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  • Introduction to the Gas Laws
  • The Flow of Gases in Leaks
  • Helium Leak test on Heat Exchangers
    • Introduction
    • The integral leaktest with vacuum in the volume around the tubes and helium at atmospheric pressure in the volume of the tubes
    • The integral leaktest with helium pressure in the volume around the tubes and vacuum in the tubes
    • The integral leaktest with helium pressure in the volume around the tubes and atmospheric pressure in the tubes
    • The pressure decrease test
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The integral leaktest with vacuum in the volume around the tubes and helium at atmospheric pressure in the volume of the tubes

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The preparations prior to the test, the correct procedure during the test, the pumpdown and the response time are discussed, also problems and suitable gaskets and seals. Problem solving for negative test are described.

 
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