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The torispherical head 3500 mm Type B is an end component for a vessel, selected according to its design.
Germes-Ural manufactures Type B heads of diameter 3500 mm by cold flanging to GOST 34347-2017 and the agreed drawing. Strength calculations use GOST 34233.2-2017.
Specifications for torispherical heads 3500 mm Type B
| Parameter | Value |
|---|---|
| Diameter D | 3500 mm |
| Profile type | Torispherical, flanged, B |
| Wall thickness s | 6–22 mm; specific configuration subject to design calculations |
| Crown radius R | 3150 mm |
| Knuckle radius r | 595 mm |
| Dish depth h2 | According to the agreed drawing |
| Straight flange height h1 | Specified for the thickness and welded joint |
| Manufacturing process | Cold flanging |
| Documentation | GOST 34347-2017, GOST 34233.2-2017, technical specifications and customer drawings |
| Materials | Carbon, low-alloy and stainless steels; other materials as specified |
| Heat treatment | As required by the material and project |
| Inspection | Geometry, thickness, surface and compliance with the specification |
| Delivery | Russia and CIS countries |
Profile dimensions for D = 3500 mm, Type B
| D, mm | Type | R, mm | r, mm | s, mm | Heights h1 and h2 |
|---|---|---|---|---|---|
| 3500 | B | 3150 | 595 | 6–22 | According to the drawing |
R and r follow the company catalogue geometry for Type B: R = 0,9D and r = 0,17D, referenced to the internal surface. The table does not replace thickness calculations or agreement of the finished heights.
Manufacturing torispherical heads 3500 mm Type B
Type B manufacturing requires the crown-to-flange transition to be agreed for its own profile. A Type A checking template cannot be used merely because the mating diameter is the same. Edge preparation and straight flange length are specified separately in the drawing.
For diameter 3500 mm, agree the blank, joint preparation and finished Type B profile inspection plan. Radii R = 3150 mm and r = 595 mm are recorded in the working drawing together with thickness and surface requirements.
- Mating diameter 3500 mm and ovality
- Profile R=3150 mm, r=595 mm
- Finished part thickness
- Straight flange profile and edge preparation
- Surface condition and documentation requirements
Applications of torispherical heads 3500 mm Type B
Check the requirements for the equipment receiving the head: Heads for flare separators (FS), Heads for clarification filters. These links describe the equipment applications; suitability of a specific head is confirmed by the equipment design.
Specify Type B separately from the diameter. Submit the equipment operating conditions, openings and additional loads for review of the selected profile.
Torispherical head 3500 mm Type B — GOST requirements
Type B differs from Type A in the combination of crown and knuckle radii. Its larger relative knuckle radius is considered together with the crown radius. Selection is confirmed by the vessel design, including loads in the edge region.
GOST 34347-2017 sets general manufacturing requirements for welded steel vessels; GOST 34233.2-2017 is used for calculations. The production range and profile radii are checked against the engineering documentation. For 3500 mm Type B, the catalogue specifies R = 3150 mm and r = 595 mm.
Relationship between radii — Type B
Changing R or r while retaining diameter changes the transition profile. For 3500 mm, reference both radii to the selected type and internal surface; an isolated change creates a different configuration.
For an order of 3500 mm Type B, state the drawing number and revision, material, thickness and acceptance requirements. Diameter 3500 mm does not replace the other specification requirements.
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
Quality inspection of heads 3500 mm Type B
Type B checks cover the radii of the selected configuration, mating profile and finished thickness. Inspection datums for the crown and edge regions are agreed for acceptance. Checks of welded blanks follow the order documentation.
- Diameter 3500 mm checked against the specified datums
- Checks of radii 3150 and 595 mm
- Finished component thickness measurement
- Inspection of the surface and transition zone
- Checks of the straight flange, edge and opening positions
Why choose Germes-Ural
- Dished end manufacturing since 2004;
- Our own manufacturing facility;
- Torispherical heads: diameters 600–4200 mm;
- Torispherical head thickness: specified within the catalogue range;
- Manufactured to GOST, technical specifications and customer drawings;
- Quality checks throughout manufacturing;
- Delivery across Russia and CIS countries.
Frequently asked questions
What radii are specified for torispherical head type b 3500 mm?
A change is reviewed with the complete profile and calculations. The new radius and transition are recorded in the agreed drawing.
Can A be replaced with B without changing the design?
No. B uses different R and r ratios. Equal mating diameters do not establish strength, height or vessel compatibility.
What information is needed for a quotation?
Provide the design pressure and temperature, medium, material, thickness, profile drawing and quantity. For 3500 mm Type B, also specify R = 3150 mm and r = 595 mm.
What is the lead time for torispherical head type b 3500 mm?
The lead time is confirmed after reviewing the material, thickness, batch size and processing requirements. The indicative lead time of 7 days or more is confirmed in the quotation.
Which material grades are available for torispherical head type b 3500 mm?
The grade is selected to suit the shell material, medium, temperature and welding process. Availability of a particular combination is confirmed after reviewing the project.
Delivery of torispherical heads 3500 mm Type B
The head of diameter 3500 mm Type B is delivered after packaging and transport arrangements are agreed. Vehicle selection takes into account the actual dimensions, component weight and batch quantity.
Include the delivery destination and unloading restrictions in the enquiry. Protection of prepared edges and surfaces is agreed for the project and transport conditions.
Order torispherical heads 3500 mm Type B
Germes-Ural specialists will prepare a quotation and confirm the material, thickness and geometry requirements for your project.
This card describes diameter 3500 mm Type B. All sizes for this configuration and Other head types in 3500 mm.