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Double tube/double tubesheet heat exchangers are essential in applications where fluids cannot mix.
A double tube, or double wall, heat exchanger features a second outer tube along the length of the tubes so that, in the event of a leak, fluid has a designated path out to atmosphere, where it can be seen and addressed by maintenance personnel. Double tube heat exchangers, also known as concentric tube heat exchangers, require double tube sheets to continue the leak path, but a regular shell and tube heat exchanger can also be built with a double tube sheet to mitigate the effects of a potential tube seal leak.
Standard Xchange offers custom double wall and double tubesheet options on shell and tube heat exchangers. These specialized exchangers are most commonly used in the pharmaceutical, food and beverage industries, but are well suited for any situation where fluid cross contamination must be avoided.