Procedure 2-18 Design of Jacketed Vessels

External jackets are used to heat or cool the contents of a vessel. In effect, this turns the pressure vessel into a heat exchanger. Jacketing is an optimum means to accomplish this in terms of control, efficiency and product quality. The advantages are as follows  

All liquids can be used. Steam is ideal for heating. Water or Glycol are ideal for cooling. 

Circulation, temperature and velocity of the heating/ cooling media can be carefully controlled. 

Jackets may be fabricated from a much less expensive metal than the shell. 

Cleaning and maintenance can be minimized providing a clean media is utilized. 

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