Duplex Pipe exporter in Singapore
Duplex Pipe exporter in Singapore offers high-grade stainless steel pipes known for their exceptional corrosion resistance and mechanical strength. These pipes are manufactured using duplex stainless steel, a combination of austenitic and ferritic stainless steel, providing superior durability in harsh environments. The material's unique microstructure ensures excellent resistance to stress corrosion cracking, making it ideal for demanding industrial applications.
These duplex pipes are available in various grades, including UNS S31803 and S32205, which feature a balanced composition of chromium, nickel, and molybdenum. The product range typically includes seamless and welded pipes, with precise dimensions tailored to meet international standards such as ASTM A789 and EN 10216. Their high tensile strength and toughness make them suitable for high-pressure environments, ensuring long service life and reliability.
Industries such as oil and gas, chemical processing, marine, and desalination plants widely utilize these pipes due to their excellent resistance to chloride-induced corrosion and pitting. The duplex pipes are particularly favored for applications involving aggressive chemicals, seawater exposure, and environments requiring enhanced structural integrity. Their versatility extends to heat exchangers, pressure vessels, and pipelines carrying corrosive fluids.
Singapore-based suppliers maintain stringent quality control protocols and certification compliance, ensuring that all exported products meet international shipping and material standards. Packaging and logistics are optimized for global distribution, guaranteeing timely delivery and product integrity upon arrival. Export readiness is supported by comprehensive documentation, including mill test reports and traceability certificates.
For industrial buyers seeking reliable and robust duplex stainless steel piping solutions, sourcing from a reputable exporter in Singapore ensures access to premium materials backed by expert technical support. This facilitates seamless integration into complex projects, reducing maintenance costs and enhancing operational efficiency across various sectors.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex Pipe exporter in Singapore 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 in Singapore
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex Pipe exporter in Singapore
- 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 in Singapore
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 in Singapore
| 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 Pipes
- ✔ High corrosion resistance, ideal for harsh environments
- ✔ Excellent strength-to-weight ratio, ensuring durability
- ✔ Superior weldability for easy installation and maintenance
- ✔ Versatile applications across various industries
- ✔ Cost-effective solution for long-term projects
- ✔ Compliant with international quality standards
Technical Overview of Duplex Pipe
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex Stainless Steel Pipe | 22% Cr, 5% Ni, 3% Mo, balance Fe | Oil and gas, chemical processing, marine applications | ASTM A790, ASME SA790 |
| Super Duplex Stainless Steel Pipe | 25% Cr, 7% Ni, 4% Mo, balance Fe | High-pressure applications, offshore platforms, desalination plants | ASTM A928, ASME SA928 |
| Duplex Pipe Fittings | 22% Cr, 5% Ni, 3% Mo, balance Fe | Piping systems in various industries | ASTM A815, ASME SA815 |
Specifications Table
| Material | Duplex Stainless Steel |
|---|---|
| Grades | S31803, S32205 |
| Standard | ASTM A790, ASME SA790 |
| Size Range | 1/2" to 24" |
| Length | Custom lengths available up to 12 meters |
| Form | Seamless and Welded Pipes |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2205 | 22% Cr, 5% Ni, 3% Mo | Oil and gas, chemical processing, marine environments |
| Duplex 2507 | 25% Cr, 7% Ni, 4% Mo | Seawater applications, chemical processing, desalination plants |
| Duplex 2011 | 19% Cr, 6% Ni, 2.5% Mo | High strength applications, oil and gas industry |
| Super Duplex 32750 | 25% Cr, 7% Ni, 4% Mo | Marine applications, chemical processing, pulp and paper industry |
| Duplex 31803 | 22% Cr, 5.6% Ni, 3% Mo | Storage tanks, heat exchangers, pressure vessels |
Available Sizes of Duplex Pipe (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 (UNS S31803)
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 22.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 3.0 - 3.5 |
| Iron (Fe) | Bal. |
| Manganese (Mn) | 0.8 - 1.5 |
| Silicon (Si) | 0.5 |
| Carbon (C) | ≤ 0.03 |
| Phosphorus (P) | ≤ 0.03 |
Mechanical Properties of Duplex Stainless Steel
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 - 800 |
| Yield Strength (MPa) | 450 - 600 |
| Elongation (%) | 25 - 40 |
| Hardness (HRC) | 28 - 34 |
| Impact Toughness (J at -50°C) | 50 |
Duplex Pipe – Physical & Thermal Properties
Density of Duplex Pipe
| Property | Metric | Imperial |
|---|---|---|
| Density | 7,800 kg/m³ | 487 lb/ft³ |
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 | Solid |
| 520 | 100 - 300 | Solid |
| 540 | 300 - 600 | Solid |
Electrical Resistivity of Duplex Stainless Steel
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.72 | 20 | Annealed |
| 0.78 | 100 | |
| 0.85 | 200 | |
| 0.90 | 300 | |
| 0.95 | 400 | |
Equivalent of Duplex Stainless Steel
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A790 | 1.4462 | S32205 |
| EN 10088-3 | X2CrNiMoN22-5-3 | S31803 |
Manufacturing Process & Heat Treatment of Duplex Steel Pipe
Annealing
Annealing of duplex steel pipes involves heating the material to a temperature range of 1020°C to 1100°C, followed by controlled cooling. This process helps to reduce internal stresses, improve ductility, and enhance the overall mechanical properties of the steel, ensuring optimal performance in various applications.
Forging
Forging of duplex steel pipes is conducted at elevated temperatures between 1050°C and 1200°C. This process enhances the grain structure, increases strength, and provides superior toughness. The forged pipes are then subjected to further processing to achieve the desired dimensions and specifications.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000 - 1100 | Water or Oil | Increase hardness and strength |
| Tempering | 600 - 800 | Air | Reduce brittleness and improve toughness |
| Stress Relieving | 500 - 600 | Air | Minimize residual stresses after machining |
The combination of these processes ensures that duplex steel pipes meet the stringent requirements for strength, corrosion resistance, and durability, making them suitable for a wide range of industrial applications.
Various Types
Duplex Stainless Steel Pipe
- 1/2" to 24" diameter
- Condition: Annealed and Pickled
- Applications: Oil & Gas, Chemical Processing
Duplex 2205 Pipe
- 1" to 16" diameter
- Condition: Hot Finished
- Applications: Marine Applications, Power Generation
Super Duplex Pipe
- 3/4" to 12" diameter
- Condition: Cold Drawn
- Applications: Desalination Plants, Offshore Platforms
Duplex 2507 Pipe
- 1/2" to 10" diameter
- Condition: Solution Annealed
- Applications: Chemical and 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 Duplex Pipes
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex 2205 | 3 mm | $2.50 – $3.00 | ₹205 – ₹246 |
| Duplex 2205 | 6 mm | $2.60 – $3.10 | ₹214 – ₹255 |
| Duplex 2205 | 10 mm | $2.70 – $3.20 | ₹223 – ₹264 |
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 Steel Pipe Suppliers in Singapore
- Stainless Steel Pipe Exporters in Singapore
- Nickel Alloy Pipe Manufacturers in Singapore
- Pipe Fittings Exporters in Singapore
- Seamless Pipe Suppliers in Singapore
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