01 / PRODUCT INQUIRY
Start with the shape.
Select a profile. Add your specifications.
An elliptical crown with a straight flange. EHA uses the inside diameter; EHB uses the outside diameter.
D = Dᵢ · Dᵢ / [2(H − h)] = 2
Original schematic based on GB/T 25198-2023, Tables 1–2. Not to scale; dimensions require drawing approval.
GB/T 25198-2023Your inquiry0
Review your items before contacting us.Your selected products will appear here.Add dimensions above, then generate your first inquiry item.
02 / TECHNICAL REFERENCE
Clarity before production.
Specify the profile, diameter basis, material and finished dimensions. Agree the drawing and applicable requirements before placing an order.
Industry references
Profile terminology and product presentation informed by these manufacturers. No affiliation or certification is implied.
GB/T 25198-2023
Heads for pressure vessels. Published 6 August 2023; effective 1 March 2024.
View the official standardAn inquiry is not a pressure rating, design calculation or certificate of conformity.