Super Duplex Flanges exporter in Qatar
Super Duplex Flanges exporter in Qatar plays a crucial role in supplying high-performance piping components to industries requiring exceptional corrosion resistance and mechanical strength. These flanges are manufactured from super duplex stainless steel, an alloy known for its enhanced resistance to chloride stress corrosion cracking, pitting, and crevice corrosion. This makes them ideal for use in harsh environments such as offshore oil and gas platforms, chemical processing plants, and desalination facilities.
The flanges are available in various types including weld neck, slip-on, blind, and threaded flanges, each designed to meet specific piping system requirements. Precision-engineered to comply with international standards such as ASTM, ASME, and ISO, these components ensure reliable sealing and structural integrity under high pressure and temperature conditions. Their duplex microstructure combines austenitic and ferritic phases, providing superior strength and durability compared to conventional stainless steel flanges.
Applications for these flanges extend across multiple sectors, including petrochemical, marine, and power generation. Their ability to withstand aggressive media and extreme conditions makes them indispensable in pipelines transporting seawater, hydrocarbons, and corrosive chemicals. Additionally, their compatibility with various welding techniques facilitates seamless integration into complex piping networks, enhancing operational efficiency and safety.
Export readiness is a key aspect for suppliers in Qatar, where stringent quality control and documentation protocols are adhered to, ensuring timely delivery and compliance with international shipping regulations. Packaging is optimized to protect the flanges from mechanical damage and environmental factors during transit. Moreover, exporters often provide customization options and technical support to meet specific project requirements, reinforcing their position as reliable partners in the global industrial supply chain.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Super Duplex Flanges exporter in Qatar 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 Super Duplex Flanges exporter in Qatar
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Super Duplex Flanges exporter in Qatar
- 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 Super Duplex Flanges exporter in Qatar
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 Super Duplex Flanges exporter in Qatar
| 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 Super Duplex Flanges
- ✔ High resistance to corrosion, especially in chloride environments
- ✔ Superior mechanical properties at elevated temperatures
- ✔ Excellent weldability, reducing the risk of defects in fabrication
- ✔ High strength-to-weight ratio, making them ideal for various applications
- ✔ Extended service life, leading to reduced maintenance costs
- ✔ Compliance with international standards, ensuring quality and reliability
Technical Overview of Super Duplex Flanges
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Super Duplex Steel Flanges | 25% Chromium, 7% Nickel, 4% Molybdenum | Used in high-pressure and high-temperature environments, particularly in oil and gas industries | ASTM A182, ASTM A240, ASME B16.5 |
| Super Duplex Blind Flanges | 25% Chromium, 7% Nickel, 4% Molybdenum | Designed to seal off the end of a piping system | ASTM A182, ASTM A240, ASME B16.5 |
| Super Duplex Weld Neck Flanges | 25% Chromium, 7% Nickel, 4% Molybdenum | Provides a strong connection for piping and is suitable for high-stress applications | ASTM A182, ASTM A240, ASME B16.5 |
Specifications Table
| Material | Super Duplex Stainless Steel |
|---|---|
| Grades | F53, F55 |
| Standard | ASTM A182, ASME SA182 |
| Size Range | 1/2" to 48" |
| Length | Custom Lengths Available |
| Form | Flanges (Slip-on, Weld Neck, Blind, etc.) |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Super Duplex 2507 | Cr 24%, Ni 7%, Mo 4%, W 0.5% | Oil and gas, chemical processing, desalination plants |
| Super Duplex 32750 | Cr 25%, Ni 7%, Mo 4.5%, N 0.2% | Marine environments, pulp and paper industries, offshore platforms |
| Super Duplex 32760 | Cr 26%, Ni 8%, Mo 5%, N 0.3% | Heavy-duty applications, chemical reactors, high-pressure vessels |
| Super Duplex 2507 CL | Cr 25%, Ni 7%, Mo 4%, N 0.14% | Subsea applications, power generation, and thermal desalination |
| Super Duplex 255 | Cr 24%, Ni 6%, Mo 5%, N 0.2% | Corrosive environments, water treatment facilities, oil refineries |
Available Sizes of Super Duplex Flanges (MM)
| Size (MM) | Size (MM) |
|---|---|
| 15 | 20 |
| 25 | 30 |
| 40 | 50 |
| 65 | 80 |
| 100 | 125 |
| 150 | 200 |
| 250 | 300 |
| 350 | 400 |
| 450 | 500 |
| 600 | 800 |
Chemical Properties of Super Duplex Steel
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 24.0 - 26.0 |
| Nickel (Ni) | 6.0 - 8.0 |
| Molybdenum (Mo) | 3.0 - 4.0 |
| Iron (Fe) | Balance |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 1.0 max |
| Carbon (C) | 0.03 max |
| Sulfur (S) | 0.01 max |
Mechanical Properties of Super Duplex Stainless Steel
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 - 800 |
| Yield Strength (MPa) | 450 - 600 |
| Elongation (%) | 25 |
| Hardness (HB) | 250 - 300 |
| Impact Toughness (J @ -40°C) | ≥ 40 |
Super Duplex Flanges – Physical & Thermal Properties
Density of Super Duplex Flanges
| Property | Metric | Imperial |
|---|---|---|
| Density | 7,800 kg/m³ | 0.28 lb/in³ |
Melting Point of Super Duplex Flanges
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1,450 °C | 2,642 °F |
Specific Heat of Super Duplex Flanges
| Specific Heat of Super Duplex Flanges | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20-100 | Annealed |
| 460 | 100-400 | Hot Working |
| 400 | 400-800 | Heat Treated |
Electrical Resistivity of Super Duplex Steel
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.70 | 20 | As-Received |
| 0.75 | 100 | |
| 0.78 | 200 | |
| 0.80 | 300 | |
| 0.82 | 400 | |
Equivalent of Super Duplex Flanges
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A182 | 1.4410 | S32750 |
| ASTM A240 | 1.4501 | S32760 |
Manufacturing Process & Heat Treatment of Super Duplex Flanges
Annealing
The annealing process for super duplex flanges involves heating the material to a temperature range of approximately 1000°C to 1100°C, followed by a slow cooling process. This treatment helps in relieving internal stresses, enhancing ductility, and improving the overall mechanical properties of the flanges.
Forging
Forging of super duplex flanges is carried out at elevated temperatures, typically between 1100°C and 1200°C. This process involves shaping the metal using compressive forces, which results in finer grain structures and improved strength and toughness in the final product.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1020 - 1100 | Oil | Increase hardness and strength |
| Tempering | 500 - 800 | Air | Reduce brittleness and relieve stresses |
| Stress Relieving | 600 - 700 | Air | Enhance dimensional stability |
The combination of these heat treatment processes ensures that super duplex flanges possess optimal mechanical properties suitable for various industrial applications, especially in corrosive environments.
Various Types
Super Duplex Flange - ASTM A182 F51
- Dimensions: 1" to 36" (DN25 to DN900)
- Condition: Hot-rolled and Cold-rolled
- Applications: Oil and gas, chemical processing, marine applications
Super Duplex Flange - ASTM A182 F53
- Dimensions: 1" to 24" (DN25 to DN600)
- Condition: Annealed
- Applications: Desalination plants, pulp and paper industry
Super Duplex Flange - ASTM A240 S32750
- Dimensions: 3" to 30" (DN80 to DN750)
- Condition: Pickled and passivated
- Applications: Chemical processing, offshore platforms
Super Duplex Flange - ASTM A240 S32760
- Dimensions: 2" to 12" (DN50 to DN300)
- Condition: Solution annealed
- Applications: High-pressure applications, petrochemical industry
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 Super Duplex Flanges
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Super Duplex | 3 mm | $5.50 – $6.00 | ₹450 – ₹490 |
| Super Duplex | 6 mm | $5.80 – $6.30 | ₹470 – ₹510 |
| Super Duplex | 10 mm | $6.00 – $6.50 | ₹490 – ₹530 |
Note: Prices are indicative and may vary based on size, quantity, raw material cost, and delivery location. Contact us for the latest quotation for Super 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.
People Also Search For
- Super Duplex Steel Suppliers in Qatar
- Duplex Flanges Manufacturers in Qatar
- Stainless Steel Flanges Exporters in Qatar
- Super Duplex Pipe Fittings in Qatar
- Industrial Flanges Suppliers in Qatar
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