A Hairpin Heat Exchanger (also known as a Double Pipe Heat Exchanger) is a compact and highly efficient device used to transfer heat between two fluids — typically one hot and one cold — without allowing them to mix. Its design features two concentric tubes bent into a “U” or hairpin shape, which allows for high thermal efficiency and easy maintenance even under high pressure and temp... https://www.unitedheatexchangers.com/heat-exchanger/hair-pin-heat-exchanger/