Header shell is the outer casing component of tube sheets/headers in heat exchangers and pressure vessels, providing structural integrity and containment.
A header shell is a cylindrical or rectangular structural component that encloses the tube sheet assembly in heat exchangers, boilers, condensers, and pressure vessels. It serves as the primary pressure boundary, containing the fluid medium while providing support for internal components like tubes, baffles, and partitions. The shell is designed to withstand operational pressures, thermal stresses, and mechanical loads while maintaining leak-tight integrity.
诱因 → 失效模式 → 工程缓解
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Header shells are specifically designed for tube sheet/header assemblies in heat exchangers, featuring precise nozzle alignments and internal baffle attachments, while general pressure vessel shells have broader applications with simpler internal configurations.
Header shells undergo hydrostatic testing at 1.5x design pressure, radiographic weld examination, ultrasonic thickness testing, dimensional verification, and surface inspection per ASME and ISO standards.
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