Dished Elliptical Heads for Tanks

Dished Elliptical Heads for Tanks

Elliptical heads, also referred to as dished heads, are a crucial component in the design and construction of pressure tanks and vessels. These heads are designed to efficiently distribute pressure, offering both structural integrity and performance advantages in industrial applications. This document introduces two types of elliptical heads based on specific design parameters: 2:1 and 1.9:1 aspect ratios.

Type 2:1 Elliptical Head

The 2:1 elliptical head, also known as a semi-elliptical head, is widely utilized due to its robust pressure-handling capabilities and balanced design. Its geometrical specifications are defined as follows:

• Inside Diameter (Di): Derived as Do - 2 × t, where Do is the outside diameter and t is the wall thickness.

• Crown Radius (CR): Calculated as 0.9 × Di. This larger radius allows for even pressure distribution.

• Knuckle Radius (KR): Set as 0.17 × Di, ensuring smooth transitions between the dished and straight sections.

• Straight Flange Height (SF): Determined according to the specific application or design specifications.

• Dished Height (DH): Measured as 0.25 × Di, providing the depth required for structural integrity.

• Total Height Inside (THi): A summation of SF and DH, representing the overall internal height.

The 2:1 elliptical head’s design provides a balanced combination of strength and material efficiency, making it a popular choice for a variety of tank applications.

Type 1.9:1 Elliptical Head

The 1.9:1 elliptical head offers a slightly modified aspect ratio for applications requiring specialized performance. The design specifications are as follows:

• Inside Diameter (Di): Defined as Da - 2 × t, where Da is the outside diameter and t is the wall thickness.

• Crown Radius (CR): Determined as Di / 1.16, providing a tailored pressure distribution.

• Knuckle Radius (KR): Calculated as Di / 5.39, offering a unique geometric profile.

• Straight Flange Height (SF): Defined in accordance with the NF E 81-103 standard.

• Dished Height (DH): Measured as Di / 3.8, ensuring appropriate depth for pressure resistance.

• Total Height Inside (THi): Summed up as SF + DH, representing the internal height.

The 1.9:1 elliptical head is engineered for applications requiring enhanced customization while maintaining structural efficiency.

Legend for Design Parameters

• t: Wall thickness.

• Do: Outside diameter.

• Di: Inside diameter.

• CR: Crown radius.

• KR: Knuckle radius.

• SF: Straight flange height.

• DH: Dished height.

• THi: Total height inside.

Conclusion

Elliptical heads with 2:1 and 1.9:1 ratios serve as vital components in tank manufacturing, catering to various industrial needs. The differences in their geometric parameters allow for flexibility in design and performance optimization, ensuring compatibility with diverse operational requirements.

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

Carbon steel Hemispherical spherical head for Industrial hot blast stove

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 .

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