Category Archives for Shell and Tube Exchangers

Shell and Tube Heat Exchanger Sizing

The required heat duty, film coefficients, conductivity, etc. for a shell and tube heat exchanger can be calculated using the procedures in Heat Transfer Theory, Approximate U-values are given in Table 2-8. In the basic heat transfer equation it is … Continue reading

15. September 2009 by and
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TEMA Glasses and Tube Materials

TEMA standards provide for two classes of shell and tube exchanger qualities. Class C is the less  stringent and is typically used in onshore applications and where the temperature is above ~20°F. Class R is normally used offshore and in … Continue reading

15. September 2009 by and
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Heat Exchanger Placement of Fluid

The question always comes up of which fluid to put in the tubes and which fluid to put in the shell. Consider placing a fluid through the tubes when: 1. Special alloy materials are required for corrosion control and high … Continue reading

14. September 2009 by and
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Heat Exchanger Selections

In selecting an exchanger, one must know the advantages and disadvantages of each type. The three basic types of shell-and-tube exchangers are fixed tube sheet, floating head, and U-tube. Table 3-1 summarizes the comparison between these three exchangers.

14. September 2009 by and
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Heat Exchangers Classification

In addition to the type description code there is also a shorthand that is used for classifying heat exchangers. The first element of the shorthand is the nominal diameter, which is the inside diameter of the shell in inches, rounded … Continue reading

14. September 2009 by and
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Heat Exchanger Types

There are many different arrangements of the shells, tubes and baffles in heat exchangers. Figure 3-6 is a list of TEMA standard classifications for heat exchangers, which helps to describe the various options. Theseare best understood in conjunction with the … Continue reading

14. September 2009 by and
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Heat Exchanger Tube Pitch

Tube holes cannot be drilled very close together, since this may structually weaken the tube sheet. The shortest distance between two adjacent tube holes is called the “clearance.” Tubes are laid out in either square or triangular patterns as shown … Continue reading

13. September 2009 by and
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Heat Exchanger Tubes

Heat-exchanger tubes should not be confused with steel pipe or other types of pipe that are extruded to steel pipe sizes. The outside diameter of heat-exchanger tubes is the actual outside diameter in inches within a very strict tolerance. Heat-exchanger … Continue reading

13. September 2009 by and
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Heat Exchanger Baffles

Shell-and-tube exchangers contain several types of baffles to help direct the flow of both tube-side and shell-side fluids. Pass partition baffles force the fluid to flow through several groups of parallel tubes. Each of these groups of tubes is called … Continue reading

13. September 2009 by and
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Shell and Tube Exchangers

Shell-and-tube heat exchangers are cylindrical in shape, consisting of a bundle of parallel tubes surrounded by an outer casing (shell). Both the tube bundle and the shell are designed as pressure containing elements in accordance with the pressure and temperature … Continue reading

13. September 2009 by and
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