Head diameters is from 3.5" to 393.7'', and Head thickness is from 0.078" to 11.8''. Pressure vessel heads and tank ends are available in a broad range of sizes, shapes, thicknesses and material specifications.
2:1 Semi-Ellipsoidal Dished Head Bottoms
Haipei Industry proudly presents its premium line of Ellipsoidal Heads 2:1, an essential component in the construction of pressure vessels and tanks designed to meet the demanding requirements of various industrial applications. With a focus on quality, precision, and compliance with international standards, our elliptical tank heads deliver superior performance and adaptability.
Specification:
Material | Carbon Steel;Stainless Steel; Aluminum; Exotic Alloys; Special Steel... |
Main Products | Torispherical; 2:1Semi Ellipsoidal; Hemispherical; Flat Bottom; Floating Heads; Tank Heads; Dish Heads; Dished Ends; Pipe Caps.... |
Surface Treatment | 1. Intermediate & Final stage Heat Treatments; |
Technology | 1.Cold & Hot forming ; |
Test | 1. Liquid Penetrant Examination; |

| Type | Max Diameter (De) | Dish Radius (R) | Knuckle Radius (r) | Straight Flange (h)* | Thickness (S) |
|---|---|---|---|---|---|
| Ellipsoidal Head 2:1 | Max. 8000 mm | 0.833 Di | 0.156 Di | On request* | 2.5 – 60 mm |
| ASME Ellipsoidal Head 2:1 | Max. 8000 mm | 0.9 Di | 0.17 Di | On request* | 2.5 – 60 mm |
| Korbbogen Böden (DIN 28013) | Max. 8000 mm | 0.8 De | 0.154 De | On request* | 2.5 – 60 mm |
*Straight flange dimensions are subject to feasibility studies based on De and thickness.

Versatile Applications
Ideal for medium-pressure vessels such as air receivers and liquefied petroleum gas tanks.
Widely used in industries requiring safe and durable pressure containment solutions.
Optimized Design
Depth of dish equals one-quarter of the head’s internal diameter (ID), ensuring efficient stress distribution.
The inside height combines the depth of the dish and the straight flange, offering tailored configurations for specific requirements.
Economical Solution
Reduced metal thickness compared to other head types, lowering material costs without compromising structural integrity.
Customization
Manufactured using cold or hot forming techniques to accommodate various dimensions, materials, and thicknesses.
Every request undergoes a comprehensive feasibility study to ensure the highest quality and suitability.
Compliance with Standards
ASME-compliant 2:1 elliptical flanged and dished heads meet the rigorous requirements for unfired pressure vessels.

Expertise and Innovation: Decades of experience in producing elliptical tank heads for diverse pressure vessel environments.
Precision Engineering: Advanced fabrication processes ensure precise dimensions and durability.
Customer-Centric Approach: Tailored solutions for every project, with dimensions beyond indicated ranges evaluated for feasibility.
High-Quality Materials: Premium-grade materials to ensure long-lasting performance and safety.
The Ellipsoidal Head 2:1 is characterized by its unique geometry, consisting of a rotating ellipsoidal sphere combined with a cylindrical straight section. This design provides optimal strength and reduces material thickness requirements, making it an efficient and reliable choice for medium-pressure applications. The dish radius is approximately 90% of the diameter, while the knuckle radius is about 17%, ensuring balanced stress distribution and robust structural integrity.
For more information or to discuss your specific requirements, contact Haipei Industry. Our team of experts is ready to assist you with customized solutions, ensuring your pressure vessel needs are met with precision and reliability.

2:1 Semi-Ellipsoidal Dished Head Bottoms Head diameters is from 3.5" to 393.7'', and Head thickness is from 0.078" to 11.8''. Pressure vessel heads and tank ends are available in a broad range of sizes, shapes, thicknesses and material specifications.2:1 semi-ellipsoidal dished head (also known as a 2:1 elliptical head) is a standard, dome-shaped pressure vessel end cap where the major axis (internal diameter, D) is twice the length of the minor axis (d = D / 2) 2:1 Semi-Elliptical Dished End Heads Elliptical Bottoms Forging Casting Techniques Oil Gas Steel Iron Bronze Titanium Polished Formed Tank Heads The Semi Elliptical head looks like a half ellipse. Also known as 2:1 head. Meaning that the width of the ellipse is twice the depth.Dish Ends Calculator is designed for Flat Head, 10% Torispherical Head, 2:1 Ellipsoidal Head, and Hemispherical Head. It is also applicable for Pressure Vessel Asme 2:1 Elliptical Dished Head 2:1 SE head is made from half of an ellipse, so the head depth is a quarter the diameter. The depth is half as much as the hemi head 2:1 Semi Ellipsoidal Dished Ends - Stainless Steel We are a China supplier for manufacturing large, thin-walled heads and dished ends. Our dish ends are suitable for every application requirement.

Elliptical Tank Heads ASME elliptical 2:1 flanged and dished heads are used in the construction of tanks and for unfired pressure vessels, such as liquefied petroleum gas and air Diameter: 250mm--16000mm. Reduction R: About 10%. Material: Carbon steel, Stainless steel, Aluminum,Titanium,etc. According to customers' requirement.Pressure Vessel 2:1 Semi-elliptical Dished End Heads Elliptical Bottoms Semi-Ellipsoidal & Torispherical Heads | Standard Sizes Semi-ellipsoidal (2:1) and torispherical dished ends up to 2.8m diameter, 5-100mm thick. Download our standard size sheets or get a quote in 1 working day. 2:1 Elliptical Flanged & Dished Tank Head 2:1 elliptical tank head is fabricated to have a specific shape instead of a particular dish or knuckle radius Head diameters is from 3.5" to 393.7'', and Head thickness is from 0.078" to 11.8''. Pressure vessel heads and tank ends are available in a broad range of sizes, shapes, thicknesses and material specifications 2: 1 Semi Ellipsoidal End Caps Dish Head Cap Ends Head Elliptical tank heads are an economical solution for medium pressure tanks , due to the reduced metal thickness requirement Carbon Steel 2:1 Semi Elliptical Tank Heads 30-380 Inches

Company information
Haipei industry can produce all types of dished ends heads. They can be manufactured from a number of steel types including pressure vessel and boiler quality, chrome moly and stainless steel. The company also offers 2:1 semi ellipsodial, hemispherical petals, torispherical ends as well as conical knuckled sections.

Haipei industry company is a leading producer of various types of dished heads, cones, and other special pressed products in different materials grades like Carbon Steel, Stainless Steel, Duplex, Super Duplex, Aluminum, Nickel and Nickel Alloys, Copper and Copper Alloys, Titanium and Its Alloys, Zirconium and all cladded material combinations.
Our Services
We offer our products in the following materials:
Carbon Steel: SA36, SA516-70, SA387 Grade 5 Class 2 (Forming Only), SA285 Grade C (Forming Only)
Stainless Steel: SA240T304/304L, SA240T316/316L, SA240T304H (Forming Only), SA240T904/904L (Forming Only)
Copper: O-Temper Material (Forming Only)
Aluminum: O-Temper Material (Forming Only)

Quality assurance
Quality is the most important aspect of strength.We will make the material from the material to the end of the monitoring, making sure that each part can be of high quality according to the regulations.Each program will be monitored to ensure any errors in the manufacturing process.
Competitive price guarantee
With years of experience, we can offer our customers the most competitive prices.At the same time, as a powerful factory, we can offer customers more favorable prices than other factories.
Delivery time guarantee
We will strictly control the manufacturing schedule to ensure punctual delivery.It can satisfy the customer's time schedule and ensure the continuous production of customers.
Packaging & Shipping
2:1 Semi-Ellipsoidal Dished Head Bottoms
1. Iron Frame2. Wooden Box3. Iron pallet4.Wooden pallet.5.Professional fixation6. Curstomed requirment

FAQ

Q: What’s the information should I provide when inquiry?
A: Thanks for your question. If you have drawings, we will be entirely in accordance with production drawings . If you do not have the drawing, you can tell me the product data. There are several important data, such as material, type of head( We have elliptical head, hemispherical head, dished head, flat head, etc. ),diameter, thickness, special tolerances or requirements. We can do the drawings according to your requirements, and you confirm that the final product drawings.
Q: what are surface treatment of the product?
A:Thanks for your question. For carbon steel products, we sandblasting descaling product surface. For stainless steel products, we use acid to remove surface oil and impurities.
Q: How do you ensure the quality of products?
A: Thanks for your question.Our production staff is trained through national quality department, and obtain the corresponding certificate, with years of production and design experience. Weld must undergo X-ray inspection to ensure that no defects.
Q: Can you help us matching related products?
A: Thanks for your question. Our company also is surrounded by a lot of ancillary businesses, such as flanges, boiler, oil refining equipment, etc. We can help you matching the highest quality products with the lowest prices .
Contact us

Contact: Frieda
Phone: +86 182 6483 8918
E-mail: [email protected]
Add: No.76,South.Road,Daiyue District,Tai'an,Shandong Province