g. vacuum box.

4. the detergent solution will bubble if there is any leakage through the test area.

5. your person should be trained and experienced in vacuum box bubble test method in accordance with asme v, appendix ii.

6. confirm to standard of measurement as per 1. api-650 (latest edition) 7.3.4 & 8.6 eleventh edition 2. asme sec-v