Selection of pressure vessel heads
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Hello, everyone! I would like to ask: pressure vessel heads come in oval, butterfly, hemispherical, flat-bottomed, conical, and crow’s head shapes. What are the differences when choosing among them? In what operating environments are they used? For oval and butterfly shapes, inner and outer diameters need to be considered when making a choice – what points should be taken into account?
Elliptical end caps are most commonly used for medium and low-pressure vessels, while spherical end caps are used for high-pressure equipment.
The crown shape should be spherical... The most commonly used is the elliptical head, while other shapes are less used...
It’s too troublesome; I can’t finish answering it in such a short time.
Elliptical heads are the most commonly used, while spherical heads are generally used for high-pressure vessels. Crown heads are used for intermediate partitions in tower-type containers, while cone heads serve mainly as structural transitions.
Dish head closures are generally used in less critical applications; the designer can determine their dimensions and then carry out the spinning process. It was used quite frequently in the 1970s and 1980s; back then, it was heated manually and then smashed.
Except for the elliptical and disc end caps that are butted to seamless steel pipes, which are based on the outer diameter, the others are generally based on the inner diameter. In addition to the transition section, conical end caps are also used for the upper and lower ends. If the openings need to be large, the use of conical end caps eliminates the need for such large openings. Moreover, when it is necessary to drain the material completely, conical end caps are also employed for the lower end. Dish head seals are commonly used for equipment abroad. High-pressure vessels also have a flat cover structure in addition to the hemispherical head. In addition to being used for dividing chambers, crown-shaped end caps are generally used for the floating heads of floating-head heat exchangers.
Select according to the pressure-bearing conditions of the pressure equipment!
Who has a relatively complete set to study* it?
The type of end cap to use depends on the stress applied. Spherical heads experience the best stress distribution (uniform in all directions), followed by elliptical and butterfly shapes. Elliptical heads are the most widely used and common.
It depends specifically on the structural requirements and strength calculations