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Welding ASME Torispherical Head Pressure Vessel Dished Head Types

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Welding ASME Torispherical Head Pressure Vessel Dished Head Types

Welding ASME Torispherical Head Pressure Vessel Dished Head Types
Welding ASME Torispherical Head Pressure Vessel Dished Head Types Welding ASME Torispherical Head Pressure Vessel Dished Head Types Welding ASME Torispherical Head Pressure Vessel Dished Head Types

Large Image :  Welding ASME Torispherical Head Pressure Vessel Dished Head Types

Product Details:
Place of Origin: CHINA
Brand Name: HaiQun
Model Number: ASME / ANSI B16.9 UNS S31803 / 2205
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: Negotiable
Packaging Details: wooden box and iron shelf or as percustomers requirement
Delivery Time: 30-60 work days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram

Welding ASME Torispherical Head Pressure Vessel Dished Head Types

Standard: SCH.10, SCH.10S, SCH.20, SCH.30, SCH.40, SCH.40S, STD Size: 8 In. To 48 In
Outer Diameter: 6mm - 200mm Reduction Ratio: About 10%
General: Semi Elliptical Head Material: Carbon Steel Stainless Steel/316 Stainless Steel
Connection: Welding Thickness: T2mm–300mm
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Welding ASME Torispherical Head


ASME Torispherical Head

89mm 500MM ASME PED Torispherical Dished Head Types Of Dish End In Pressure Vessel



In pressure vessel design, various types of dished heads, also known as dish ends, are used to close off the ends of the vessel. Two common types of dished heads are torispherical and ellipsoidal heads. Let's discuss each type:

  1. Torispherical Dished Head:

    • Torispherical heads are widely used in pressure vessels due to their favorable mechanical properties and ease of fabrication.
    • These heads have a dish radius (r) that is typically 6% of the head's diameter (D), and a knuckle radius (k) that is usually 10% of D.
    • The overall shape of a torispherical head resembles a portion of a sphere blended with a smaller radius dish at the center.
    • They provide good structural strength and are suitable for medium to high-pressure applications.
    • Torispherical heads are designed and fabricated in accordance with standards such as ASME (American Society of Mechanical Engineers) Section VIII Division 1 or Division 2, and PED (Pressure Equipment Directive) in Europe.
  2. Ellipsoidal Dished Head:

    • Ellipsoidal heads, also known as elliptical heads, have a shape that closely resembles a segment of an ellipsoid.
    • These heads have two radii: a major radius (R) and a minor radius (r).
    • The major radius is typically equal to the vessel's inside diameter (D), while the minor radius is usually 0.9 times the major radius.
    • Ellipsoidal heads provide smoother internal transitions, which can be beneficial for reducing stress concentrations.
    • They are commonly used for low to medium-pressure applications and are designed according to codes and standards such as ASME Section VIII.

It's important to note that the specific dimensions and design criteria for dished heads depend on factors such as the pressure rating, material properties, and applicable codes and regulations. Consulting with a qualified engineer or referencing the appropriate design codes and standards is crucial when selecting and designing dished heads for pressure vessels.



Brand Name: HaiQun
Diameter: 89mm--10000mm
Thickness: 2mm--300mm
Reduction Ratio: about 10%
Material: 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.
Forming method: Hot forming,cold forming
Surface Treatment: Sand Blasting,Pickling,oil,discaling
Inspection: UT,RT,MT,PT,TOFD.
Applicable Standard: ASME ,PED and GB
Certificate: ISO9001,ISO45001,OHSAS18001

Such as oil, chemical industry, water conservancy, electric power,
boiler, machinery, metallurgy, sanitary construction etc.

Package: Wooden cases ,wooden pallet,Steel pallet or as per customers requirement
Customized Product: Available


Material Carbon Steel; Stainless Steel; Special Steel
Size 50-10000mm
Thickness 2mm--300mm
Surface Treatment 1. Intermediate & Final stage Heat Treatments;
2. Sand / Shot Blasting after Heat Treatment;
3. Weld Edge Preparation (Manual & Machined)
Reduction ratio About 10%
Certificate ISO9001
Technology 1. Cold & Hot forming;
2. Hot Pressed Hemispheres and Cold Formed Segmental Hemispheres;
Applicable standard ANSI, ASME, MSS, API, DIN, JIS, BS. AWWA
Test 1. Liquid Penetrant Examination;
2. Ultrasonic Testing;
3. 100% Radiography Testing of weld seams;
4. Magnet Particle Examination;
5. Inspection under various Third party Inspection Agencies
6. NDT( after forming): DPT, RT, MPI, UT;
7. NDT: 100% DPT, UT & RT OF weld joint
Connection Welding
Application Pressure vessel



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Q: Why choose us?

A: Our company has been in the header manufacturing business for more than thirty years. We have rich international experience and professionalism, and we can provide customers with a variety of high-quality header products.


Q: Can we provide OEM/ODM service?

A: Yes.Please feel free to contact us for further details.


Q: What are your terms of payment?
A: One is to telegraphic transfer 30% of the deposit before production the remaining 70% to the copy of the bill of lading;The other is an irrevocable 100% sight L/C


Q: Can we visit your factory?
A: A warm welcome.Once we have your itinerary we will arrange for a professional sales team to follow up your case.


Q: Can you provide samples?
A: Yes,the sample of general size is free of charge,but the buyer needs to pay the shipping fee.



Contact Details
Yixing Haiqun Machinery Technology Co., Ltd.

Contact Person: Mr. Gao

Tel: +86 18015328118

Fax: 86-180-1532-8118

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