A studded tube is a type of enhanced heat transfer tube where metal studs or pins are welded onto the outer surface of a base tube. These studs increase the external surface area, significantly improving heat transfer efficiency while maintaining excellent mechanical strength.

Studded tubes are especially suitable for high-temperature, high-fouling, and corrosive environments, where conventional finned tubes may clog or fail. The open stud structure allows dust and ash to pass through easily, reducing blockage and making cleaning simpler.