VACUUM BOX TESTING (LT)
Vacuum Box Testing (LT) is a non-destructive examination used when trying to locate weld seam leaks. A vacuum box and compressor create a high or low pressure vacuum while a detergent solution is applied to the test.
Advantages & Disadvantages
Advantages
- Provides immediate indication visual of the location of any leaks present.
- It can detect small leaks within a given area.
Disadvantages
- Size and orientation of any leaks will have to be analyzed with a secondary NDT method.
- Surface temperature of the test material must be between 5 and 50 degrees Celsius.
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