The use of headers is extensive

The use of headers is extensive

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The head refers to the element used to close the end of the container so that the internal and external media are isolated, also known as the end cover. The head of a cylindrical vessel is usually a rotary case. According to the shape of the head surface, it can be divided into convex shape, conical shape, flat shape and combination shape. Convex heads refer to heads with convex outer surface shape, such as hemispherical, oval, disc and unflanged spherical heads. Some gas cylinders adopt convex inward combined bottom head, which can not only ensure the strength, but also meet the needs of smooth operation.

A head is a part of a container that is welded to the cylinder. According to the different geometric shape, it can be divided into spherical, oval, disc, spherical crown, cone shell and cap, among which spherical, oval, disc, spherical crown head is collectively referred to as convex head. In the welding is divided into butt welding head, socket welding head. Used for all kinds of container equipment, such as storage tank, heat exchanger, tower, reactor, boiler and separation equipment, etc. The 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 alloy, etc.

The head is the end cover of the pressure vessel, which is a main bearing part of the pressure vessel. Its role is to seal. One is to make the upper and lower bottom of the can-shaped pressure vessel, and the other is that the pipe is at the end and is not ready to extend forward, so a head is used to seal the pipe in the form of welding. Similar products to the head are blind plates and tube caps, but those are removable. After the head is welded, it can not be disassembled.

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