A Double Pipe Heat Exchanger consists of one pipe placed inside another, allowing two fluids to flow in either parallel (co-current) or opposite (counter-current) directions. Heat is transferred between the fluids through the pipe walls. This simple design is ideal for small-scale applications and systems requiring high-pressure or high-temperature operations. https://www.heatexchanger.co.in/Heat-Exchanger/Double-Pipe-Heat-Exchanger/