The shell-and-tube heat exchanger is named for its two major components round tubes mounted inside a cylindrical shell. The shell cylinder can be fabricated from rolled plate or from piping (up to 24 inch diameters). The tubes are thin-walled tubing produced specifically for use in heat exchangers. SHELL AND TUBE HEAT EXCHANGERS - thermopedia
Bonnet Similar to a channel with straight tubes but without a removable cover. These do not have divider walls and are at each end of the heat exchanger. Bonnet Assembly Manages the tube side liquid for circulation through the tubes. This can also hold the tube side inlet and outlet connections and/or pass ribs.
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