Duplex Flanges supplier Dammam
Duplex Flanges supplier Dammam offers high-quality, corrosion-resistant flanges designed for demanding industrial environments. Manufactured from duplex stainless steel, these flanges provide an excellent balance of strength and durability, making them ideal for applications requiring resistance to stress corrosion cracking and pitting. The combination of austenitic and ferritic stainless steel phases ensures superior mechanical properties, which is essential for maintaining integrity in aggressive chemical and marine settings.
These flanges come in various types, including slip-on, weld neck, blind, and threaded, catering to diverse pipeline and pressure vessel requirements. Each product is engineered to meet international standards such as ASME, ASTM, and EN, guaranteeing compatibility and safety across global projects. The precise machining and strict quality control processes ensure tight tolerances and leak-proof connections, which are critical for maintaining system efficiency and safety.
Commonly used in oil and gas, petrochemical, and desalination plants, duplex flanges serve as vital components in pipelines transporting corrosive fluids and gases. Their enhanced resistance to chloride-induced corrosion makes them particularly suitable for offshore and coastal installations. Additionally, they support high-pressure and high-temperature operations, making them indispensable in heavy industrial applications where reliability is paramount.
Export-ready and compliant with international shipping regulations, these flanges are packaged and documented to facilitate smooth customs clearance and timely delivery. Suppliers in Dammam ensure that all products undergo rigorous testing, including radiography, ultrasonic, and hydrostatic tests, to meet global quality benchmarks. This commitment to excellence enables industrial buyers to source duplex flanges with confidence for both domestic and international projects.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex Flanges supplier Dammam 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 Dammam
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex Flanges supplier Dammam
- 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 Dammam
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 Dammam
| 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
- ✔ Excellent strength and durability
- ✔ Suitable for high-temperature applications
- ✔ Lightweight compared to traditional materials
- ✔ Cost-effective solution for various industries
- ✔ Available in various sizes and standards
Technical Overview of Duplex Flanges
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex Stainless Steel Flanges | 22% Chromium, 5% Nickel, 3% Molybdenum | Used in chemical processing, oil and gas applications | ASTM A182, ASME SA182 |
| Super Duplex Stainless Steel Flanges | 25% Chromium, 7% Nickel, 4% Molybdenum | Suitable for seawater applications and high chloride environments | ASTM A240, ASME SA240 |
| Duplex Socket Weld Flanges | F51 (UNS S31803) | Commonly used in high-pressure applications | API 6A, ISO 15156 |
Specifications Table
| Material | Duplex Stainless Steel |
|---|---|
| Grades | S31803, S32205 |
| Standard | ASME B16.5, ASTM A182 |
| Size Range | 1/2" to 24" |
| Length | Varies according to flange type |
| Form | Blind, Weld Neck, Slip-On, Socket Weld |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2205 | Fe, 22% Cr, 3% Mo, 5% Ni, 0.14% N | Oil and gas, chemical processing, marine applications |
| Duplex 2507 | Fe, 25% Cr, 7% Ni, 4% Mo, 0.3% N | Seawater desalination, petrochemical, pulp and paper industry |
| Duplex 32750 | Fe, 25% Cr, 6% Ni, 4% Mo, 0.2% N | High chloride environments, chemical storage tanks, flue gas desulfurization |
| Duplex 31803 | Fe, 22% Cr, 5.6% Ni, 3.2% Mo, 0.17% N | Oil refinery processes, gas processing, offshore applications |
| Duplex 32906 | Fe, 25% Cr, 6% Ni, 3% Mo, 0.2% N | Marine applications, heat exchangers, pressure vessels |
Available Sizes of Duplex Flanges (MM)
| Size (MM) | Size (MM) |
|---|---|
| 20 | 25 |
| 32 | 40 |
| 50 | 65 |
| 80 | 100 |
| 125 | 150 |
| 200 | 250 |
| 300 | 350 |
| 400 | 450 |
| 500 | 600 |
| 800 | 1000 |
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 |
| Phosphorus (P) | ≤ 0.03 |
| Sulfur (S) | ≤ 0.01 |
Mechanical Properties of Duplex Stainless Steel Flanges
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 - 800 |
| Yield Strength (MPa) | 450 - 600 |
| Elongation (%) | 25 |
| Hardness (HB) | 250 - 300 |
| Impact Toughness (J at -40°C) | ≥ 40 |
Duplex Flanges – Physical & Thermal Properties
Density of Duplex Flanges
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.282 lb/in³ |
Melting Point of Duplex Flanges
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1425 - 1550 °C | 2600 - 2820 °F |
Specific Heat of Duplex Flanges
| Specific Heat of Duplex Flanges | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 650 | 100 - 600 | Heating |
| 750 | 600 - 1000 | High Temperature |
Electrical Resistivity of Duplex Stainless Steel
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 72 | 20 | As-Received |
| 73 | 100 | |
| 75 | 200 | |
| 77 | 300 | |
| 80 | 400 | |
Equivalent of Duplex Flanges
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A790 | 1.4462 | S32205 |
| EN 10088-3 | X2CrNiMoN22-5-3 | S31803 |
Manufacturing Process & Heat Treatment of Duplex Flanges
Annealing
Annealing of duplex flanges is performed to relieve internal stresses and improve ductility. The flanges are heated to a temperature of approximately 1050°C to 1150°C, followed by controlled cooling to optimize the microstructure and enhance mechanical properties.
Forging
The forging process involves shaping the duplex flanges through deformation at elevated temperatures, typically around 900°C to 1200°C. This method enhances the strength and fatigue resistance of the material by refining the grain structure and eliminating porosity.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1020 - 1100 | Oil | Increase hardness and strength |
| Tempering | 600 - 800 | Air | Reduce brittleness and improve toughness |
| Stabilization | 1000 - 1100 | Air | Enhance corrosion resistance |
The combination of these manufacturing processes and heat treatments ensures that duplex flanges possess superior mechanical properties and corrosion resistance, making them suitable for a wide range of industrial applications.
Various Types
Duplex Stainless Steel Slip-On Flange
- Dimensions: 1" to 24"
- Condition: ASTM A182, A240
- Applications: Oil & Gas, Chemical Processing
Duplex Stainless Steel Blind Flange
- Dimensions: 1" to 36"
- Condition: ASTM A182, A240
- Applications: Water Treatment, Marine Applications
Duplex Stainless Steel Weld Neck Flange
- Dimensions: 2" to 30"
- Condition: ASTM A182, A240
- Applications: Power Generation, Petrochemical
Duplex Stainless Steel Threaded Flange
- Dimensions: 1" to 12"
- Condition: ASTM A182, A240
- Applications: Industrial Piping Systems
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 | $5.50 – $6.00 | ₹455 – ₹495 |
| Duplex Flanges | 6 mm | $5.20 – $5.80 | ₹440 – ₹480 |
| Duplex Flanges | 10 mm | $4.90 – $5.40 | ₹410 – ₹450 |
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