Duplex Flanges supplier Riyadh
Duplex Flanges supplier Riyadh offers high-quality stainless steel components designed to meet the demanding needs of the oil and gas, petrochemical, and marine industries. These flanges are manufactured from duplex stainless steel, known for its excellent corrosion resistance, high strength, and superior durability. The combination of austenitic and ferritic stainless steel phases in the material ensures enhanced resistance to stress corrosion cracking and pitting, making it ideal for harsh environments.
Our range includes various types of flanges such as weld neck, slip-on, blind, and threaded flanges, each designed to accommodate different piping system requirements. Precision-engineered to comply with international standards like ASTM A182 and ASME B16.5, these flanges feature tight dimensional tolerances and smooth surface finishes, ensuring secure and leak-proof connections in critical applications. The duplex grade often used is UNS S31803 or S32205, which provides excellent mechanical properties and longevity.
These stainless steel flanges are widely used in industries that handle corrosive fluids and high-pressure systems, including chemical processing plants, desalination facilities, and offshore platforms. Their robustness allows them to perform reliably under extreme temperature fluctuations and aggressive media, reducing maintenance costs and downtime. The versatility of these components makes them a preferred choice for engineers and procurement specialists aiming for long-term operational efficiency.
With a strong export readiness, the supplier in Riyadh ensures that all duplex flanges are packaged and shipped according to international export regulations and standards. This includes proper anti-corrosion treatment, secure crating, and comprehensive documentation such as mill test reports and certificates of compliance. Buyers can expect timely delivery and consistent quality, supported by a responsive supply chain tailored for global industrial clients.
Choosing a reputable supplier for duplex stainless steel flanges guarantees access to reliable products that enhance system integrity and safety. The combination of advanced metallurgy, precision manufacturing, and strategic location in Riyadh positions this supplier as a key partner for industrial buyers seeking durable and high-performance flange solutions for their critical infrastructure projects.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex Flanges supplier Riyadh Are Preferred by Global Buyers
- ✔ Factory Pricing: Direct manufacturer rates with bulk stock
- ✔ Certified Quality: ISO & 3rd-party tested, EN 10204 certified
- ✔ Export-Ready: Sea-worthy packaging for on-time delivery
- ✔ Fast RFQs: Quick quotes for custom sizes & quantities
- ✔ Traceability: 100% heat number tracking from raw material to finished product
Trusted by industries like oil & gas, petrochemicals, power, marine, and heavy engineering.
- Manufacturing Capacity: 500 MT / Month
- Export Experience: 15+ Years
- Countries Served: 50+
- Annual Export Volume: 5,500 MT
Table of Contents
- 1. What is Duplex Flanges supplier Riyadh
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex Flanges supplier Riyadh
- 4. Why Global Buyers Source from Ragnar Metals and Tubes
- 5. Features
- 6. Technical Overview
- 7. Specifications
- 8. Available Grades
- 9. Available Sizes
- 10. Chemical Properties
- 11. Mechanical Properties
- 12. Physical & Thermal Properties
- 13. Electrical Resistivity
- 14. Equivalent Grades
- 15. Manufacturing Process & Heat Treatment
- 16. Various Types
- 17. Applications & Uses
- 18. Industries We Serve
- 19. Latest Price List
- 20. MOQ & Payment Terms
- 21. Export Packaging & Shipping
- 22. Cities We Supply in India
- 23. Countries We Export Worldwide
- 24. Our Certifications
- 25. Quality Inspection & Testing
- 26. Our Other Product Types
- 27. People Also Search For
- 28. Frequently Asked Questions
- 29. About Ragnar Metals and Tubes
How to Choose the Right Duplex Flanges supplier Riyadh
India is home to hundreds of manufacturers ranging from small job shops to large ISO-certified exporters. International and domestic buyers typically evaluate manufacturers based on quality compliance, production capacity, export experience, and pricing transparency.
- Certification & international standards (ASME, ASTM, EN)
- Manufacturing capability vs trading activity
- Export documentation & inspection support
- Stock availability & lead time reliability
- Past supply experience in oil & gas, EPC & heavy industries
Comparison Factors Among Duplex Flanges supplier Riyadh
| Evaluation Factor | Small Local Suppliers | Trading Companies | ISO-Certified Manufacturers |
|---|---|---|---|
| Manufacturing Control | Limited | None | Full in-house / audited partners |
| International Standards | Basic | Depends on source | ASME / ASTM / EN |
| Inspection & MTCs | Limited | Inconsistent | EN 10204 3.1 / 3.2 |
| Export Experience | Low | Medium | 50+ countries |
| Risk for EPC Projects | High | Medium | Low |
International buyers typically prefer ISO-certified manufacturers for large-scale or critical applications due to better quality control, documentation, and lower project risk.
Why Global Buyers Choose Ragnar Metals and Tubes
Ragnar Metals and Tubes is a trusted ISO 9001:2015 certified manufacturer and global exporter of ferro alloys and metal products, supplying consistent, high-quality materials to customers across USA, UK, Europe, Middle East, Africa, and Asia-Pacific. Our focus on quality assurance, cost efficiency, and on-time delivery makes us a preferred sourcing partner for international buyers.
| Key Advantage | Buyer Benefit |
|---|---|
| ISO 9001:2015 Certified Manufacturing | Consistent quality with documented QA systems and process control |
| ASME / ASTM / EN Compliant Products | Globally accepted standards with EN 10204 3.1 / 3.2 MTCs |
| Lower Manufacturing & Sourcing Costs | Save up to 15–20% compared to European suppliers |
| Favorable Exchange Rate Advantage | Reduced landed cost for international importers |
| In-House Testing & Inspection Facilities | Strict chemical, mechanical & dimensional quality checks |
| Bulk Stock & High Production Capacity | Fast order fulfillment and stable supply for large projects |
| Custom Sizes & Drawing-Based Manufacturing | Products manufactured exactly to buyer specifications |
| Export-Grade Packaging & Global Logistics | Sea-worthy packing, palletization & worldwide shipping support |
| Faster Global Shipping Routes | Optimized logistics for Middle East, Africa & Southeast Asia |
| Technical & After-Sales Support | Project assistance, documentation & responsive RFQ handling |
| Trusted by Global Steel & EPC Companies | Proven export experience across 50+ countries |
Features of Duplex Flanges
- ✔ High corrosion resistance, suitable for harsh environments
- ✔ Excellent strength-to-weight ratio for lightweight applications
- ✔ Superior weldability for efficient installation
- ✔ Versatile applications across industries, including oil and gas
- ✔ Cost-effective solution compared to traditional stainless steels
- ✔ Available in various sizes and specifications to meet project needs
Technical Overview of Duplex Flanges
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex Steel Flanges | 22% Cr, 5% Ni, 3% Mo, Balance Fe | Used in high-pressure and high-temperature applications in oil and gas, chemical processing, and marine environments. | ASTM A182, ASTM A240, ASME B16.5 |
| Super Duplex Flanges | 25% Cr, 7% Ni, 4% Mo, Balance Fe | Ideal for applications requiring higher corrosion resistance and strength, commonly used in subsea and offshore environments. | ASTM A890, ASTM A928, ASME B16.47 |
| Duplex Forged Flanges | 22% Cr, 5% Ni, 3% Mo, Balance Fe | Suitable for a variety of industrial applications including piping systems and pressure vessels. | ASTM A105, ASTM A182, ASME B16.5 |
Specifications Table
| Material | Duplex Stainless Steel |
|---|---|
| Grades | UNS S31803, UNS S32205 |
| Standard | ASTM A182, ASME B16.5 |
| Size Range | 1/2" to 24" |
| Length | Custom lengths available as per requirements |
| Form | Blind, Slip-On, Weld Neck, Socket Weld |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2205 Flanges | 22% Cr, 5% Ni, 3% Mo | Oil and gas, chemical processing, marine applications |
| Duplex 2507 Flanges | 25% Cr, 7% Ni, 4% Mo | High chloride environments, seawater applications, pulp and paper |
| Duplex 321 Flanges | 18% Cr, 9% Ni, Ti | Aerospace, heat exchangers, oil refining |
| Duplex superaustenitic Flanges | 20% Cr, 25% Ni, 5% Mo | Power generation, chemical processing, desalination |
| Duplex S32205 Flanges | 22% Cr, 5% Ni, 3% Mo, N | Water treatment, petrochemical industries, structural applications |
Available Sizes of Duplex Flanges (MM)
| Size (MM) | Size (MM) |
|---|---|
| 15 | 20 |
| 25 | 32 |
| 40 | 50 |
| 65 | 80 |
| 100 | 125 |
| 150 | 200 |
| 250 | 300 |
| 350 | 400 |
| 450 | 500 |
| 600 | 800 |
Chemical Properties of Duplex Stainless Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.03 max |
| Manganese (Mn) | 1.0 max |
| Phosphorus (P) | 0.03 max |
| Sulfur (S) | 0.01 max |
| Silicon (Si) | 1.0 max |
| Chromium (Cr) | 18.0 - 28.0 |
| Nickel (Ni) | 4.5 - 8.0 |
| Molybdenum (Mo) | 3.0 - 5.0 |
Mechanical Properties of Duplex Flanges
| Property | Value |
|---|---|
| Tensile Strength | 620 - 850 MPa |
| Yield Strength | 450 - 600 MPa |
| Elongation | 25% minimum |
| Hardness | 250 - 300 HB |
| Impact Toughness | 27 J at -40°C |
Duplex Flanges – Physical & Thermal Properties
Density of Duplex Flanges
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.28 lb/in³ |
Melting Point of Duplex Flanges
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1400 - 1450 °C | 2552 - 2642 °F |
Specific Heat of Duplex Flanges
| Specific Heat of Duplex Flanges | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Annealed |
| 460 | 100 - 400 | Cold Worked |
| 420 | 400 - 800 | Heat Treated |
Electrical Resistivity of Duplex Stainless Steel Flanges
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.72 | 20 | As-Received Condition |
| 0.75 | 100 | |
| 0.78 | 200 | |
| 0.80 | 300 | |
| 0.82 | 400 | |
Equivalent of Duplex Flanges
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A240 | 1.4462 | S31803 |
| EN 10088-3 | X2CrNiMoN22-5-3 | S32205 |
Manufacturing Process & Heat Treatment of Duplex Flanges
Annealing
Annealing is a heat treatment process that involves heating the duplex steel flanges to a specific temperature, typically between 1000°C and 1100°C, followed by controlled cooling. This process alleviates internal stresses, improves ductility, and enhances the overall mechanical properties of the material, making it easier to machine and shape.
Forging
Forging is a manufacturing process where duplex steel is shaped by applying compressive forces, usually through hammering or pressing. This process enhances the material's strength and structural integrity by refining the grain structure. The forged duplex flanges are then subjected to further processing to achieve the desired dimensions and surface finish.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1020 - 1100 | Oil or Water | Increase hardness and strength |
| Tempering | 600 - 800 | Air | Reduce brittleness and improve toughness |
| Stress Relieving | 600 - 700 | Air | Alleviate residual stresses from machining |
The combination of these processes ensures that duplex flanges possess optimal mechanical properties, making them suitable for various industrial applications, including oil and gas, chemical processing, and marine environments.
Various Types
Duplex Steel Flanges
- Dimensions: 1/2" to 60"
- Condition: Hot Finished & Cold Finished
- Applications: Oil and Gas, Chemical Processing, Marine Engineering
Duplex S31803 Flanges
- Dimensions: 1" to 24"
- Condition: Annealed
- Applications: Pulp and Paper, Desalination Plants, Power Generation
Duplex S32205 Flanges
- Dimensions: 3/4" to 48"
- Condition: Forged
- Applications: Petrochemical, Wastewater Treatment, Construction
Duplex Blind Flanges
- Dimensions: 1" to 36"
- Condition: As Rolled
- Applications: Flange Connections, Isolation in Pipelines
Applications & Uses
- Oil & Gas Industry: Pipelines, process piping, and high-pressure fluid handling systems.
- Petrochemical & Refineries: Reactors, heat exchangers, and chemical processing units.
- Water Treatment Plants: Filtration systems, storage tanks, and corrosion-resistant piping.
- Pharmaceutical Industry: Hygienic piping, sanitary fittings, and cleanroom equipment.
- Food & Beverage: Processing lines, storage vessels, and contamination-free pipelines.
- Automobile & Engineering: Exhaust systems, structural parts, and precision components.
- Power & Energy Sector: Boilers, condensers, and turbine piping systems.
- Marine & Offshore: Shipbuilding, offshore platforms, and coastal infrastructure.
- Construction & Infrastructure: Structural frameworks, bridges, and industrial buildings.
Industries We Serve
Our stainless steel, alloy steel, and high-performance metal products are widely used across the following industries:
Latest Price List of Duplex Flanges
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex 2205 | 3 mm | $4.50 – $5.00 | ₹370 – ₹410 |
| Duplex 2205 | 6 mm | $4.80 – $5.30 | ₹400 – ₹440 |
| Duplex 2205 | 10 mm | $5.00 – $5.50 | ₹410 – ₹460 |
Note: Prices are indicative and may vary based on size, quantity, raw material cost, and delivery location. Contact us for the latest quotation for Duplex Flanges.
MOQ & Payment Terms
Minimum Order Quantity: 25–100 Kg depending on part size and grade.
Payment Terms: Depending On Grade and Quantity Size
Export Packaging & Shipping
- Seaworthy, fumigated wooden crates with waterproof inner lining
- Palletised packing with clear shipping marks and heat number identification
- Container stuffing supervision with loading photographs available on request
We Exported to 50+ Countries Worldwide
| Global Export Destinations | |||||
|---|---|---|---|---|---|
| United States | Canada | Mexico | United Kingdom | Germany | Netherlands |
| Italy | Spain | South Africa | Australia | India | Korea |
| United Arab Emirates | Saudi Arabia | Qatar | Kuwait | Oman | Bahrain |
| Singapore | Malaysia | Indonesia | Dubai | Riyadh | Dammam |
Our Certifications
We are a certified manufacturer and exporter, committed to strict quality control and international compliance standards. Below are our key certifications.
GST Registered
ISO 9001:2015
ISO 1002:2018
Udyam MSME Registration
Testing Process & Quality Assurance – Ragnar Metals & Tubes
At Ragnar Metals & Tubes, our testing process ensures the safety, reliability, and performance of stainless steel and alloy steel products supplied for global industrial and infrastructure projects. Each batch is verified from raw material selection to final dispatch under internationally recognized standards including ASTM, ASME, ISO, DIN, and EN.
Detects internal flaws using high-frequency sound waves
Measures yield strength, elongation, and material durability
Evaluates toughness under low-temperature and high-stress conditions
Ensures smoothness, coating quality, and visual compliance
Enhances hardness, strength, and corrosion resistance
Measures resistance to deformation and wear
Documentation & Global Compliance
- ✔ EN 10204 3.1 / 3.2 Mill Test Certificates (MTC)
- ✔ Batch-wise quality traceability and inspection records
- ✔ Third-party inspection by SGS, TUV, Bureau Veritas & Lloyd’s
- ✔ Export documentation support for customs and international shipping
Supporting supply for oil & gas, petrochemical, power generation, marine, infrastructure, and heavy engineering industries worldwide.
Related Products
Explore our full range of stainless steel and alloy steel products including pipes, tubes, fittings, flanges, sheets, plates, spools, fasteners, round bars, and special grades manufactured for industrial, infrastructure, and global export applications.
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Frequently Asked Questions
About Ragnar Metals & Tubes
- ✔ Leading manufacturer, stockist, and exporter of stainless steel and alloy steel products for industrial and infrastructure projects
- ✔ ISO 9001:2015 certified quality management system ensuring consistent product reliability and compliance
- ✔ Specialized in precision pipes, tubes, fittings, flanges, sheets, plates, fasteners, and round bars
- ✔ Modern processing and testing facilities with advanced manufacturing and inspection equipment
- ✔ Custom-engineered solutions based on client drawings and technical specifications
- ✔ Full material traceability with EN 10204 3.1 / 3.2 mill test certification
- ✔ Compliance with ASTM, ASME, DIN, EN, and ISO international standards
- ✔ Trusted global supplier supporting oil & gas, petrochemical, power, marine, and heavy engineering industries