Head

Head refers to the element used to close the end of the container to isolate the internal and external media, also known as end cap. The head of a cylinder is generally a rotary shell. According to the shape of the head surface, it can be divided into convex, conical, flat and combined shapes. Convex head refers to the head whose outer surface is convex, such as semi spherical, elliptical, dished and non folded spherical head. Some gas cylinders adopt a combined bottom head with convex face inward, which can not only ensure the strength, but also meet the requirements of safe use.

 

The head is a component of the container, which is connected to the cylinder by welding. According to the different geometric shapes, it can be divided into spherical, elliptical, saucer shaped, spherical crown shaped, conical shell and flat cap, among which spherical, elliptical, saucer shaped and spherical crown shaped heads are collectively referred to as convex heads. In terms of welding, it is divided into butt welding head and socket welding head. It is used for various vessel equipment, such as storage tank, heat exchanger, tower, reactor, boiler and separation equipment. Materials include 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.