Description
Product Detail
Titanium blind flanges are non-bored flanges designed to seal the end of a pipeline, valve connection or vessel opening. Compared with carbon steel and many stainless alloys, titanium offers outstanding corrosion resistance in seawater, wet chlorine, oxidizing acids and chloride-containing media, while also providing high strength-to-weight ratio and long service life. These blind flanges are widely used in offshore platforms, desalination plants, chemical process units, pulp and paper systems and power generation equipment.
SASA FLANGE supplies titanium blind flanges in standard and custom dimensions with precision machining for RF, FF and RTJ sealing faces. Each order can be supported by chemical analysis, mechanical testing, dimensional inspection, PMI testing, EN 10204 3.1 certificate and full heat number traceability to meet strict project and end-user documentation requirements.
- ✓Product Name: Titanium Blind Flanges
- ✓Material Grade: ASTM B381 Gr.2, Gr.5, Gr.7, Gr.12
- ✓Product Type: Forged and machined blind flanges
- ✓Main Feature: Excellent corrosion resistance, light weight, reliable end closure
- ✓Applications: Chemical processing, seawater systems, offshore, power plants, desalination and marine piping
Product Parameters
| Product Name | Titanium Blind Flanges |
| Material Grade | ASTM B381 Grade 2, Grade 5, Grade 7, Grade 12 |
| Material Type | Commercially pure titanium and titanium alloy forgings |
| Product Form | Forged, plate cut and CNC machined blind flange |
| Size Range | DN15 – DN1500 (1/2 inch – 60 inch) |
| Pressure Class | Class 150 – 2500 / PN10 – PN100 |
| Sealing Face | RF, FF, RTJ, TG, MFM |
| Surface Treatment | Pickling, passivation, machined finish, glass bead cleaning, protective wrapping |
| Standard | ASME B16.5, ASME B16.47, 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 a general reference for common titanium flange grades. Actual composition depends on the selected ASTM grade, heat and product form. Final chemistry shall comply with the applicable material standard and the values stated on the mill test certificate supplied with the order.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| ASTM B381 Gr.2 | 0.08 max | 0.10 max | 0.10 max | 0.03 max | 0.03 max | – | – | – | Fe 0.30 max, O 0.25 max, N 0.03 max, H 0.015 max, Ti balance |
| ASTM B381 Gr.5 | 0.08 max | 0.10 max | 0.10 max | 0.03 max | 0.03 max | – | – | – | Al 5.5-6.75, V 3.5-4.5, Fe 0.40 max, O 0.20 max, Ti balance |
| ASTM B381 Gr.7 | 0.08 max | 0.10 max | 0.10 max | 0.03 max | 0.03 max | – | – | – | Pd 0.12-0.25, Fe 0.30 max, O 0.25 max, Ti balance |
Mechanical Properties
Mechanical properties shown here are typical minimum values for widely used titanium flange grades. Actual results may vary with grade, forging reduction, heat treatment condition and section thickness. Certified test values are provided on request according to the applicable ASTM material specification and inspection requirements.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| ASTM B381 Gr.2 | 345 MPa min | 275 MPa min | 20% min | 160 HB max | 4.51 g/cm3 |
| ASTM B381 Gr.5 | 895 MPa min | 828 MPa min | 10% min | 349 HB max | 4.43 g/cm3 |
| ASTM B381 Gr.7 | 345 MPa min | 275 MPa min | 20% min | 160 HB max | 4.51 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF | Gr.2 / Gr.5 | Stock / Production |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | Gr.2 / Gr.7 / Gr.5 | Stock / Production |
| DN350 – DN600 | Class 150 – 2500 | RF / RTJ | Gr.2 / Gr.5 / Gr.12 | Production |
| DN700 – DN1500 | Class 150 – 900 | RF | Gr.2 / Gr.7 | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME B16.5 Blind Flange | Standard blind flange for NPS 1/2 to 24 with imperial drilling and pressure classes | Oil and gas, process piping, valves and pressure vessel nozzles |
| ASME B16.47 Blind Flange | Large diameter blind flange for NPS 26 to 60 in Series A or Series B | Large pipelines, water intake lines, offshore and plant headers |
| EN 1092-1 Type 05 | European standard blind flange with PN drilling and metric dimensions | Chemical plants, water treatment and European project requirements |
| JIS / DIN / GB Blind Flange | Regional blind flange designs with local bolt patterns and pressure ratings | Replacement parts, export projects and mixed standard piping systems |
Equivalent Standards and International Names
Titanium blind flanges can be produced to major international dimensional standards, while the titanium material grade is selected separately according to ASTM or equivalent specifications. Buyers should confirm both flange dimension standard and titanium grade when ordering for replacement or project use.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | ASTM B381 Gr.2, Gr.5, Gr.7 |
| Europe | EN 1092-1 | Titanium Grade 2 / Grade 5 to ASTM material basis |
| Germany | DIN 2527 / 2566 | Titanium Grade 2 or titanium alloy blind flanges |
| Japan | JIS B2220 | JIS drilling with ASTM B381 Gr.2 / Gr.5 titanium |
| China | GB/T 9119 | TA2, TC4 or equivalent ASTM B381 grades |
Production Process Flow
Titanium blind flanges require strict material and machining control because titanium is reactive at high temperature and demands careful processing. SASA FLANGE manages each step from raw material selection to final inspection to ensure dimensional accuracy, clean surface condition and dependable service performance.
- 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 or plate cutting to achieve required blank shape | Forging temperature and reduction ratio |
| Heat Treatment | Stress relieving, annealing or solution treatment as required by grade | 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 composition inspection verifies that the titanium forging or plate conforms to the specified grade such as Gr.2, Gr.5 or Gr.7. Raw material certificates are reviewed and, when required, laboratory analysis is performed to confirm alloying elements and impurity limits before machining and final release.
2. Mechanical Properties Testing
Mechanical testing is carried out according to the relevant ASTM material standard to confirm tensile strength, yield strength, elongation and hardness. This ensures the titanium blind flange has the required strength and ductility for pressure containment, bolting loads and service reliability in demanding industrial systems.
3. Dimensional Inspection
Dimensional inspection includes outside diameter, thickness, bolt circle, hole quantity, hole diameter, facing height and flange flatness. Sealing faces such as RF, FF or RTJ are checked carefully to ensure proper gasket seating, interchangeability with mating flanges and compliance with ASME, EN, DIN, JIS or GB standards.
4. PMI Testing and Hydrostatic Testing
PMI testing is used to confirm the supplied flange material matches the ordered titanium grade and to prevent material mix-up. Hydrostatic testing can be arranged when required by project specification. SASA FLANGE also provides EN 10204 3.1 certificate, inspection records and traceable heat numbers for documentation packages.
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
- ✓Anti-rust Oil Coating + Waterproof Paper: Used for ocean freight protection
- ✓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 reliable line closure must be combined with excellent resistance to seawater, chlorides, oxidizing chemicals and low-maintenance service conditions. They are widely used in projects requiring long operating life, reduced contamination risk and lower lifecycle cost compared with conventional metallic materials.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Offshore topside piping, seawater cooling lines, produced water systems | Titanium resists seawater corrosion and offers long service life in aggressive offshore conditions |
| Chemical Processing | Chlor-alkali units, acid handling systems, reactor and vessel nozzles | Excellent corrosion resistance in oxidizing and chloride-bearing media reduces maintenance |
| Power Generation | Condenser systems, flue gas treatment lines, cooling water circuits | Light weight and high corrosion resistance improve reliability in wet and corrosive environments |
| Water Treatment | Desalination plants, brine circulation, reverse osmosis skids | Performs well in seawater and high-salinity service with minimal contamination |
| Marine and Offshore | Shipboard seawater piping, ballast lines, offshore modules and firewater systems | Strong corrosion resistance and favorable strength-to-weight ratio support durable marine service |
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 center bore, used to close the end of a pipeline, valve outlet or vessel nozzle. It allows future access for inspection or expansion while providing strong pressure containment. Titanium blind flanges are especially suitable for corrosive media, seawater and chloride-rich services.
Q: What materials are available for titanium blind flanges?
A: SASA FLANGE commonly supplies titanium blind flanges in ASTM B381 Grade 2, Grade 5, Grade 7 and Grade 12. Grade 2 is widely used for corrosion resistance, Grade 5 offers higher strength, and Grade 7 provides enhanced corrosion resistance in reducing acid environments. Other titanium grades can be produced on request.
Q: What pressure class is supported?
A: Titanium blind flanges can be supplied in ASME Class 150, 300, 400, 600, 900, 1500 and 2500, as well as PN10 to PN100 depending on the applicable dimensional standard. The actual achievable size and pressure combination depends on the selected standard, material grade, flange dimensions and project specification.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can manufacture custom titanium blind flanges according to customer drawings or project data sheets, including non-standard outside diameters, thickness, bolt drilling, RTJ grooves and special facing requirements. We also support custom material grades, large diameters, matching drilling patterns and special marking or documentation needs.
Q: What certificate is provided?
A: Titanium blind flanges can be supplied with EN 10204 3.1 material certificate, mill test certificate, dimensional inspection report and PMI records. Mechanical test results and chemical analysis are available according to the grade specification. Hydrostatic testing or third-party inspection can also be arranged when required by project or end-user standards.
Contact Us
If you are looking for titanium flanges 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
