Leak Detection

For detecting the leaking tube, the following procedure is followed

  • Discharge the liquid being cooled in the liquid chamber by the drain valve provided in the bottom and open up the chamber.
  • Fill the main body with fresh water and pressurize it by applying air pressure or hydraulic pressure from the top. The connection could be fitted, if not given
  • The leaking tube could then be identified when completely dried up
  • If the leakage happens from the expansion port of the tube in the tube plate, then it could be expanded slightly, which could arrest the leakage
  • The leaking tube could then be plugged from both sides by brass or plastic plugs provided by the manufacturer or could be made as well
  • The leaking tube could be replaced as well, depending on its condition
  • The leaking tube could be removed by making a bore inside the tube with a drill or a reamer of 0.5mm smaller than the outside diameter of the tube to a depth of the expansion
  • Then the tube drawing tool could be inserted and tapped slowly to knock it out from the other end
  • The new tube could be installed by inserting the tube expander into both sides of the tube and expanding it
  • The wall thickness of reduction= (wall thickness of tube before expansion – wall thickness of tube after expansion) / wall thickness of tube before expansion X100%
  • The above value should be between 5-8%

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