What is one common method used to seal a sectional heat exchanger?

A welded seam is a common method used to seal a sectional heat exchanger due to its ability to create a strong, durable, and leak-proof connection between sections. This method involves melting and fusing the edges of the sections together, which forms a solid bond that can withstand high temperatures and pressures typically encountered in heating and cooling applications. The welded seam provides structural integrity and ensures the efficient transfer of heat by minimizing the potential for leaks that could compromise the system's performance.

This option is preferred in many industrial applications as it can result in a more permanent and robust seal compared to other methods. While mechanical crimping can be effective in certain scenarios, it may not provide the same level of strength and resistance to thermal expansion as a welded seam. Adhesive sealing, although useful in some cases, often cannot match the durability and temperature resistance required for heat exchangers. Capsule covering is not a commonly recognized method for sealing heat exchangers and does not align with standard practices in this context. Thus, welded seams are widely used for ensuring the reliability and efficiency of sectional heat exchangers.