Fixed Tube Sheet Heat Exchanger

A Fixed Tube Sheet heat exchanger is the most common type heat exchanger in all Industries. Fixed Tube Sheet Heat Exchanger used in higher-pressure and Higher Temperature applications. Fixed tube Sheet heat exchangers are the one that are very much used in process chemical industries and refinery services, as there is absolutely no chance for intermixing fluids. This type heat exchanger is employed where even slightest intermixing fluids can not be tolerated. Fixed Tube Sheet Heat Exchanger has straight tubes that are secured at bothends to tubesheets welded to the shell. The construction may have removable channelcovers , bonnet-type channel covers tubesheets. The principal advantage the Fixed Tube Sheet Heat Exchanger construction is its low cost because its simple construction. In fact Fixed Tube Sheet Heat Exchanger is the least expensive construction type, as long as no expansion jointis required.

    Specifications :

  • The Fixed tube-sheet heat exchanger are that shell pass cannot be cleaned with the mechanical method and the maintenance is difficult.
  • The Fixed tube -sheet heat exchanger is applicable to all services where the temperature difference between the shell and tube is small.
  • In the event a large differential temperature between the tubes and the shell, thetubesheets will be unable to absorb the differential stress, making it necessary an expansion joint.
  • Applications :

  • The Tube sheets at both ends the fixed tube-sheet heat exchanger are connected and fixed with the shell by means the welding method.
  • Fixed tube-sheet type heat exchanger features simple and compact structure, and low manufacturing cost for the same diameter shell, the biggest number caladria is available in tubular heat exchangers is widely applied in engineering.
  • the temperature difference is slightly great but the pressure shell pass is not high with media in the shell pass not easy to scale
  • The shell pass can be cleaned with chemical method after the scaling is formed.
  • Advantages :

  • Advantages are that the tubes can be cleaned mechanically after removal thechannel cover or bonnet, leakage the shellside is minimized since thereare no joints.
  • A disadvantage this design is that since the bundle is to the shell and cannot beremoved, the outsides the tubes cannot be cleaned mechanically.
  • Its applicationis limited to clean services on the shellside. However, if a satisfactory chemical clean-ing program can be employed.
  • Construction may be selected for foulingservices on the shellside.
  • This takes away the advantage low cost to a significant extent.