Shell Plate

A shell plate is a critical structural element in evaporator bodies and pressure vessels, typically fabricated from rolled metal sheets and welded to form cylindrical or spherical sections. It serves as the primary containment barrier for process fluids, withstanding internal pressure, thermal stresses, and corrosion while maintaining structural integrity. In evaporators, shell plates provide the housing for heat exchange tubes and separation chambers, with thickness and material selection determined by design pressure, temperature, fluid properties, and regulatory requirements.

Shell plates function as pressure-retaining components that distribute mechanical stresses uniformly through their curved geometry. They operate by containing internal pressure forces through hoop stress (circumferential) and longitudinal stress (axial) distribution, with the curved shape providing optimal strength-to-weight ratio. In evaporators, shell plates create the sealed environment where liquid evaporation occurs through heat transfer from internal tubes or coils, while preventing fluid leakage and maintaining pressure differentials.