Selection of end caps in pressure vessels
Thread Content
Operating pressure: 0.035 MPa; design pressure: 0.35 MPa. Volume: 85 m3. What type of head should be used? Why was such a head chosen?
It is better to choose an oval head. Since the pressure is not high, it saves material and is easy to manufacture.
It is recommended to use an elliptical head; the main advantage is that, first of all, it has better stress resistance； Second, it is easy to manufacture ； Third, the price is quite affordable.
“Operating pressure: 0.035 MPa; design pressure: 0.35. Volume: 85 m3. What is the unit for design pressure? If the operating pressure is only 0.035 MPa, it belongs to a pressure vessel at atmospheric pressure; in such cases a simpler design is sufficient, with a conical or arched roof, and there is no need to use specially manufactured end caps.
The design pressure is 0.35 Mpa, which classifies it as a pressure vessel. By the way, what is the difference between oval end closures EHA and EHB? Is it that one refers to the outer diameter while the other refers to the inner diameter? Which to choose, EHA or EHB, during design!
EHA and EHB differ in terms of inner diameter and outer diameter, as well as their reference standards; either one can be chosen when making a selection, depending on the practices of various manufacturers. This is my humble opinion. Please correct me
Reply to 5# stronger0514: For ordinary EHA, we choose this one more often here.
The commonly used type is the eha-type head. If the design pressure specified by the original poster is that low, then either a conical top or a flat top will suffice; there’s no need to use a head at all