A Double Pipe Heat Exchanger consists of one pipe placed inside another, allowing two fluids to flow in counterflow or parallel flow for heat transfer. Its simple design makes it easy to construct, operate, and maintain. Double pipe heat exchangers are commonly used in chemical, oil, and process industries for heating or cooling small fluid quantities. https://www.heatexchanger.co.in/Heat-Exchanger/Double-Pipe-Heat-Exchanger/