Titanium Pressure Vessel Heads
Titanium ellipsoidal, torispherical and hemispherical vessel heads supplied by grade, diameter, thickness, straight flange, forming route, weld preparation and inspection plan.
- Material
- Titanium Grades 2, 7 or 12; other grades by review
- Forms
- 2:1 ellipsoidal, torispherical or hemispherical
- Dimensions
- Inside/outside diameter, crown, knuckle, thickness and straight flange
- Documents
- MTC, forming records, dimensions and agreed NDT
Product Detail
Product Introduction
Titanium pressure-vessel heads close process vessels, columns, reactors and heat-exchanger shells where corrosion resistance and pressure-boundary integrity are required. Each head must be engineered from the applicable code calculation and approved drawing, including material grade, formed diameter, nominal and minimum thickness after forming, crown and knuckle radii, straight flange, weld preparation, heat treatment, surface condition and inspection.
Product Specifications
| Product | Titanium Pressure Vessel Heads | Grade | Titanium Grade 2, Grade 7 or Grade 12 by pressure design |
|---|---|---|---|
| Standard | Material may be ordered to ASTM B265 / ASME SB265 for plate when expressly invoked. Finished-head design and fabrication are governed by the approved pressure-vessel code, drawing and purchase specification; common references can include ASME Section VIII or EN 13445, but code compliance is not claimed without the complete design, welding, examination and certification scope. | Size & Form | Ellipsoidal, torispherical or hemispherical head; diameter, crown/knuckle radii, nominal/minimum thickness, straight flange and weld preparation by approved drawing |
| Tolerance | Code- and drawing-defined profile, diameter, thickness, roundness, flange and weld-edge tolerances | Supply Condition | Cold or hot formed as approved; pickled, ground or order-specific surface; weld-ready edge and protected shipping |
| Inspection | Available controls include MTC and heat identity, incoming plate thickness, formed profile templates, inside/outside diameter, crown and knuckle geometry, straight flange, minimum thickness mapping, visual and surface inspection, PT, UT where applicable, weld-preparation checks and third-party inspection by agreement. | Documents | MTC, heat/lot traceability and agreed inspection reports |
Send the complete material RFQ
Include grade, specification revision, dimensions, tolerance, quantity, condition, tests and destination.
Chemical Composition
Weight percent; maximum unless a range is shown. Titanium is the balance. The ordered specification and grade control.
| Grade / UNS | Principal Alloying Elements | Fe max | O max | C max | N max | H max | Ti |
|---|---|---|---|---|---|---|---|
| Grade 2 / R50400 | — | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 7 / R52400 | Pd 0.12–0.25 | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 12 / R53400 | Mo 0.20–0.40; Ni 0.60–0.90 | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
Mechanical Properties – Annealed Material Reference
| Grade | Ultimate Tensile Strength min | 0.2% Yield Strength min | Elongation min |
|---|---|---|---|
| Grade 2 | 345 MPa | 275 MPa | 20% |
| Grade 7 | 345 MPa | 275 MPa | 20% |
| Grade 12 | 483 MPa | 345 MPa | 18% |
Representative minima only. Product form, section size, heat treatment and the invoked specification determine the certified acceptance values.
Typical Physical Properties
| Grade | Density | Elastic Modulus | Thermal Expansion |
|---|---|---|---|
| Grade 2 | 4.51 g/cm³ | Approx. 105 GPa | Approx. 8.6 µm/m·K |
| Grade 7 | Approx. 4.51 g/cm³ | Approx. 105 GPa | Approx. 8.6 µm/m·K |
| Grade 12 | Approx. 4.54 g/cm³ | Approx. 103 GPa | Approx. 8.6 µm/m·K |
Typical engineering references, not inspection acceptance limits.
Certificates & Inspection Records
Services We Can Provide
Product Packaging
Blocks and forgings are protected at machined surfaces, secured on pallets or in export cases, and identified by grade, heat, dimensions and quantity.
Application Scenarios
Chemical-process reactors, columns and storage vessels
Material grade, dimensions, condition and inspection must be matched to the application requirements.
Desalination and seawater process equipment
Material grade, dimensions, condition and inspection must be matched to the application requirements.
Heat exchangers, pressure equipment and corrosive-service systems
Material grade, dimensions, condition and inspection must be matched to the application requirements.
FAQ
Which head type is most commonly requested?
A 2:1 ellipsoidal head is common, but head type must come from the approved pressure-vessel design and available vessel envelope.
Why specify minimum thickness after forming?
Forming can thin local areas, especially near the knuckle. The finished head must retain the design-required minimum thickness.
Can SAKY ALLOY certify an ASME vessel head by material alone?
No. Material supply, forming, welding, NDT, code calculations and authorized inspection form the complete compliance scope.
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