The shape characteristics of the head

The shape characteristics of the head

Head is a part of the container according to the different geometric shape, can be divided into spherical, oval, disc, dome, cone shell and cover, among which the spherical, oval, disc, spherical crown type head is also known 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. Material has 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.

Spherical heads: Spherical heads shall be used for convex heads in boilers and pressure vessels. The ratio of its axis to its axis cannot be greater than 2.5.

Non - hem spherical punch head: It will have a significant shape change when connected to the cylinder. Therefore, the value is suitable for small diameter and low pressure containers. When using this head, there will be a large additional bending stress, so the radius of our sphere should not be larger than the inner diameter of the cylinder.

Disc head: It is a ball head with a hem. It has a large bending stress, so the use of the effect is not very good, when the use of disc head, our ellipsoid head is mainly to do membrane stress.

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