Duplex Pipe exporter
Duplex Pipe exporter companies specialize in supplying high-grade duplex stainless steel pipes known for their superior strength and corrosion resistance. These pipes are manufactured using a blend of austenitic and ferritic stainless steel, offering enhanced durability and excellent performance in harsh industrial environments. Typically composed of grades such as 2205 and 2507, these materials provide an ideal balance of toughness and resistance to chloride stress corrosion cracking, making them suitable for demanding applications.
These seamless and welded pipes come in various dimensions and thicknesses to meet diverse industrial requirements. The dual-phase microstructure ensures high tensile strength and robust mechanical properties, which are crucial for sectors like oil and gas, chemical processing, and marine engineering. Precision in manufacturing and adherence to international standards such as ASTM, ASME, and EN ensure that these products deliver consistent quality and reliability during operation.
Applications for these pipes are vast, spanning from offshore platforms and desalination plants to power generation and wastewater treatment facilities. Their ability to withstand aggressive environments, including exposure to saltwater and acidic media, makes them indispensable for industries requiring long-term performance and minimal maintenance. Additionally, the excellent weldability and formability of these pipes facilitate their integration into complex piping systems.
Exporters focus on ensuring that all shipments comply with global trade regulations and quality certifications, providing detailed documentation such as mill test reports, third-party inspection certificates, and packing lists. This export readiness guarantees smooth customs clearance and timely delivery to international clients. Custom packaging solutions and efficient logistics support further enhance the supply chain experience for buyers worldwide.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex Pipe exporter 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 Pipe exporter
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex Pipe exporter
- 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 Pipe exporter
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 Pipe exporter
| 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 Pipe
- ✔ High resistance to stress corrosion cracking
- ✔ Excellent weldability and fabrication properties
- ✔ Superior mechanical strength compared to standard stainless steels
- ✔ Enhanced resistance to pitting and crevice corrosion
- ✔ Suitable for high-pressure and high-temperature applications
- ✔ Cost-effective alternative to nickel alloys in many applications
Technical Overview of Duplex Pipe
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex Stainless Steel Pipe | 22% Chromium, 5% Nickel, 3% Molybdenum | Oil and Gas, Chemical Processing, Marine Applications | ASTM A790, ASTM A928 |
| Duplex Pipe Fittings | 25% Chromium, 7% Nickel, 4% Molybdenum | Pressure Vessels, Heat Exchangers, Piping Systems | ASME B16.5, ASME B16.9 |
| Duplex Seamless Pipe | 22% Chromium, 5% Nickel, 3% Molybdenum | Power Generation, Water Treatment, Desalination | API 5L, ISO 3183 |
Specifications Table
| Material | Duplex Stainless Steel |
|---|---|
| Grades | S31803, S32205, S32750 |
| Standard | ASTM A790, ASME SA790 |
| Size Range | 1/2" to 24" |
| Length | Random lengths up to 6 meters |
| Form | Seamless and Welded |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2205 Pipe | 22% Chromium, 5% Nickel, 3% Molybdenum | Oil and gas, chemical processing, marine environments |
| Duplex 2507 Pipe | 25% Chromium, 7% Nickel, 4% Molybdenum | Desalination, offshore oil and gas, chemical industry |
| Duplex 32750 Pipe | 25% Chromium, 6% Nickel, 0.5% Nitrogen | Pulp and paper, petrochemical, and marine applications |
| Duplex 32906 Pipe | 25% Chromium, 7% Nickel, 4% Molybdenum, 0.2% Nitrogen | Oil and gas, chemical processing, heat exchangers |
| Super Duplex 2507 Pipe | 25% Chromium, 7% Nickel, 4% Molybdenum, 0.3% Nitrogen | High chloride environments, oil and gas, subsea applications |
Available Sizes of Duplex Pipe (MM)
| Size (MM) | Size (MM) |
|---|---|
| 20 | 25 |
| 32 | 40 |
| 50 | 65 |
| 80 | 100 |
| 125 | 150 |
| 200 | 250 |
| 300 | 350 |
| 400 | 450 |
| 500 | 600 |
| 750 | 900 |
Chemical Properties of Duplex Stainless Steel
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 19.0 - 28.0 |
| 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 |
| Sulfur (S) | ≤ 0.01 |
| Iron (Fe) | Balance |
Mechanical Properties of Duplex Stainless Steel Pipe
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 - 850 |
| Yield Strength (MPa) | 450 - 600 |
| Elongation (%) | 25 - 30 |
| Hardness (HB) | 250 - 300 |
| Impact Toughness (J) | ≥ 40 (at -40°C) |
Duplex Pipe – Physical & Thermal Properties
Density of Duplex Pipe
| Property | Metric | Imperial |
|---|---|---|
| Density | 7,800 kg/m³ | 0.28 lb/in³ |
Melting Point of Duplex Pipe
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1,400 - 1,450 °C | 2,552 - 2,642 °F |
Specific Heat of Duplex Pipe
| Specific Heat of Duplex Pipe | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 600 | 100 - 400 | Normal Condition |
| 700 | 400 - 800 | High Temperature |
Electrical Resistivity of Duplex Stainless Steel
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.72 | 20 | As Fabricated |
| 0.75 | 100 | |
| 0.78 | 200 | |
| 0.80 | 300 | |
| 0.82 | 400 | |
Equivalent of Duplex Pipe
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A790 | 1.4462 | S32205 |
| EN 10088-3 | X2CrNiMoN22-5-3 | S31803 |
Manufacturing Process & Heat Treatment of Duplex Pipes
Annealing
Annealing of duplex pipes involves heating the material to a temperature range of 1000°C to 1100°C, followed by controlled cooling. This process helps to relieve internal stresses and enhance ductility, ensuring the pipes maintain their structural integrity during service.
Forging
Forging of duplex pipes is performed at elevated temperatures, typically between 1050°C and 1200°C. This process improves the mechanical properties of the steel, including strength and toughness, by refining the grain structure and eliminating defects.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000 - 1100 | Oil or Water | To increase hardness and strength |
| Tempering | 600 - 800 | Air | To reduce brittleness and improve toughness |
| Stress Relieving | 300 - 600 | Air | To relieve residual stresses from the material |
The combination of these manufacturing and heat treatment processes ensures that duplex pipes achieve the desired mechanical properties and performance characteristics required for various industrial applications.
Various Types
Duplex Stainless Steel Pipe 2205
- 1/2" to 24" Diameter
- Annealed, Pickled
- Oil & Gas, Chemical Processing
Duplex Stainless Steel Pipe 2507
- 1/2" to 12" Diameter
- Cold Drawn, Bright Annealed
- Marine Applications, Desalination
Duplex Stainless Steel Pipe 32750
- 1" to 10" Diameter
- Heat Treated
- Power Generation, Pulp & Paper
Duplex Stainless Steel Pipe 31803
- 3/4" to 16" Diameter
- As Welded
- Food Processing, Pharmaceutical
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 Pipes
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex Steel | 3 mm | $3.50 – $4.00 | ₹290 – ₹320 |
| Duplex Steel | 6 mm | $3.80 – $4.30 | ₹310 – ₹340 |
| Duplex Steel | 10 mm | $4.00 – $4.50 | ₹320 – ₹350 |
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 Pipes.
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 Stainless Steel Pipe Suppliers
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- Duplex Steel Pipe Price List
- Duplex Pipe Fittings Exporter
- Duplex Steel Seamless Pipe
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