Super Duplex Spool manufacturer
Super Duplex Spool manufacturer specializes in producing high-quality piping components crafted from super duplex stainless steel, known for its exceptional strength and corrosion resistance. These spools serve as critical connectors in piping systems, designed to withstand harsh environments such as offshore oil rigs, chemical plants, and desalination units. The material composition typically includes a balanced mix of austenitic and ferritic stainless steel phases, offering superior resistance to chloride stress corrosion and high mechanical durability.
The spools are fabricated to meet stringent industry standards such as ASTM A182 and A790, ensuring reliable performance under extreme pressure and temperature conditions. Dimensions and wall thicknesses are customizable to fit specific project requirements, and the welds are executed with precision to maintain the integrity of the duplex structure. The product range includes seamless and welded spools, with options for various end connections like flanged, beveled, or threaded, catering to diverse piping layouts.
Widely used in sectors like oil and gas, petrochemicals, and marine engineering, these duplex spools are ideal for applications involving highly corrosive fluids and seawater exposure. Their high resistance to pitting and crevice corrosion makes them suitable for subsea pipelines, heat exchangers, and process plants where reliability and longevity are paramount. Additionally, the enhanced tensile strength reduces the need for thicker walls, optimizing weight without compromising safety.
Manufacturers maintain strict quality control protocols, including non-destructive testing such as radiography and ultrasonic inspections, to ensure defect-free products ready for immediate deployment. Export readiness is supported by comprehensive documentation, including mill test certificates, material traceability, and compliance with international shipping regulations. This ensures seamless integration into global supply chains and adherence to client specifications worldwide.
Choosing a reputable supplier guarantees access to expertly engineered duplex stainless steel spools that meet the highest industrial standards. With a focus on durability, precision, and adaptability, these components provide a reliable solution for critical piping infrastructure in demanding environments across the globe.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Super Duplex Spool manufacturer 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 Super Duplex Spool manufacturer
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Super Duplex Spool manufacturer
- 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 Super Duplex Spool manufacturer
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 Super Duplex Spool manufacturer
| 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 Super Duplex Spool
- ✔ Exceptional corrosion resistance in harsh environments
- ✔ High strength-to-weight ratio for optimal performance
- ✔ Excellent weldability and fabrication capabilities
- ✔ Resistance to stress corrosion cracking and pitting
- ✔ Enhanced durability under extreme temperature conditions
- ✔ Compliance with international standards and specifications
Technical Overview of Super Duplex Spool
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Super Duplex Stainless Steel | 25% Cr, 7% Ni, 3.5% Mo, 0.5% N | Oil and gas applications, chemical processing | ASTM A790, ASTM A928 |
| Super Duplex Spool | 25% Cr, 7% Ni, 3.5% Mo, 0.5% N | Piping systems in harsh environments | ASME B16.5, ANSI/ASME B36.10 |
| Super Duplex Fittings | 25% Cr, 7% Ni, 3.5% Mo, 0.5% N | High-pressure applications, offshore platforms | API 6A, NACE MR0175 |
Specifications Table
| Material | Super Duplex Stainless Steel |
|---|---|
| Grades | UNS S32750, UNS S32760 |
| Standard | ASTM A790, ASTM A928 |
| Size Range | 1/2" to 24" Diameter |
| Length | Custom Lengths up to 12 meters |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Super Duplex 2507 | 25% Cr, 7% Ni, 4% Mo | Oil and gas, chemical processing |
| Super Duplex 32750 | 25% Cr, 6% Ni, 3.5% Mo | Desalination plants, pulp and paper industry |
| Super Duplex 32760 | 26% Cr, 7% Ni, 4% Mo | Marine applications, offshore platforms |
| Super Duplex 2205 | 22% Cr, 5% Ni, 3% Mo | Storage tanks, heat exchangers |
| Super Duplex 2505 | 25% Cr, 5% Ni, 5% Mo | High strength applications, pressure vessels |
Available Sizes of Super Duplex Spool (MM)
| Size (MM) | Size (MM) |
|---|---|
| 10 | 20 |
| 30 | 40 |
| 50 | 60 |
| 70 | 80 |
| 90 | 100 |
| 110 | 120 |
| 130 | 140 |
| 150 | 160 |
| 170 | 180 |
| 190 | 200 |
Chemical Properties of Super Duplex Stainless Steel
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 24.0 - 26.0 |
| Nickel (Ni) | 6.0 - 8.0 |
| Molybdenum (Mo) | 3.0 - 5.0 |
| Tungsten (W) | 0.5 - 1.0 |
| Iron (Fe) | Balance |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 0.8 max |
| Carbon (C) | 0.03 max |
Mechanical Properties of Super Duplex Stainless Steel (UNS S32750)
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 - 850 |
| Yield Strength (MPa) | 450 - 650 |
| Elongation (%) | 25 |
| Hardness (HB) | 250 - 320 |
| Impact Toughness (J at -40°C) | ≥ 50 |
Super Duplex – Physical & Thermal Properties
Density of Super Duplex
| Property | Metric | Imperial |
|---|---|---|
| Density | 7,800 kg/m³ | 0.28 lb/in³ |
Melting Point of Super Duplex
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1,300 - 1,400 °C | 2,372 - 2,552 °F |
Specific Heat of Super Duplex
| Specific Heat of Super Duplex | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Solid |
| 600 | 100 - 400 | Solid |
| 700 | 400 - 800 | Solid |
Electrical Resistivity of Super Duplex Steel
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.70 | 20 | As-rolled |
| 0.75 | 100 | |
| 0.80 | 200 | |
| 0.85 | 300 | |
| 0.90 | 400 | |
Equivalent of Super Duplex Stainless Steel
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A890 | 1.4501 | S32750 |
| ASTM A928 | 1.4410 | S32760 |
Manufacturing Process & Heat Treatment of Super Duplex Spool
Annealing
Annealing of super duplex stainless steel spools is performed to relieve internal stresses and improve ductility. The spools are heated to a temperature of approximately 1020-1100°C and held for a sufficient duration to allow for homogenization of the microstructure before being cooled in air. This process enhances the material's toughness and prepares it for subsequent processing.
Forging
The forging process involves shaping the super duplex stainless steel into the desired spool configuration through mechanical deformation. This is typically carried out at elevated temperatures ranging from 900°C to 1200°C to ensure optimal ductility. The forged spools are then allowed to cool gradually to room temperature, which helps in achieving the desired mechanical properties.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000-1100 | Oil or Water | To increase hardness and strength of the material. |
| Tempering | 700-800 | Air | To reduce brittleness and enhance toughness. |
| Stress Relieving | 600-700 | Air | To minimize residual stresses after forging. |
The combination of these processes ensures that super duplex spools achieve the desired mechanical properties and corrosion resistance, making them suitable for demanding applications in the oil and gas industry.
Various Types
Super Duplex Spool - Type A
- Diameter: 1 inch to 12 inches
- Condition: ASTM A790
- Applications: Oil and Gas, Chemical Processing
Super Duplex Spool - Type B
- Diameter: 1 inch to 10 inches
- Condition: Hot Rolled
- Applications: Marine Applications, Desalination
Super Duplex Spool - Type C
- Diameter: 2 inches to 8 inches
- Condition: Cold Drawn
- Applications: Power Generation, Pulp and Paper
Super Duplex Spool - Type D
- Diameter: 3 inches to 6 inches
- Condition: Pickled and Passivated
- Applications: Petrochemical, 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 Super Duplex Spool
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Super Duplex | 3 mm | $5.50 – $6.00 | ₹450 – ₹500 |
| Super Duplex | 6 mm | $5.20 – $5.70 | ₹420 – ₹480 |
| Super Duplex | 10 mm | $4.80 – $5.30 | ₹390 – ₹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 Super Duplex Spool.
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
- Super Duplex Pipe Supplier
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- Stainless Steel Spool Manufacturer
- High-Performance Alloy Pipe Manufacturer
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