Description
Product Detail
A tantalum socket weld flange is a forged or machined flange with a socket bore designed for insertion and fillet welding of small-diameter pipe. It is selected where outstanding corrosion resistance is required, especially in hot concentrated acids, chlorides and high-purity process systems. The socket weld design provides secure alignment, reduced leakage risk and strong performance in compact piping layouts used in chemical processing, pharmaceutical plants, specialty acids and offshore chemical injection lines.
SASA FLANGE supplies tantalum socket weld flanges in standard and customized dimensions with strict quality control. Each order can be supported by chemical analysis, mechanical testing, dimensional inspection, PMI testing, EN 10204 3.1 certificate and full heat number traceability. Custom machining for facing type, drilling pattern, bore size and special project requirements is available.
- ✓Product Name: Tantalum Socket Weld Flange
- ✓Material Grade: R05200, R05400, R05252
- ✓Product Type: Socket Weld Flange
- ✓Main Feature: Excellent corrosion resistance in aggressive acid and high-purity service
- ✓Applications: Chemical processing, pharmaceutical systems, acid plants, power, marine and specialty piping
Product Parameters
| Product Name | Tantalum Socket Weld Flange |
| Material Grade | ASTM B521 / ASME SB521 R05200, R05400, R05252 |
| Material Type | Tantalum and tantalum alloy |
| Product Form | Forged and CNC machined socket weld flange |
| Size Range | DN15 – DN100 (1/2 inch – 4 inch) |
| Pressure Class | Class 150 – 1500 / PN10 – PN100 |
| Sealing Face | RF, FF, RTJ, TG, MFM |
| Surface Treatment | As-machined, pickled, cleaned, passivated, degreased on request |
| Standard | ASME B16.5, EN 1092-1, DIN, 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 following chemical composition is for general reference for tantalum flange materials. Actual chemistry depends on the selected grade, melting route and applicable ASTM or ASME specification. Final delivered composition shall conform to the relevant standard and be confirmed by mill test certificate, supplementary inspection records and project-specific quality requirements.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| Content % | 0.01 max | 0.01 max | 0.01 max | 0.005 max | 0.005 max | – | – | – | Ta+Nb 99.9 min; O 0.015 max; N 0.01 max; H 0.0015 max |
Mechanical Properties
Mechanical properties of tantalum socket weld flanges vary with grade, manufacturing process, annealed condition and final section thickness. The values below are typical reference values for common tantalum grades used for corrosion-resistant flange production. Final test results are subject to applicable material standard, heat treatment condition and actual mill or forging test certification.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| R05200 | 207 MPa min | 138 MPa min | 25% min | 90 HB max | 16.6 g/cm3 |
| R05400 | 207 MPa min | 138 MPa min | 20% min | 100 HB max | 16.6 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN25 | Class 150 – 600 | RF | R05200 / R05400 | Stock / Production |
| DN32 – DN50 | Class 150 – 900 | RF / RTJ | R05200 / R05252 | Stock / Production |
| DN65 – DN80 | Class 300 – 1500 | RF / RTJ | R05200 / R05400 | Production |
| DN100 | Class 150 – 1500 | RF / RTJ | R05200 / R05252 | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| Socket Weld Flange | Flange with socket bore for pipe insertion and fillet weld connection | Small-bore high-integrity corrosive service lines |
| Weld Neck Flange | Flange with tapered hub and butt-weld end for high stress service | High temperature and cyclic loading process piping |
| Slip On Flange | Flange slipped over pipe and welded inside and outside | Low to medium pressure utility piping |
| Blind Flange | Solid flange used to terminate or isolate a piping end | Line blanking, inspection openings and future tie-ins |
Equivalent Standards and International Names
Socket weld flange dimensions are generally produced to international flange dimensional standards, while the tantalum material itself is supplied to ASTM or ASME material specifications. For non-ASME projects, SASA FLANGE can machine equivalent drilling and facing details according to EN, DIN, JIS and GB standards while maintaining traceable tantalum grade certification.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | Socket weld flange in SB521 R05200 / R05400 tantalum |
| Europe | EN 1092-1 | Custom machined tantalum flange to PN drilling using R05200 |
| Germany | DIN 2566 / DIN 2527 | Special drilled tantalum flange equivalent in R05200 or R05252 |
| Japan | JIS B2220 | JIS drilling pattern socket weld flange in tantalum grade R05400 |
| China | GB/T 9119 | GB flange dimensions with tantalum material per ASTM B521 |
Production Process Flow
Tantalum flange manufacturing requires strict control of raw material purity, machining cleanliness and dimensional precision. SASA FLANGE follows documented process control from certified material sourcing to final inspection to ensure corrosion resistance, weldability and project compliance.
- 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 forging billets or plates | Material certificate and traceability |
| Forging | Hot forging to achieve required shape | Forging temperature and reduction ratio |
| Heat Treatment | Vacuum annealing or stress relief as required | 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 is carried out to verify tantalum purity and impurity limits against ASTM or ASME material requirements. Key controlled elements include oxygen, nitrogen, hydrogen and metallic residuals that may influence corrosion behavior and fabrication performance. Test records are reviewed against the mill certificate to ensure the flange material matches the specified grade and project documentation.
2. Mechanical Properties Testing
Mechanical property testing confirms that the tantalum material used for flange production meets specified tensile strength, yield strength, elongation and hardness requirements. Depending on order specification, test samples are taken from the same heat or production lot. These tests help ensure adequate ductility, machining behavior and structural reliability for welded flange service in corrosive process systems.
3. Dimensional Inspection
Dimensional inspection covers outside diameter, flange thickness, bolt circle, bolt hole size, socket bore, socket depth, facing height and raised face finish. Each flange is checked against the applicable ASME, EN, DIN, JIS, GB or approved drawing requirement. Accurate dimensions are essential to ensure proper fit-up, gasket seating and reliable welding alignment during field installation.
4. PMI Testing and Hydrostatic Testing
PMI testing is performed to confirm the delivered flange material corresponds to the specified tantalum grade and to prevent material mix-up in critical service. When required by the order or project specification, hydrostatic testing is arranged on assembled components or related spool pieces. EN 10204 3.1 certificate, inspection reports and traceability records are supplied 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 socket weld flanges are typically selected for compact piping systems handling highly corrosive fluids where long service life and contamination resistance are critical. Their excellent chemical resistance makes them suitable for demanding environments across process industries, especially where stainless steel, nickel alloys or lined components may not provide sufficient performance.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Chemical injection skids, acid dosing lines, specialty sampling systems | Resists aggressive chemicals in small-bore high-integrity service |
| Chemical Processing | Sulfuric acid, hydrochloric acid, nitric acid and mixed acid piping systems | Exceptional corrosion resistance and long service life |
| Power Generation | FGD chemical systems, laboratory lines, specialty corrosion-resistant loops | Reliable sealing and resistance to aggressive treatment chemicals |
| Water Treatment | Dosing systems for concentrated reagents and ultrapure chemical lines | Low contamination risk and high resistance to corrosive media |
| Marine and Offshore | Offshore chemical modules, seawater-adjacent acid handling equipment | Compact design with strong corrosion resistance in harsh environments |
Why Choose SASA FLANGE?
- ✓Professional manufacturer of Socket Weld Flange 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 socket weld flange?
A: A tantalum socket weld flange is a small-bore flange designed with a recessed socket to receive pipe before fillet welding. It is used where compact installation, secure alignment and excellent corrosion resistance are required. This flange type is especially suitable for aggressive acid service, high-purity chemical systems and critical process lines where leak-tight performance is important.
Q: What materials are available for tantalum socket weld flanges?
A: SASA FLANGE commonly supplies tantalum socket weld flanges in commercially pure tantalum grades R05200 and R05400, as well as selected tantalum alloy grades such as R05252 based on project requirements. Material selection depends on corrosion media, fabrication requirements and operating conditions. We can also provide custom machining from certified tantalum forgings or plate-based blanks with full traceability.
Q: What pressure class is supported?
A: Tantalum socket weld flanges are typically supplied in ASME Class 150, 300, 600, 900 and 1500 for sizes from 1/2 inch to 4 inch. Equivalent PN ratings can be machined for EN or DIN projects where required. The actual pressure-temperature capability depends on flange dimensions, material condition, gasket selection and the applicable design code for the service.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can supply customized tantalum socket weld flanges with special bore size, socket depth, facing type, bolt hole drilling, non-standard thickness and project-specific dimensions. We also support ASME, EN, DIN, JIS and GB drilling patterns, as well as drawing-based manufacturing for skid packages, laboratory systems and corrosion-resistant process piping applications.
Q: What certificate is provided?
A: Standard documentation includes EN 10204 3.1 material certificate with heat number traceability. Depending on the order, we can also provide mill test certificate, chemical analysis report, mechanical test report, PMI report, dimensional inspection record and packing list. Hydrostatic or supplementary inspection documentation can be arranged when specified in the purchase order or project quality plan.
Contact Us
If you are looking for weld neck flange tantalum 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
