Single-coil aluminum tubes are made with a single layer of aluminum wound into a cylindrical shape, offering simplicity and ease of manufacturing. They are typically used in applications requiring basic heat exchange or formwork. In contrast, multi-coil aluminum tubes consist of multiple layers of aluminum wound together, which can provide greater strength and durability. They are often utilized in more demanding applications where higher pressure resistance and thermal efficiency are required, such as in high-performance heat exchangers or industrial processes. The multi-coil design also allows for better heat distribution and can handle more stress without deformation.