Variety of solutions

Exemplary hairpin applications

When to use BROWN FINTUBE® hairpin heat exchangers A hairpin heat exchanger should be considered when one or more of the following conditions exist: The process results in a temperature cross. High-pressure tubeside application. A low-allowable pressure drop is required on one side. Cyclic service. High flowrate ratios between shellside and tubeside fluids. High terminal temperature differences (300°F/149°C or greater). When an augmentation device will enhance the heat transfer coefficient. When the exchanger is subject to thermal shock. When flow-induced vibration may be a problem. When heating or cooling vapors. When complete vaporization is required. When solids are present in the process stream. When the mechanical advantages of a hairpin are preferred.

Koch Heat Transfer maintenance support

Maintenance

Operation and maintenance manuals are available that address the disassembly and reassembly of specific designs. In general, the bundle of a hairpin exchanger is removed by first removing the tubeside bolting, flanges and split rings. The next step is to remove the shellside bolting, flanges and split rings. Finally, the return bonnet bolting is removed and the bonnet is placed to the side. The tube element can now be pulled from the back end of the shell by placing a sling around the U-bends. On larger multitubes, a plate is installed around the U-bend for proper sling placement. Assembly is performed by reversing the process and utilizing new gaskets.

Spare parts

Replacement parts for BROWN FINTUBE^® or BAS-TEX exchangers are readily available. One complete set of gaskets is recommended for one year’s operation.

Surveys

For facilities with numerous hairpin exchangers, Koch Heat Transfer Company will perform a survey of the facility and establish design equivalents to current BROWN FINTUBE^® models. We will also evaluate ways to establish common designs for multiple services to allow commonality of spare parts and elements, resulting in reduced spare parts inventories and maintenance. Please contact a Koch Heat Transfer Company sales representative for more details.

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