How is the observation direction of the stage partition determined in the staged arrangement configuration of heat exchangers?
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GB/T151 6.3.2 provides illustrations of the split arrangement configuration: In the diagrams, is the arrangement of the partitions viewed by removing the flanges and looking at the tube box, or by cutting open the tube box shell (in the direction of the flanges)? ? Taking a four-pass system as an example, there is an example available online: As can be seen from the diagram, the schematic of the partition in the front tube box is shown after the flanges have been removed, with the flanges held in hand for observation – is that correct? ?
The openings on the tube sheet and the arrangement of the tube bundles can be angled; it is sufficient to remember that the inlet port for the tube side is located at the tube box corresponding to tube side 1, while the outlet port for the tube side is located at the tube box corresponding to the highest-numbered tube side (e.g., tube side 4 in the example of 4 tube sides). Additionally, the partition plates at the front and rear ends must be structurally compatible with each other and also match the partition slots provided on the respective tube sheets. For the example of the 4-pass configuration shown in the diagram, if the piping engineering team and the process system team consider that the diagonal piping at the positions of pass 1 and pass 4 makes it difficult to arrange the pipelines properly as well as to drain the materials during shutdown, and prefer that the inlet and outlet nozzles for these passes be located at the upper and lower positions of the tube banks, then one of the other two layout options among the three possible configurations for 4 passes can be chosen; in other words, the tube banks corresponding to pass 1 and pass 4 will be located at the upper and lower positions respectively. Furthermore, if the angular arrangement of the heat exchange tube bundle is involved, it is best to take this into consideration during the process calculations for the heat exchanger, as such an arrangement has a certain impact on the shell-side film heat transfer coefficient and the pressure drop calculations.
The process is arranged according to the requirements of the manufacturing process, and it doesn’t matter from which direction it is viewed
The process is arranged as needed, and it doesn’t matter which direction it’s viewed from
The last edit to this post was made by wanlirn on 2023-2-17 at 10:37. Regarding the diagram in table GB151, consider it as being viewed from in front of the tube sheet; the lines inside the circles represent the partition grooves of the tube sheet, and they have nothing to do with the tube box. In the example you provided, the horizontal lines can be placed on either the left or right side – in both cases it’s a 4-tube-pass configuration. It depends on the requirements of the actual process pipelines on site