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Bubble Leak Test

Bubble Leak Test

Principle

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 ( a ) creating a differential pressure across that local area of the boundary causing the formation of bubbles as leakage gas passes through the solution.

Application

  • LNG Carrier
  • Local area test after ammonia leak test
  • Ex) Injection point, Reference leak point, Damage repair test, Side opening tightness test

Equipment

  • Vacuum box with view window
  • Vacuum pump or Air ejector
  • Pressure gauge
  • Bubble solution
  • Light

Procedure

Please click here to see the Procedure

Evaluation

  • The area under test is acceptable when no continuous bubble formation is observed.
    When leakage is observed, the position of the leak shall be marked. The vacuum box shall then be vented and the leak is repaired as required. After repairs have been made, the repaired area or areas shall be retested.
Locating Vacuum Box & Creating vacuum
Observation leak indication

CONTACT
SGS SRS Korea Co., Ltd
16FL KT Busan IT Center,
830-29 Beomil-2dong, Dong-gu
Busan, Korea

t: 82-51-630-7074
f: 82-51-638-1711