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The shallow dished head 2500 mm is a flanged end component with a low-profile crown. Its suitability for a vessel, tank or other equipment is established by the equipment design.
Germes-Ural manufactures shallow dished heads 2500 mm by cold flanging to agreed technical specifications and drawings. Applicable GOST 34347-2017 requirements are considered for welded steel vessels.
Specifications for shallow dished heads 2500 mm
| Parameter | Value |
|---|---|
| Internal diameter D | 2500 mm |
| Thickness s | 3–22 mm; specific combination according to the project |
| Crown radius R | 3000–3500 mm |
| Knuckle radius r | 100 mm |
| Straight flange h1 | Catalogue value ≥ 3.5s; final dimension according to the drawing |
| Dish depth h2 | According to the agreed profile |
| Head type | Shallow dished flanged head |
| Manufacturing | Cold flanging |
| Documentation | Technical specifications and drawing; applicable GOST 34347-2017 and design requirements |
| Material | Carbon, low-alloy and stainless steel; other materials by agreement |
| Heat treatment | Where required by the material and project |
| Acceptance inspection | Geometry, thickness, surface and compliance with the order |
| Supply | Russia and CIS countries |
Typical dimensions for D = 2500 mm
| Thickness s, mm | Flange h1, mm | R, mm | r, mm |
|---|---|---|---|
| 3 | ≥ 10,5 | 3000–3500 | 100 |
| 4 | ≥ 14,0 | 3000–3500 | 100 |
| 5 | ≥ 17,5 | 3000–3500 | 100 |
| 6 | ≥ 21,0 | 3000–3500 | 100 |
| 8 | ≥ 28,0 | 3000–3500 | 100 |
| 10 | ≥ 35,0 | 3000–3500 | 100 |
| 12 | ≥ 42,0 | 3000–3500 | 100 |
| 14 | ≥ 49,0 | 3000–3500 | 100 |
| 16 | ≥ 56,0 | 3000–3500 | 100 |
| 18 | ≥ 63,0 | 3000–3500 | 100 |
| 20 | ≥ 70,0 | 3000–3500 | 100 |
| 22 | ≥ 77,0 | 3000–3500 | 100 |
The table retains the published production dimensions for 2500 mm. The R interval and h1 ≥ 3,5s condition describe the company catalogue profile, rather than a universal GOST profile. Exact radii, dish depth, flange and finished thickness are recorded in the drawing; allowable pressure is confirmed by calculation.
Manufacturing shallow dished heads 2500 mm
When forming the 2500 mm head, the crown is joined to the knuckle r = 100 mm. The exact R value is selected within the agreed range 3000–3500 mm. Blank preparation, flange and weld edge are coordinated with thickness, material and the drawing.
- Mating diameter 2500 mm and ovality
- Crown profile and smooth transition to the flange
- Thickness after forming
- Straight flange length and edge condition
- Surface condition and order documentation
Applications of heads 2500 mm
Specify the head requirements for the intended equipment: Heads for horizontal air receivers, Heads for cylindrical pressure vessels. These pages help define the equipment requirements; they do not automatically establish a diameter or allowable operating pressure.
The shallow dished configuration 2500 mm is agreed for its profile, loads, material and assembly conditions. Atmospheric, internal pressure or external pressure service must be stated in the equipment design where applicable.
Profile 2500 mm and requirements GOST
The geometry of the shallow dished profile 2500 mm is specified by technical specifications and the engineering drawing. The dimensions on this card cannot be applied automatically to an elliptical or torispherical head of the same diameter.
GOST 34347-2017 sets general technical requirements for welded steel vessels. Calculations use the project documentation and an applicable method, including GOST 34233.2-2017 within its scope. The dimensional table does not establish an allowable pressure.
Handling within production
Handling 2500 mm must preserve the profile and machined edge. Lifting contact points and fixtures are agreed for weight and construction. Include special customer handling requirements in the documentation.
For the 2500 mm head, include information specific to the shallow dished profile, knuckle radius 100 mm and selected R value. The part designation and document revision must match in the order and assembly specification.
Materials
Carbon steels
20YuCh, 09G2S, St3sp5, St20, 17G1S
Aluminium alloys
AMg3, AMg5, AMg61 (1561), R-1407
Stainless steels
08(12)Kh18N10T, 10Kh17N13M2T, AISI 321, AISI 304, AISI 316Ti and Other
Titanium alloys
VT1-0, VT5, VT6, VT8, VT9, OT4-O
Material selection for 2500 mm
The material for the shallow dished head 2500 mm is matched to the shell, medium and temperature. State the exact grade, finished thickness, corrosion allowance and surface condition. Availability of a material does not establish feasibility of every size combination without a project review.
Quality inspection of heads 2500 mm
Inspection of the shallow dished head 2500 mm covers the joint, crown profile and knuckle r = 100 mm. R, h1 and h2 are checked against the same agreed drawing revision. Weld inspection requirements are specified for welded blanks.
- Diameter 2500 mm and mating tolerances
- Profile radii and heights according to the drawing
- Thickness in the specified zones
- Surface and edge condition
- Compliance of openings and connections with the order
Why choose Germes-Ural
- Dished end manufacturing since 2004;
- Our own manufacturing facility;
- Shallow dished heads: diameters 600–4300 mm;
- Shallow dished head thickness: 3–22 mm, as specified;
- Manufactured to GOST, technical specifications and customer drawings;
- Quality checks throughout manufacturing;
- Delivery across Russia and CIS countries.
Frequently asked questions
Can lifting contact requirements be specified for 2500 mm?
Yes. State restrictions on surface contact and the requirements for temporary or permanent fixtures specified by the project.
What radii are specified for shallow dished head 2500 mm?
The production table lists R = 3000–3500 mm. This is a configuration range: the exact radius and corresponding dish depth are specified in the agreed drawing.
What knuckle is specified for the shallow dished head 2500 mm?
The published configuration specifies r = 100 mm. Straight flange height h1 and edge preparation are agreed separately for the thickness and welded joint.
What information is needed for a quotation?
Provide the drawing, material, thickness, quantity, medium, design loads and temperature. Include edge preparation, openings, inspection and delivery requirements.
What is the lead time for shallow dished head 2500 mm?
Lead time is confirmed after reviewing blank availability, batch size and processing operations. The indicative lead time of 7 days or more is confirmed in the quotation for the agreed specification.
Delivery of shallow dished heads 2500 mm
The delivery method for the 2500 mm head is selected for its actual height, weight and batch quantity. Packaging must protect the profile and prepared weld edge. Special surface requirements are included in the protection specification.
Specify the destination and unloading conditions. Transport, load orientation and packaging are agreed with the delivery schedule and batch contents.
Order shallow dished heads 2500 mm
Germes-Ural specialists will prepare a quotation and confirm the material, thickness and geometry requirements for your project.
This page describes the shallow dished head 2500 mm. All sizes shallow dished heads.