Description
Product Detail
Tantalum threaded flanges are internally threaded flanges used to connect threaded pipe or fittings without welding, making them suitable for highly corrosive media, small-bore piping and installations where hot work must be avoided. Tantalum offers outstanding resistance to strong acids and exceptional performance in demanding chemical, pharmaceutical, semiconductor and specialty processing systems. These flanges are commonly produced with raised face or flat face sealing surfaces for compact, leak-resistant connections.
SASA FLANGE supplies tantalum threaded flanges in standard and custom dimensions according to ASME B16.5 and project requirements. Each order can be supported with chemical analysis, mechanical testing, dimensional inspection, PMI testing, EN 10204 3.1 certificate and full heat number traceability. Customized drilling, facing, special thread forms and non-standard sizes are available for OEM and EPC applications.
- ✓Product Name: Tantalum Threaded Flanges
- ✓Material Grade: ASTM B365 R05200, R05400, Ta-2.5W
- ✓Product Type: Threaded / Screwed Pipe Flanges
- ✓Main Feature: Excellent resistance to strong acids with weld-free threaded installation
- ✓Applications: Acid processing, pharmaceutical plants, semiconductor lines, chlor-alkali systems, specialty chemical service
Product Parameters
| Product Name | Tantalum Threaded Flanges |
| Material Grade | ASTM B365 R05200, ASTM B365 R05400, Ta-2.5W, customer-specified tantalum grades |
| Material Type | Pure tantalum and tantalum alloy |
| Product Form | Forged, machined from billet, or plate cut and CNC machined for threaded flange configuration |
| Size Range | DN15 – DN150 (1/2 inch – 6 inch) |
| Pressure Class | Class 150 – 1500 / PN10 – PN100 |
| Sealing Face | RF, FF, Tongue and Groove on request |
| Surface Treatment | Machined, pickled, degreased, cleaned for high-purity service, protected with non-contaminating packing |
| Standard | ASME B16.5, EN 1092-1, DIN, JIS, GB 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 following chemical composition is for reference for common pure tantalum grades used in threaded flanges. Actual chemistry depends on the selected ASTM grade, material form and project specification. Final composition shall comply with the applicable standard, purchase order and mill test certificate issued for the supplied heat number.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Content % | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.02 | Ta balance; Nb ≤0.10, O ≤0.015, N ≤0.01, H ≤0.0015 |
Mechanical Properties
Mechanical properties of tantalum threaded flanges vary according to grade, material condition, processing route and section thickness. The values below are typical reference figures for annealed tantalum materials used for machining flanges. Final test results shall be confirmed by the applicable material specification, manufacturing process and certified inspection documents.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| ASTM B365 R05200 | 207 MPa | 138 MPa | 25% min | 90 HB | 16.6 g/cm3 |
| Ta-2.5W | 310 MPa | 220 MPa | 18% min | 110 HB | 16.7 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF | R05200 / R05400 | Stock / Production |
| DN65 – DN100 | Class 150 – 900 | RF / FF | R05200 / Ta-2.5W | Production |
| DN125 – DN150 | Class 150 – 1500 | RF / FF | R05200 / Ta-2.5W | Production |
| Special non-standard sizes | Project specific | RF / FF / TG | Pure tantalum or alloy | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME Threaded Flange | Internally threaded flange manufactured mainly to ASME B16.5 with NPT thread | Small-bore corrosive process piping in refinery, chemical and pilot plants |
| EN Threaded Flange | Threaded flange produced to EN 1092-1 dimensions or customer project standard | European process systems and skid packages requiring metric compliance |
| Raised Face Threaded Flange | Threaded flange with raised gasket seating area for improved sealing under moderate to high pressure | Acid transfer lines, dosing systems and high-purity process loops |
| Flat Face Threaded Flange | Threaded flange with full flat sealing face used with full-face gaskets | Glass-lined equipment connections, low-stress assemblies and lined piping systems |
Equivalent Standards and International Names
Threaded flange dimensions can be supplied to major international flange standards, while the tantalum material itself is usually manufactured to ASTM or equivalent tantalum material specifications. Equivalent naming may vary by project and region, so SASA FLANGE confirms both dimensional standard and material grade before production to ensure interchangeability and documentation compliance.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | ASTM B365 R05200 / R05400 tantalum threaded flange |
| Europe | EN 1092-1 | Tantalum flange to EN dimensions with ASTM B365 tantalum material |
| Germany | DIN 2527 / 2566 | Tantalum flange to DIN dimensions, material equivalent to ASTM B365 tantalum |
| Japan | JIS B2220 | Tantalum flange to JIS drilling with ASTM B365 tantalum grade |
| China | GB/T 9119 | Tantalum flange to GB dimensions with industrial pure tantalum material |
Production Process Flow
SASA FLANGE controls each manufacturing stage for tantalum threaded flanges, from certified raw material selection to precision thread machining and final inspection. Process stability is especially important for tantalum because contamination, dimensional error and poor surface condition can affect corrosion performance and sealing reliability.
- 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 tantalum billets, forgings or plate with traceable heat number | Material certificate, chemistry verification and traceability |
| Forging | Hot forging or precision cutting to obtain near-net flange blank | Reduction ratio, contamination control and surface integrity |
| Heat Treatment | Stress relief or annealing according to material condition and machining requirement | Temperature and holding time control |
| Machining | Machine sealing face, bore, internal thread, hub and bolt holes | Dimensional accuracy, thread gauge and surface finish |
| Inspection | Final inspection before shipment | Dimension, surface, PMI, hydrostatic |
Product Inspection
1. Chemical Composition Inspection
Chemical composition inspection verifies that the tantalum raw material conforms to the specified ASTM grade and impurity limits. SASA FLANGE reviews mill data and can arrange laboratory analysis when required to confirm tantalum content and key residual elements. This helps ensure corrosion resistance, process compatibility and compliance with project documentation requirements.
2. Mechanical Properties Testing
Mechanical properties testing checks tensile strength, yield strength, elongation and hardness of the tantalum material condition used for flange machining. These tests confirm that the material has adequate ductility and strength for assembly and service. Test results are reviewed against the applicable specification and can be included in the material certification package.
3. Dimensional Inspection
Dimensional inspection covers outside diameter, thickness, bore, hub dimensions, bolt hole circle, bolt hole size, sealing face profile and thread accuracy. For threaded flanges, special attention is paid to thread type and fit such as NPT or BSP. This inspection ensures interchangeability with mating components and reliable field installation.
4. PMI Testing and Hydrostatic Testing
PMI testing is used to confirm the supplied flange material matches the ordered tantalum grade and maintain positive identification through production. Hydrostatic testing can be arranged as part of assembled system verification or project-specific inspection. SASA FLANGE provides EN 10204 3.1 certificate, inspection reports and traceability records with 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
- ✓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
Tantalum threaded flanges are selected for severe corrosion service, especially where strong acid resistance and contamination control are critical. They are mainly used in small-bore and instrument connections where threaded assembly offers maintenance convenience and avoids welding. Typical industries include fine chemicals, pharmaceutical processing, high-purity systems and selected offshore chemical handling units.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Chemical injection skids, acid dosing lines, analyzer systems | Provides strong corrosion resistance in aggressive chemical streams and allows weld-free maintenance |
| Chemical Processing | Sulfuric acid, nitric acid and specialty acid transfer systems | Tantalum offers exceptional corrosion resistance where stainless steel and nickel alloys may be insufficient |
| Power Generation | Flue gas treatment chemical lines, laboratory and dosing connections | Suitable for corrosive reagent service and compact threaded assembly in auxiliary systems |
| Water Treatment | High-purity chemical dosing, specialty oxidation reagent lines | Used where contamination control and resistance to aggressive treatment chemicals are required |
| Marine and Offshore | Offshore chemical modules, skid-mounted corrosive service piping | Threaded design simplifies installation in compact spaces while tantalum resists highly corrosive media |
Why Choose SASA FLANGE?
- ✓Professional manufacturer of Threaded 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 tantalum threaded flange?
A: A tantalum threaded flange is a screwed flange with an internal pipe thread used to connect threaded pipe or equipment without welding. It is mainly chosen for highly corrosive service, especially in small-bore process lines. The threaded design simplifies installation and maintenance while tantalum provides excellent resistance to many strong acids and high-purity media.
Q: What materials are available for tantalum threaded flanges?
A: SASA FLANGE can supply tantalum threaded flanges in ASTM B365 R05200 pure tantalum, R05400 and tantalum-tungsten alloy such as Ta-2.5W depending on application requirements. Material selection is based on corrosion conditions, pressure, temperature and fabrication needs. We can also produce to customer-specified tantalum grades with full certification and traceability.
Q: What pressure class is supported?
A: Tantalum threaded flanges are commonly supplied in ASME Class 150, 300, 600, 900 and up to 1500 for small sizes, depending on flange design, dimensions and project conditions. Metric PN ratings such as PN10 to PN100 can also be offered. Final rating should always be confirmed according to the selected dimensional standard, temperature and service requirements.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can manufacture custom tantalum threaded flanges according to drawings or project specifications, including special drilling, non-standard outside diameter, custom thickness, raised face or flat face configuration and specific thread types such as NPT, BSPT or BSPP. We also support matched components for skid systems, OEM equipment and corrosion-service piping packages.
Q: What certificate is provided?
A: SASA FLANGE supplies EN 10204 3.1 material certificate with heat number traceability for tantalum threaded flanges. Depending on order requirements, the documentation package may include mill test certificate, chemical analysis, mechanical test results, dimensional inspection report and PMI records. Hydrostatic testing or third-party inspection can also be arranged according to the purchase order.
Contact Us
If you are looking for tantalum threaded 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
