Description
Product Detail
A titanium blind flange is a flange without a center bore, designed to blank off the end of pipelines, valves, pumps, and pressure vessel nozzles. Compared with carbon steel and stainless steel alternatives, titanium blind flanges provide superior resistance to seawater, chlorides, oxidizing media and many aggressive chemical solutions, while also reducing system weight. They are widely used in offshore platforms, desalination units, chlor-alkali plants, heat exchangers, pulp and paper lines, and high-purity process systems.
SASA FLANGE supplies titanium blind flanges in standard and custom dimensions to ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS and GB standards. Each flange can be provided with chemical analysis, mechanical testing, dimensional inspection, PMI testing, EN 10204 3.1 certificate and full heat number traceability. Custom drilling, facing type, thickness and non-standard pressure ratings are available on request.
- ✓Product Name: Titanium Blind Flange
- ✓Material Grade: ASTM B381 F2 / F7 / F12, ASTM B265 Gr.1 / Gr.2
- ✓Product Type: Blind Flange / Blank Flange
- ✓Main Feature: Excellent corrosion resistance, light weight, strong sealing reliability
- ✓Applications: Chemical processing, seawater service, offshore, desalination, power and marine piping
Product Parameters
| Product Name | Titanium Blind Flange |
| Material Grade | ASTM B381 F1, F2, F7, F12; ASTM B265 Gr.1, Gr.2 |
| Material Type | Titanium and titanium alloy |
| Product Form | Forged blind flange, plate machined blind flange |
| Size Range | DN15 – DN1500 (1/2 inch – 60 inch) |
| Pressure Class | Class 150 – 2500 / PN6 – PN100 |
| Sealing Face | RF, FF, RTJ, TG, MFM |
| Surface Treatment | Pickled, passivated, machined finish, glass bead blasted |
| Standard | ASME B16.5, ASME B16.47 Series A/B, EN 1092-1, DIN 2527, JIS B2220, GB/T 9119 or customer specification |
| Inspection | Chemical Analysis, Mechanical Test, PMI Test, Dimensional, Hydrostatic |
| Certificate | EN 10204 3.1 Material Certificate available |
| Processing Service | Cutting, CNC Machining, Custom Drilling, Custom Size Processing |
Chemical Composition
The chemical composition below is for reference for common titanium flange grades used in industrial service. Final composition depends on the selected ASTM material grade and shall comply with the applicable standard, approved specification and mill test certificate. For critical projects, SASA FLANGE can provide PMI verification and full traceability to the heat number.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Gr.2 Titanium Content % | 0.08 max | 0.15 max | 0.03 max | 0.03 max | 0.015 max | – | – | – | Fe 0.30 max, O 0.25 max, N 0.03 max, H 0.015 max, Ti balance |
Mechanical Properties
Mechanical properties of titanium blind flanges vary with grade, forging route, heat treatment condition and section thickness. The following values are typical minimum requirements for commonly specified titanium grades for flange applications. Exact values shall be confirmed by the corresponding material test report and project specification.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| ASTM B381 F2 | 345 MPa | 275 MPa | 20% min | 160HB max | 4.51 g/cm3 |
| ASTM B381 F12 | 483 MPa | 345 MPa | 18% min | 200HB max | 4.51 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF | Gr.2 Titanium | Stock / Production |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | Gr.2 / Gr.7 Titanium | Stock / Production |
| DN350 – DN600 | Class 150 – 2500 | RF / RTJ | Gr.2 / Gr.12 Titanium | Production |
| DN700 – DN1500 | Class 150 – 900 | RF | Gr.2 Titanium | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME Blind Flange | Solid flange manufactured to ASME B16.5 or B16.47 with raised face, flat face or ring joint facing | Oil and gas, petrochemical, offshore and power piping systems |
| EN Blind Flange | Blank flange produced to EN 1092-1 with PN rating and metric dimensions | European process plants, water treatment and industrial utility systems |
| DIN Blind Flange | Blind flange according to DIN 2527 with DIN drilling and pressure designations | Chemical plants, mechanical engineering and replacement projects |
| JIS / GB Blind Flange | Blind flange made to JIS B2220 or GB/T 9119 with regional drilling patterns and ratings | Asian industrial facilities, marine service and local standard projects |
Equivalent Standards and International Names
Titanium blind flanges can be supplied according to major international flange standards, while the base titanium material is selected from appropriate ASTM forging or plate grades. Equivalent designations may differ by region, but dimensional standards, drilling pattern and pressure rating can be matched to the required piping system and project code.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | ASTM B381 F2, F7, F12 titanium blind flange |
| Europe | EN 1092-1 | Titanium blind flange in Gr.2 / Gr.7 to project material specification |
| Germany | DIN 2527 / 2566 | Titanium blind flange equivalent to ASTM Gr.2 or Gr.12 |
| Japan | JIS B2220 | Titanium blind flange in commercially pure titanium or corrosion resistant alloy grade |
| China | GB/T 9119 | TA1 / TA2 equivalent or ASTM B381 F1 / F2 on request |
Production Process Flow
Titanium blind flange manufacturing requires strict control of raw material quality, forging condition, machining accuracy and contamination prevention. SASA FLANGE maintains process control from billet or plate selection through final inspection and packing to ensure dimensional accuracy, sealing performance and reliable traceability.
- 1. Raw Material Selection
- 2. Forging / Cutting
- 3. Heat Treatment
- 4. Rough Machining
- 5. Finish Machining
- 6. Drilling
- 7. Surface Treatment
- 8. Inspection
- 9. Marking
- 10. Packing
- 11. Delivery
| Process Step | Description | Quality Control Point |
|---|---|---|
| Raw Material | Select certified titanium forging billets or plates | Material certificate and traceability |
| Forging | Hot forging to achieve required shape | Forging temperature and reduction ratio |
| Heat Treatment | Stress relieving or annealing where applicable | Temperature and holding time control |
| Machining | Sealing face, bolt holes, dimensions | Dimensional accuracy and surface finish |
| Inspection | Final inspection before shipment | Dimension, surface, PMI, hydrostatic |
Product Inspection
1. Chemical Composition Inspection
Chemical analysis is performed to verify the titanium grade meets ASTM requirements for elements such as iron, oxygen, nitrogen, hydrogen and residual impurities. Incoming raw material certificates are checked against specification limits, and additional laboratory analysis can be arranged for critical applications to confirm compliance before production and shipment.
2. Mechanical Properties Testing
Mechanical testing confirms that the flange material satisfies required tensile strength, yield strength, elongation and hardness values for the selected grade. Test records are reviewed against the applicable ASTM standard and project specification to ensure the titanium blind flange has adequate strength, ductility and service reliability under operating conditions.
3. Dimensional Inspection
Each titanium blind flange is inspected for outside diameter, thickness, bolt circle, bolt hole quantity, hole diameter, facing dimensions and overall tolerances. Sealing face finish and concentricity are also checked to ensure correct assembly with mating flanges, gasket seating integrity and compliance with ASME, EN, DIN, JIS or GB dimensional standards.
4. PMI Testing and Hydrostatic Testing
PMI testing is available to verify the supplied flange material is the specified titanium grade and to avoid mixed material risk. Hydrostatic testing is conducted when required by project scope or assembly conditions. SASA FLANGE supplies EN 10204 3.1 certificate, inspection records and traceability documents with each qualified shipment.
Product Packaging
- ✓Wooden Case Packaging: Suitable for high-pressure and large-diameter products
- ✓Pallet Packing with Shrink Wrap: Suitable for batch shipments and standard sizes
- ✓Waterproof Paper + Foam Separation: Used for titanium surface protection during ocean freight
- ✓Individual Plastic Bag + Carton: Used for small fittings and threaded products
- ✓Clear Marking: Grade, size, pressure class, heat number and PO number
Applications
Titanium blind flanges are selected where conventional steel flanges are vulnerable to chloride attack, seawater corrosion or aggressive process media. Their excellent corrosion resistance, high strength-to-weight ratio and long service life make them suitable for demanding industrial systems requiring secure line blanking, maintenance isolation and dependable sealing performance.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Offshore topside piping, produced water lines, seawater cooling systems, injection systems | Resists seawater corrosion, reduces maintenance and provides reliable end isolation |
| Chemical Processing | Chlor-alkali units, acid transfer lines, reactor nozzles, corrosive media piping | Excellent resistance to many oxidizing chemicals and long service life |
| Power Generation | Condenser systems, flue gas desulfurization units, cooling water pipelines | Handles corrosive condensate and wet process conditions with low contamination risk |
| Water Treatment | Desalination plants, reverse osmosis skids, brine piping, seawater intake systems | Outstanding chloride and seawater resistance with low lifecycle cost |
| Marine and Offshore | Shipboard cooling water systems, offshore modules, ballast and firewater piping | Light weight, high corrosion resistance and dependable flange sealing in marine environments |
Why Choose SASA FLANGE?
- ✓Professional manufacturer of Blind Flanges for global industrial projects
- ✓Customized size, pressure class and material grade according to drawings
- ✓Full standard support: ASME, EN, DIN, JIS, GB, GOST and customer specifications
- ✓Material traceability with heat number control and EN 10204 3.1 material certificate
- ✓Chemical analysis, mechanical testing, PMI testing, hydrostatic and dimensional inspection
- ✓Stock availability for standard items, lead time 3-7 days; custom production 15-30 days
- ✓Export-grade packaging for sea, air and land transportation
- ✓15+ years experience supplying 50+ countries worldwide
FAQ
Q: What is a titanium blind flange?
A: A titanium blind flange is a solid flange without a bore used to close or isolate the end of a pipeline, valve, pump or vessel nozzle. It is installed with bolts and a gasket against a mating flange to provide a secure pressure boundary. Titanium versions are chosen when corrosion resistance, low weight and long service life are critical.
Q: What materials are available for titanium blind flanges?
A: SASA FLANGE commonly supplies titanium blind flanges in ASTM B381 F1, F2, F7 and F12 forging grades, as well as machined plate blinds from ASTM B265 Gr.1 and Gr.2 where applicable. Gr.2 is widely used for seawater and general corrosion service, while Gr.7 and Gr.12 are selected for enhanced corrosion or higher strength requirements.
Q: What pressure class is supported?
A: Titanium blind flanges can be produced in ASME Class 150, 300, 600, 900, 1500 and 2500, as well as EN and DIN pressure ratings such as PN6, PN10, PN16, PN25, PN40, PN64 and PN100. The available pressure class depends on size, standard, material grade and project design requirements.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE supplies standard and non-standard titanium blind flanges according to customer drawings or project data sheets. We can customize outside diameter, thickness, drilling pattern, bolt holes, sealing face type, surface finish, marking and material grade. Special dimensions for skid packages, replacement systems and offshore projects are available on request.
Q: What certificate is provided?
A: SASA FLANGE provides EN 10204 3.1 material certificate with heat number traceability for titanium blind flanges. Supporting documents can include mill test certificate, chemical composition report, mechanical test results, dimensional inspection report and PMI records. Hydrostatic testing can also be provided when specified by the order or project inspection requirement.
Contact Us
If you are looking for titanium blind flange or related custom flange products, please contact SASA FLANGE with your required size, pressure class, material grade, standard, surface treatment, quantity and inspection requirements. Our team will provide professional technical solutions and competitive quotation within 24 hours.
- 📧 Email: sales@sasaflange.com
- 📱 WhatsApp: +86 13764965049
- ☎️ Tel: +86 21 52236361
- 🌐 Website: www.sasaflange.com
