A hairpin type heat exchanger is a compact, double-pipe heat exchanger designed for high-pressure and high-temperature applications. It consists of concentric tubes bent into a U-shape (hairpin form), allowing efficient heat transfer between two fluids flowing in counter-current or co-current direction. Hairpin heat exchangers are easy to dismantle, clean, and maintain, making them suitable for services involving fouling fluids. Commonly used in oil & gas, chemical, and petrochemical industries, they offer flexible design options, modular construction, and reliable performance where space constraints and process efficiency are critical.