Shell Assembly

Shell & Tube Heat Exchangers

The tubesheet is a critical component in a shell and tube heat exchanger. It's a solid plate, typically circular in shape, with holes drilled to match the exact layout of the tubes. The tubes are inserted through these holes, and they are either welded, expanded, or both to the tubesheet, creating a secure and leak-proof connection. The tubesheet serves as a barrier between the shell-side and tube-side fluids, preventing them from mixing. Depending on the design of the heat exchanger, one or both tubesheets may be fixed to the shell, or one may be allowed to 'float' to accommodate thermal expansion. The material of the tubesheet must be compatible with both the shell and tube materials and the operating conditions of the heat exchanger. Common materials include carbon steel, stainless steel, and other alloys. The thickness of the tubesheet is also important as it needs to withstand the pressure of the fluids and the mechanical stress during operation and maintenance.