Vacuum box Inspection

Vacuum box testing is a non-destructive examination used when trying to locate weld seam leaks. A vacuum box and a compressor create a high- or low-pressure vacuum while a detergent solution is applied to the test area. The detergent bubbles, making leaks visible within the created pressure envelope. Clev Dynamic utilizes systems compliant with ASTM E515. All inspections are conducted within the parameters of ASME Section V Article 10, Appendix II or to client specifications. The aim of the vacuum box technique of bubble leak test 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. This testing helps companies save costs associated with lost time and production incurred from repairing leaks after startup.