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The head refers to the element used to close the end of the container to isolate the internal and external media, also known as the end cap.The head of a cylindrical container typically consists of a rotating shell, which can be categorized based on the shape of its surface as either convex, conical, flat or combined. A convex head is one whose outer surface protrudes outwardly and may take the form of hemispherical, elliptical or dish-shaped heads without folds. Some gas cylinders employ a combination bottom head with an inward-facing convexity that not only ensures strength but also meets safety requirements.

The head refers to the element used to close the end of the container to isolate the internal and external media, also known as the end cap.The head of a cylindrical container typically consists of a rotating shell, which can be categorized based on the shape of its surface as either convex, conical, flat or combined. A convex head is one whose outer surface protrudes outwardly and may take the form of hemispherical, elliptical or dish-shaped heads without folds. Some gas cylinders employ a combination bottom head with an inward-facing convexity that not only ensures strength but also meets safety requirements.