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Plate heat exchangers are common heat exchange devices in civil and industrial heat exchange systems. Its take over is an important component of the heat exchanger, and the installation requirements are also quite strict. Below, the editor briefly outlines the precautions for installing connections on plate heat exchangers: 1. The connections should be level with the inner surface of the flange ； 2. The inlet and outlet ports for hot and cold fluids in the pipes should correspond to those on the heat exchanger; for ease of maintenance, it is best to use short connectors when connecting the pipes to the heat exchanger ； 3. The take over should be arranged as much as possible radially or axially along the plate heat exchanger ； 4. When the temperature requirement is 300°C or higher, butt-welded flanges should be used ； 5. Temperature gauge interfaces, pressure gauge interfaces, and level gauge interfaces should be provided when necessary ； 6. For heat exchangers that cannot be vented or drained through connections (or interfaces), a vent should be installed at the highest point of the equipment and a drain at the lowest point, with a minimum nominal diameter of 20 mm ； 7. Plate heat exchangers can be equipped with overflow ports. When installing and operating plate heat exchangers, it is necessary to thoroughly understand the relevant installation and operation procedures as well as precautions, in order to ensure their normal and stable operation during use, and to minimize any damage to the heat exchanger caused by damaged components.