The ellipsoidal dished head has a smooth crown and a straight flange for circumferential welding. Carbon steel, stainless steel, and other project-specified materials can be formed according to drawings and applicable standards. The 2:1 geometry keeps the head depth manageable while distributing pressure through the curved section. During forming, roundness, straight-flange condition, wall-thickness change, and the crown-to-edge transition are checked closely. A head that arrives near the specified diameter is easier to align with the shell and normally needs less correction before welding.
Product Parameters
|
Item |
Reference / Option |
|
Head type |
EHA elliptical head, 2:1 profile |
|
Standard reference |
GB/T 25198-2010 |
|
Product |
ellipsoidal dished head |
|
Nominal inside diameter examples |
DN1000 / 2000 / 3000 / 4000 / 6000 mm |
|
Total depth H for examples |
275 / 525 / 790 / 1040 / 1540 mm |
|
Material options |
Carbon steel, stainless steel, alloy steel; project material by drawing |
|
Forming route |
Press forming or cold/hot spinning, selected by size and thickness |
The diameter and depth examples are taken from the EHA elliptical-head table in GB/T 25198-2010. Final thickness, edge allowance, and inspection requirements follow the approved drawing.
Main Applications
• Pressure-vessel shells for chemical processing, separation, and heat exchange.
• Storage and buffer tanks used in water, energy, and general industrial systems.
• Boiler, reactor, and process-equipment fabrication where an ellipsoidal dished head is specified on the vessel drawing.
Our Factory
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Changhui has more than twenty years of experience in head and pipe-fitting production. The workshop covers stamping, cold and hot spinning, polishing, non-destructive testing, storage, and shipping. Forming equipment includes 1200T, 1000T, 500T, and 315T hydraulic presses plus dedicated spinning lines. The route is selected around diameter, thickness, material, and order quantity.
FAQ
Q: What information is needed for a quotation?
A: Please provide diameter, nominal thickness, material grade, shape, straight-flange length, quantity, standard, and any inspection requirement.
Q: Can the ellipsoidal dished head be supplied with edge preparation?
A: Yes. Beveling and other edge work can be arranged when the weld-joint details are confirmed before production.
Q: Are inspection documents available?
A: Material reports, dimensional records, and agreed test documentation can be prepared with the order when specified.
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