Duplex Spool exporter in Qatar
Duplex Spool exporter in Qatar specializes in supplying high-quality duplex stainless steel piping spools tailored for demanding industrial applications. These spools are fabricated from duplex stainless steel, known for its superior corrosion resistance, high strength, and excellent weldability, making them ideal for environments exposed to chloride stress and harsh chemicals. The manufacturing process adheres to stringent international standards, ensuring that each spool meets precise dimensional and material specifications required by the oil and gas, petrochemical, and marine sectors.
The product range typically includes welded pipe sections, flanges, fittings, and other components pre-assembled into ready-to-install spools. Duplex alloys such as UNS S31803 and S32205 are commonly used, offering a balanced microstructure of ferritic and austenitic phases. This composition provides enhanced mechanical properties and resistance to pitting and crevice corrosion, crucial for offshore platforms, refineries, and chemical processing plants operating in aggressive environments.
Applications for these duplex piping spools extend across various industrial sectors, including oil and gas exploration, desalination plants, and power generation facilities. Their robustness under high pressure and temperature conditions, coupled with excellent fatigue resistance, ensures reliable performance in critical process lines. Export readiness is a key focus, with exporters in Qatar ensuring compliance with international shipping protocols, proper packaging to prevent damage, and timely delivery schedules to meet global project demands.
Moreover, quality assurance processes such as PMI testing, hydrostatic testing, and radiographic inspection are routinely performed to guarantee material integrity and weld quality. This attention to detail supports the exporter's commitment to delivering spools that not only meet but exceed client expectations. Industrial buyers can benefit from customized solutions tailored to project-specific requirements, supported by technical consultation and after-sales service.
In summary, sourcing duplex stainless steel spools from a reputable exporter in Qatar offers industrial buyers access to durable, corrosion-resistant piping solutions engineered for challenging applications. With a focus on material excellence, precise fabrication, and robust export logistics, these suppliers are well-positioned to support large-scale infrastructure projects worldwide.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex Spool 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 Duplex Spool exporter in Qatar
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex Spool 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 Duplex Spool 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 Duplex Spool 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 Duplex Spool
- ✔ Excellent corrosion resistance in harsh environments
- ✔ High strength-to-weight ratio for improved performance
- ✔ Versatile for use in various industries including oil and gas
- ✔ Superior weldability and formability
- ✔ Enhanced thermal stability for high-temperature applications
- ✔ Availability in various grades and sizes to meet specific requirements
Technical Overview of Duplex Spool
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex Stainless Steel Spool | 22% Chromium, 5% Nickel, 3% Molybdenum | Used in oil and gas, chemical processing, and marine applications | ASTM A790, ASME SA790 |
| Duplex Stainless Steel Spool | 25% Chromium, 7% Nickel, 4% Molybdenum | Suitable for high-stress environments and corrosive substances | ISO 15156, NACE MR0175 |
| Duplex Stainless Steel Spool | Duplex 2205 | Commonly utilized in seawater applications and heat exchangers | EN 10216-5, ASTM A928 |
Specifications Table
| Material | Duplex Stainless Steel |
|---|---|
| Grades | S31803, S32205 |
| Standard | ASTM A790, ASME SA790 |
| Size Range | 1/2" to 24" (NPS) |
| Length | Up to 20 feet |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex Steel S32205 | 22% Cr, 5% Ni, 3% Mo | Oil and gas, chemical processing, marine environments |
| Duplex Steel S31803 | 21% Cr, 5.5% Ni, 3.2% Mo | Offshore platforms, pulp and paper, pressure vessels |
| Duplex Steel S32750 | 25% Cr, 7% Ni, 4% Mo | Desalination plants, petrochemical industries, high-strength applications |
| Duplex Steel S32550 | 24% Cr, 6% Ni, 3.5% Mo | Power generation, water treatment, oil refining |
| Duplex Steel S32760 | 26% Cr, 7% Ni, 3.5% Mo | Marine applications, chemical processing, subsea equipment |
Available Sizes of Duplex Spool (MM)
| Size (MM) | Size (MM) |
|---|---|
| 25 | 50 |
| 32 | 63 |
| 40 | 76 |
| 50 | 89 |
| 63 | 102 |
| 76 | 114 |
| 89 | 140 |
| 102 | 168 |
| 114 | 219 |
| 140 | 273 |
Chemical Properties of Duplex Stainless Steel (UNS S32205)
| Element | Composition (%) |
|---|---|
| Iron (Fe) | 65.0 - 70.0 |
| Chromium (Cr) | 22.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 3.0 - 4.0 |
| Manganese (Mn) | 1.0 - 2.0 |
| Silicon (Si) | 0.5 - 1.0 |
| Carbon (C) | 0.03 max |
| Sulfur (S) | 0.01 max |
Mechanical Properties of Duplex Stainless Steel
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 - 800 |
| Yield Strength (MPa) | 450 - 600 |
| Elongation (%) | 25 - 40 |
| Hardness (Rockwell B) | 80 - 95 |
| Impact Toughness (J at -40°C) | ≥ 40 |
Duplex Stainless Steel – Physical & Thermal Properties
Density of Duplex Stainless Steel
| Property | Metric | Imperial |
|---|---|---|
| Density | 7,800 kg/m³ | 0.281 lb/in³ |
Melting Point of Duplex Stainless Steel
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1,300 - 1,400 °C | 2,372 - 2,552 °F |
Specific Heat of Duplex Stainless Steel
| Specific Heat of Duplex Stainless Steel | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Solid |
| 520 | 100 - 600 | Solid |
| 600 | 600 - 1,000 | Solid |
Electrical Resistivity of Duplex Stainless Steel
| 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 Spool
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A790 | 1.4462 | S31803 |
| EN 10088-3 | X2CrNiMoN22-5-3 | S32205 |
Manufacturing Process & Heat Treatment of Duplex Spool
Annealing
Annealing of duplex spools involves heating the material to a temperature range of 1000-1100°C, followed by controlled cooling. This process helps to relieve internal stresses, improve ductility, and enhance overall mechanical properties, ensuring the material is ready for subsequent manufacturing stages.
Forging
The forging process for duplex spools is conducted at temperatures between 1100-1200°C. This method shapes the material through compressive forces, which results in improved grain structure and mechanical strength, making the spools suitable for high-pressure applications.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 950-1050 | Oil or Water | Increase hardness and strength of the material. |
| Tempering | 600-800 | Air | Reduce brittleness while maintaining sufficient hardness. |
| Stress Relieving | 400-600 | Air | Minimize residual stresses from previous processing. |
The combination of these processes ensures that duplex spools exhibit optimal mechanical properties, enhancing their performance and longevity in various industrial applications.
Various Types
Duplex Stainless Steel Spool A
- Diameter: 2 inches, Length: 6 feet
- Condition: New
- Applications: Oil and Gas, Water Treatment
Duplex Stainless Steel Spool B
- Diameter: 3 inches, Length: 8 feet
- Condition: New
- Applications: Chemical Processing, Marine Applications
Duplex Stainless Steel Spool C
- Diameter: 4 inches, Length: 10 feet
- Condition: New
- Applications: Power Generation, Pulp and Paper
Duplex Stainless Steel Spool D
- Diameter: 5 inches, Length: 12 feet
- Condition: New
- Applications: Food and Beverage, 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 Spools
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex Spools | 3 mm | $2.50 – $3.00 | ₹207 – ₹248 |
| Duplex Spools | 6 mm | $2.80 – $3.30 | ₹232 – ₹273 |
| Duplex Spools | 10 mm | $3.00 – $3.50 | ₹248 – ₹290 |
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 Spools.
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 Supplier in Qatar
- Stainless Steel Spool Manufacturer in Qatar
- Duplex Fittings Exporter in Qatar
- Industrial Pipe Supplier Qatar
- Qatar 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