End caps or heads are hemispherical or elliptical components that seal the ends of cylindrical pressure vessels, containing internal pressure and providing structural integrity.
End caps, also known as heads, are critical pressure-retaining components that form the closure at both ends of a cylindrical pressure vessel body. They are designed to withstand internal pressure, external loads, and thermal stresses while maintaining a leak-proof seal. Common geometries include hemispherical, elliptical (dished), torispherical, and flat heads, each offering different strength-to-weight ratios and pressure distribution characteristics. These components are precisely manufactured to match the vessel's diameter and wall thickness, often featuring flanged edges for bolted connections or welded joints for permanent assembly.
该组件会出现在以下整机或工业产品中。
诱因 → 失效模式 → 工程缓解
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Hemispherical heads have uniform stress distribution and are strongest for high-pressure applications but are more expensive to manufacture. Elliptical heads (2:1 ratio) provide good strength with easier fabrication and are common for moderate pressures.
They are typically welded using full-penetration welds (e.g., butt welds) for permanent seals or bolted with flanges and gaskets for removable access, following ASME Section VIII welding procedures.
Stainless steel (316L), nickel alloys (Inconel), or clad materials with corrosion-resistant linings are used, selected based on fluid compatibility and temperature.
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