Duplex Flanges exporter in Oman
Duplex Flanges exporter in Oman plays a crucial role in supplying high-performance flange solutions to meet the demanding needs of various industrial sectors. Manufactured from duplex stainless steel, these flanges offer exceptional resistance to corrosion, high strength, and durability, making them ideal for harsh environments. The combination of austenitic and ferritic stainless steel phases in duplex materials ensures superior mechanical properties and enhanced longevity compared to standard stainless steel flanges.
These flanges are available in various types, including weld neck, slip-on, blind, and threaded flanges, catering to diverse piping system requirements. They conform to international standards such as ASTM A182, ASME B16.5, and EN specifications, ensuring compatibility and reliability in critical applications. The precision engineering and strict quality control during manufacturing guarantee excellent dimensional accuracy and pressure handling capabilities, suitable for high-pressure and high-temperature conditions.
Widely used across industries such as oil and gas, petrochemical, seawater desalination, and chemical processing, duplex flanges are essential components in pipelines, pressure vessels, and heat exchangers. Their corrosion resistance makes them particularly effective in chloride-rich environments, reducing maintenance costs and downtime. The robust nature of these flanges supports extended service life, which is a significant advantage for industrial buyers focusing on operational efficiency.
Export readiness is a key aspect of suppliers in Oman, ensuring that duplex flanges are packaged and shipped following international logistics standards. This includes protective coatings, secure crating, and compliance with export documentation requirements to facilitate smooth customs clearance. Buyers can expect timely delivery and after-sales support, which are critical for maintaining project timelines and operational continuity in overseas markets.
For industrial buyers seeking reliable duplex flange solutions, partnering with a reputable exporter in Oman offers access to high-quality materials, certified products, and competitive pricing. The strategic location of Oman as a trading hub further enhances supply chain efficiency, supporting large-scale projects across the Middle East and beyond. This combination of quality, compliance, and logistical expertise makes these flanges a preferred choice for demanding industrial applications.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex Flanges exporter in Oman 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 exporter in Oman
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex Flanges exporter in Oman
- 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 exporter in Oman
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 exporter in Oman
| 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
- ✔ Excellent corrosion resistance
- ✔ High strength and durability
- ✔ Suitable for high-pressure applications
- ✔ Cost-effective compared to other alloys
- ✔ Wide range of sizes and dimensions available
- ✔ Excellent weldability and formability
Technical Overview of Duplex Flanges
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex Steel Flanges | 22% Chromium, 5% Nickel, 3% Molybdenum | Used in oil and gas, chemical processing, and marine applications | ASTM A182, ASTM A240 |
| Super Duplex Flanges | 25% Chromium, 7% Nickel, 4% Molybdenum | Designed for high-pressure and high-temperature applications | ASTM A790, ASTM A928 |
| Duplex Blind Flanges | 22% Chromium, 5% Nickel | Used to seal off the end of a piping system | ASME B16.5, ASME B16.47 |
Specifications Table
| Material | Duplex Stainless Steel |
|---|---|
| Grades | 2205, 2507 |
| Standard | ASTM A182, ASME B16.5 |
| Size Range | 1/2" to 24" |
| Length | Customizable to client specifications |
| Form | Blind, Slip-On, Weld Neck, Threaded |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2205 | Fe, 22% Cr, 5% Ni, 3% Mo | Oil and gas, chemical processing, pulp and paper |
| Duplex 2507 | Fe, 25% Cr, 7% Ni, 4% Mo | Marine environments, desalination plants |
| Duplex 31803 | Fe, 20% Cr, 5% Ni, 3% Mo, 0.17% N | Structural components, storage tanks |
| Super Duplex 2507 | Fe, 25% Cr, 7% Ni, 4% Mo, 0.24% N | High strength applications, offshore platforms |
| Duplex 32750 | Fe, 25% Cr, 7% Ni, 4% Mo, 0.22% N | Refining, petrochemical industries |
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 | 700 |
Chemical Properties of Duplex Stainless Steel
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 22.0 - 25.0 |
| Nickel (Ni) | 4.5 - 8.0 |
| Molybdenum (Mo) | 3.0 - 5.0 |
| Manganese (Mn) | 0.5 - 2.0 |
| Silicon (Si) | 0.5 - 1.0 |
| Carbon (C) | 0.03 max |
| Phosphorus (P) | 0.03 max |
| Sulfur (S) | 0.01 max |
Mechanical Properties of Duplex Stainless Steel
| Property | Value |
|---|---|
| Yield Strength (MPa) | 450 |
| Tensile Strength (MPa) | 620 |
| Elongation (%) | 25 |
| Hardness (HB) | 250 |
| Impact Toughness (J at -40°C) | 40 |
Duplex Steel – Physical & Thermal Properties
Density of Duplex Steel
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.28 lb/in³ |
Melting Point of Duplex Steel
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1350 - 1450 °C | 2462 - 2642 °F |
Specific Heat of Duplex Steel
| Specific Heat of Duplex Steel | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 600 | 100 - 500 | Heating |
| 700 | 500 - 1000 | High Temperature |
Electrical Resistivity of Duplex Flanges
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.72 | 20 | As-rolled |
| 0.75 | 100 | |
| 0.78 | 200 | |
| 0.80 | 300 | |
| 0.82 | 400 | |
Equivalent of Duplex Flanges
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A240 | 1.4462 | S32205 |
| EN 10088-3 | X2CrNiMoN22-5-3 | S31803 |
Manufacturing Process & Heat Treatment of Duplex Flanges
Annealing
Annealing of duplex flanges involves heating the material to a temperature range of 1020°C to 1100°C, followed by cooling it slowly in a furnace. This process helps to relieve internal stresses, improve ductility, and refine grain structure, ensuring optimal mechanical properties for the flanges.
Forging
The forging process for duplex flanges entails heating the raw material to approximately 1150°C and then shaping it under high pressure. This method enhances the strength and structural integrity of the flanges, making them suitable for high-pressure applications in various industries.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000 - 1100 | Oil | Increase hardness and strength |
| Tempering | 600 - 800 | Air | Reduce brittleness and improve toughness |
| Stress Relieving | 400 - 600 | Air | Minimize residual stresses |
The combination of these processes ensures that duplex flanges possess the necessary mechanical properties and resistance to corrosion, making them ideal for use in various industrial applications, including oil and gas, chemical processing, and marine environments.
Various Types
Duplex 2205 Flanges
- Dimensions: 1/2" to 24"
- Condition: Hot Rolled, Cold Worked
- Applications: Oil & Gas, Chemical Processing
Duplex 2507 Flanges
- Dimensions: 1" to 30"
- Condition: Solution Annealed
- Applications: Marine, Desalination Plants
Duplex 31803 Flanges
- Dimensions: 3/4" to 16"
- Condition: Pickled and Passivated
- Applications: Pulp & Paper, Wastewater Treatment
Duplex 32750 Flanges
- Dimensions: 1" to 12"
- Condition: Hot Forged
- Applications: High-Pressure Applications, Petrochemical
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 Flanges | 3 mm | $5.00 – $5.50 | ₹410 – ₹450 |
| Duplex Flanges | 6 mm | $5.20 – $5.70 | ₹425 – ₹465 |
| Duplex Flanges | 10 mm | $5.50 – $6.00 | ₹450 – ₹490 |
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.
People Also Search For
- Duplex Steel Pipe Suppliers in Oman
- Stainless Steel Flanges Manufacturers in Oman
- Nickel Alloy Flanges Exporters in Oman
- Carbon Steel Flanges Suppliers in Oman
- Oman Metal Fabrication Services
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