The stainless steel U-tube is a type of U-shaped heat exchange tube, often used in U-tube heat exchangers. The advantages of a U-tube heat exchanger are as follows:

1. The tube bundle can float freely, making it suitable for applications with large temperature differences.
2. It only has one tube sheet and a limited number of flanges, resulting in a simple structure.
3. The U-tube heat exchanger operates stably.