P&ID diagrams, as previously said, are created using specified and standard shapes and symbols. Various symbols are required because this diagram covers many diagrams due to the wide diversity of businesses. These diagrams serve as a road map for the engineering system's design, which is later useful in identifying and solving problems. Actuators, equipment, flow elements, instrumentation, piping fittings, valves, and other instruments are among the most popular. A heat exchanger is a device that transmits heat from one surface, fluid, medium, or area to another. These devices are suitable for both cooling and heating applications. Boilers, condensers, and other heat-exchanging machines are among the symbols.