Vacuum Box Testing
Vacuum Box testing is used to check for any leaks or fault in the welding of bottom & annular plates of the storage tank
The objective of the vacuum box technique of bubble leak testing is to locate leaks in a pressure boundary that cannot be directly pressurized. This is accomplished by applying a solution to a local area of the pressure boundary surface and creating a differential pressure across that local area of the boundary causing the formation of bubbles as leakage gas passes through the solution