VESSEL HEADSPrepare an inquiry →Home / Products / Torispherical Heads
Torispherical / Flanged & Dished Heads
Flanged and dished heads / dished ends · 碟形封头
Profile and terminology
A torispherical head combines a spherical crown, a rounded knuckle and a straight flange. It is also described as a flanged and dished head. The crown radius and knuckle radius are important parts of the profile definition.
GB/T 25198-2023 models: THA / THB
THA uses the inside diameter and THB uses the outside diameter in this GB/T 25198-2023 inquiry tool. The phrase dished head can refer to several profiles: include your standard and drawing rather than ordering by the common name alone. Do not assume that a profile under another standard has the same radii.
What to include in your inquiry
Diameter basis; crown radius; knuckle radius; straight flange length; depth; nominal and minimum formed thickness; material grade; quantity.
Use millimetres for dimensions. Identify the exact material grade rather than only writing “steel” or “stainless steel”. You can also include edge preparation, inspection requirements, delivery needs and a drawing reference in the notes.
Configure torispherical headsThe configurator creates an inquiry list. The email button opens your mail application; it does not submit an order or send a message automatically.
Drawing and design review
These descriptions identify geometry and information needed for an inquiry. They do not establish allowable pressure, certify compliance or replace a vessel design calculation. Confirm the applicable standard, drawing and final dimensions before ordering.
GB/T 25198-2023 — official standard referenceTorispherical and dished head dimensions for a quotation
Searching for a torispherical head, flanged and dished head or dished end? Specify the exact profile. A shallow dished end and a torispherical pressure vessel head should not be treated as interchangeable solely because their trade names overlap.
| Diameter | State inside or outside diameter; identify THA or THB when using the GB/T inquiry profiles. |
|---|---|
| Crown and knuckle radii | Provide both radii from the approved drawing. Do not infer them from diameter alone. |
| Depth and straight flange | Separate the curved portion depth from the straight flange and overall height. |
| Thickness | Specify nominal thickness and the minimum thickness required after forming. |
Are all flanged and dished head dimensions the same?
No. Profile proportions and tolerances depend on the applicable standard and drawing. Send the design code, radii and dimensional requirements with your inquiry so the requested profile can be reviewed.
Torispherical / Flanged & Dished Heads from Bingming
Contact Linyi Bing Ming Head Plate Manufacturing Co., Ltd. about manufacturing requirements for your boiler or pressure vessel project. Product photographs and company records are available in our catalog.
View torispherical / flanged & dished heads product photographs · Explore the factory and product catalog
How do I request a quotation?
Select a profile, enter the dimensions in millimetres, specify the material grade and quantity, and add drawing or inspection requirements. Generate an inquiry item and use the email button to prepare your message.
Which material should I specify?
Provide the exact grade required by your drawing, such as Q345R or S30408, rather than only stating carbon steel or stainless steel. Material availability, forming requirements and suitability for the intended service need confirmation for each project.
Does a GB/T profile imply ASME certification?
No. The GB/T 25198-2023 diagrams describe the profiles used by this inquiry tool. If a project requires another code, provide its designation and drawing for review; no ASME certification is claimed here.
Request a quotation