Sealing head refers to the element used to close the end of the container to isolate the internal and external media, also known as end caps. The head of a cylindrical container is generally a revolving shell. According to the shape of the head surface, it can be divided into convex shape, cone shape, flat shape and combined shape.
Convex heads refer to heads whose outer surface is convex, such as hemispherical, elliptical, dish-shaped and spherical heads without folding edges. Some gas cylinders use a combined bottom head with a convex surface inward, which can not only ensure the strength, but also meet the needs of safe use.
The head is a part of the container, which is connected to the cylinder by welding. (As shown in the figure below) According to different geometric shapes, it can be divided into spherical, elliptical, dish-shaped, spherical cap, cone and flat cover, etc., of which spherical, elliptical, dish-shaped, spherical cap-shaped heads are also collectively referred to as Convex head. In welding, it is divided into butt welding head and socket welding head. Used in various container equipment, such as storage tanks, heat exchangers, towers, reactors, boilers and separation equipment, etc.
The head materials are carbon steel (A3, 20#, Q235, Q345B, 16Mn, etc.), stainless steel (304, 321, 304L, 316, 316L, etc.), alloy steel (15Mo3 15CrMoV 35CrMoV 45CrMo), aluminum, titanium, copper, nickel And nickel alloys, etc.
