What material is used for sealing between the floating tube sheet and test ring in a heat exchanger?

The correct material used for sealing between the floating tube sheet and test ring in a heat exchanger is often Permatex. This product is designed to create a strong, reliable seal in various applications, including automotive and industrial uses. Permatex is particularly effective because it remains pliable after curing, allowing for movement between parts while still preventing leakage. Its ability to withstand temperature variations and different fluid types makes it suitable for environments typically encountered in heat exchangers.

In this context, using Permatex ensures that the thermal expansion and contraction of the materials involved do not compromise the integrity of the seal. Additionally, it provides good resistance to various chemicals and fluids, further enhancing its effectiveness in preventing leaks in the heat exchanger assembly.