Introduction to different types of Caps/Head
Cap is mainly used in pressure vessel end cover, is a very important part of the pressure vessel, also play a role of sealing, and whether to use on the bottom or under the bottom can be, especially some pipeline has done don't want to continue to get stretched, then the pipe welding work with cap, so it has certain sealing performance, the USES almost as blind plate and pipe cap has a lot of similarities, but the difference is that cap would not be performed after sealing the disassembly work, work and other products can be removed.
Theupper sealing head is not only used, but also used together with supporting pipe fittings, including pressure vessels, pipes, flanges, elbows, three-way connections and four-way connections. And the quality of the head itself is based on the use of manufacturers to order, cap manufacturing co., LTD. Head quality is very good, can significantly extend the service life of pressure vessels. Don't worry about long-term use.
Introduction to different types of Caps/Head
The common headsarehemispherical head, saucer head, oval head, spherical head, cone head, flat cover, etc.
In terms of stress, theyare: hemispherical, elliptic, saucer, spherical, conical and flat coverare the worst.
From the manufacturing point of view,flat cover is the most easy, followed by conical, spherical, saucer, oval, hemispherical.
Conical head force isnotgood, but conducive to the uniform distribution of fluid and discharge, the use of more.
1. Hemispherical head
P = 3 MPa; = 133 MPa; C = 1.8 mm; D I =1000 mm; Φ = 1, the hemispherical head wall thickness calculation,nominal thickness of 8 mm, rounded after take straight edge height is 40 mm, the quality of hemispherical head is 107.5 kg.
2.Oval head
With a standard ellipsoidal head, K = 1, whole stamping manufacture, Φ = 1,nominal thickness is 14 mm round after, straight edge height is 40 mm; The mass of the head is 137 kg.
3.Butterfly head
Take Ri=0.9Di, Ri/r=3.0, and refer to the coefficient table to get M=10.18, then the nominal thickness of the butterfly head wall thickness is 14 mm after roundness, and the height of the straight edge is 40 mm. The mass of the head is 135.2 kg.
4.Flat cover
Table is selected by the pressure capacity flat cover coefficient K, and the serial number is the third type. The structure form of flat cover and cylinder fillet welding or other welding is K= 0.44m. 1, cylinder Di= 1000mm, cylinder calculated wall thickness =11.4, the actual wall thickness is 14mm.
