ASME Dished Head

Manufacturer of ASME Dished Head

Dingjin is a professional manufacturer specialized in pressure vessel dish end, spherical shell plate and the third classification pressure vessel. We fabricate and inspect as per cited code and additional requirements specified in purchase order. Received good feedback on quality, efficiency and service. In Dalian Dingjin's opinion, what we are making not only pressure vessel parts, but also the armor of life.

Why Choose Us

Our Factory

The company was established in 2000 and covers an area of 10000 square meters. In the past 24 years, we have provided more than 200,000 products to domestic and foreign customers and received good feedback in terms of quality, efficiency and service.

Product Applications

The products are widely used in many other industries, such as electronics, construction, heating, textiles, sewage management, machinery, nuclear power, aerospace, pressure vessels and military industries.

Professional Personnel

The engineers and technicians has been engaged in dish heads fabrication over 10 years. They keep on learning new code and researching advanced work craft to meet the demand of market.

Comprehensive Service

From the beginning of marketing to the ending of sales-after service, we have 9 functional department to assure the product quality and each feedback from clients could be solved quickly and correctly.

Benefits of ASME Dished Head

Height restriction compatibility

These heads have a flatter or lower profile, making them ideal for pressure vessels with height restrictions.

Thicker construction

Based on design pressure and vessel size, ASME heads are thicker than semi-elliptical heads for enhanced strength and durability in moderate-pressure applications.

Offset Seam

The head possesses an offset in the head-to-shell circumferential seam, which is usually managed at a 3:1 ratio. This configuration helps to manage stress concentrations and ensure structural integrity.

Unique applications

ASME heads can be used in various industries and moderate-pressure applications. Their flatter heads make them ideal for mixing tanks, as the mixer can be mounted at a lower position in the tank.

Types of ASME Dished Head

Hemispherical Dished Ends

Hemispherical dished ends feature a half-spherical shape, providing excellent pressure containment and distributing stresses evenly across the vessel. They are commonly used in high-pressure applications where maximum strength and volume efficiency are required.

Ellipsoidal Dished Ends

Ellipsoidal dished ends feature a curved shape resembling a segment of an ellipse. They balance strength, volume efficiency, and cost-effectiveness, making them suitable for a wide range of pressure vessel applications.

Torispherical Dished Ends

Torispherical dished ends, known as ASME flanged and dished (F&D) heads, feature a toroidal shape with a flanged edge. They provide enhanced structural integrity and pressure resistance while allowing for easy attachment to the vessel body.

Conical Dished Ends

Conical dished ends feature a conical shape, tapering towards the vessel’s centre. They are often used in applications where space constraints or specific flow requirements dictate a conical geometry.

Semi-Ellipsoidal Dished Ends

Semi-ellipsoidal dished ends combine the characteristics of ellipsoidal and hemispherical dished ends, offering a compromise between strength, volume efficiency, and cost-effectiveness.

Flanged Dished Ends

Flanged dished ends feature a flat flange around the perimeter, allowing for easy attachment to the vessel body using bolts or welding. They are commonly used in applications where frequent access to the vessel interior is required.

Application Of ASME Dished Head

Dished ends find application in a wide range of industries, including:

Oil and gas

Chemical processing

Power generation

Pharmaceutical manufacturing

Food and beverage processing

Aerospace and defense

Specification of ASME Dished Head

Type	Dished Head
Manufacture Standard	As per ASME Ⅷ-1,2023 UG79, &UG81
Inner Diameter	1700mm
Min Thk. A/F	20mm
Straight Flange	50mm
Cutting Method	Gas Cutting
Forming Method	Cold Forming
Heat Treatment	No Required
Material Designation	Stainless Steel 316 L
Material Standard	SA 516 Gr.70N
Surface Treatment	Sand Blasting
NDT Method & Acceptance Creteria	No Required

Lead Time

Quantity (pieces)	1 - 100	101 - 1000	1001 - 10000	> 10000
Lead time (days)	7	10	15	To be negotiated

Packaging & Shipping

productcate-674-293

productcate-666-257

productcate-1104-712

Certifications

FAQ

Q: What is a dished head for a pressure vessel?

A: Dished heads, also known as dish ends or tank heads, are important components used in various industries, including pressure vessels, storage tanks, and boilers. These curved structures serve as end closures, providing strength, structural integrity, and sealing properties to the vessels they are attached to.

Q: What shape is a dished end?

A: Torispherical Dishend: This is the most common type of dishend. It has a shape resembling a torus (donut), with a knuckle radius at the transition between the cylindrical body and the curved end. Ellipsoidal Dishend: Ellipsoidal dishends have a shape resembling an ellipse.

Q: What is hot forming of dished ends?

A: In simple terms, Dishend Hot Forming is a specialized manufacturing process used to shape and manipulate metal sheets into curved or domed structures, commonly known as dish ends or heads.

Q: How are dished ends made?

A: Dished and flanged ends are cold formed by firstly pressing the spherical radius followed by spinning the corner radius and straight flange. They can also be dished only (pressed), flanged only (spun) or conical spinning's.

Q: Why do pressure vessels have domed ends?

A: The design also helps to prevent the vessel from buckling or collapsing under the pressure. Providing strength and stability to the pressure vessel is an extremely important function of dished ends. The smooth curve of a dished end helps to balance the stress more evenly across the surface of the vessel.

Q: What is the difference between dished and elliptical head?

A: An elliptical head is stronger than a dished head, but an elliptical head of the same diameter is somewhat deeper than a dished one and is slightly more difficult to manufacture than a dished head. It consumes more materials and costs a bit more, and the difference in volume remains small.

As one of the leading ASME dished head manufacturers in China, we warmly welcome you to buy high quality ASME dished head for sale here and get quotation from our factory. For price consultation, contact us.

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