Shell-and-tube exchanger, fixed tubesheet (BEM)

ISO 10628-2 (groups 3-5, heat exchangers, furnaces, cooling towers) / PIP PIC001 / TEMA

Drawn as

A horizontal shell with a rounded bonnet at each end and straight tube lines running the full length between two tubesheets.

Meaning

Fixed-tubesheet exchanger (TEMA BEM/NEN): cheap and tight, but the tube bundle can't be pulled, so it is used for clean shell-side fluid. Becomes shell-and-tube-exchanger (temaType BEM).

Variants

Simplified legends draw just a rectangle with a zig-zag tube line
An expansion bellows on the shell means a large thermal difference