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Introduction: Why Choose Duplex & Super Duplex Pipe Systems?
Duplex and Super Duplex stainless steel pipe systems have become essential in industries requiring corrosion resistance, high strength, and long-term durability. These pipe grades combine the strength of ferritic steel with the corrosion resistance of austenitic steel.
Industries like oil and gas, desalination, marine, and chemical processing heavily rely on these materials—especially Duplex 2205 and Super Duplex 2507.
Grades of Duplex and Super Duplex Stainless Steel Pipes
Here are the common grades used in pipe systems:
| Grade | UNS Number | Typical Use |
|---|---|---|
| Duplex 2205 | UNS S32205 / S31803 | General-purpose duplex for oil, chemical & marine use |
| Super Duplex 2507 | UNS S32750 / S32760 | High-pressure, high-chloride environments |
| Duplex 2101 | UNS S32101 | Structural applications |
| Super Duplex Zeron 100 | UNS S32760 | Subsea and offshore oil & gas fields |
These materials are supplied in seamless, welded, and ERW pipe forms.
Duplex & Super Duplex Pipe Price in India
Prices can vary based on availability, quantity, size, and finish (annealed, pickled, polished). Below is an estimated price range (July 2025):
| Grade | Size | Type | Approx Price (₹/Kg) | Approx Price (₹/Meter) |
|---|---|---|---|---|
| Duplex 2205 | 1″ NB | Seamless | ₹480 – ₹600/kg | ₹750 – ₹1,200/meter |
| Super Duplex 2507 | 1″ NB | Seamless | ₹700 – ₹950/kg | ₹1,300 – ₹1,800/meter |
| Duplex 2205 | 2″ NB | Welded | ₹400 – ₹500/kg | ₹1,000 – ₹1,600/meter |
| Super Duplex 2507 | 2″ NB | Welded | ₹600 – ₹850/kg | ₹1,500 – ₹2,200/meter |
💡 Note: Prices are indicative and subject to MTC (Mill Test Certificate), quantity, and end-user specification.
Key Properties of Duplex and Super Duplex Pipes
- High Strength: About twice the yield strength of 304 or 316 stainless steel
- Excellent Corrosion Resistance: Especially in chloride-rich environments
- Stress Corrosion Cracking Resistance: Ideal for marine and chemical use
- Cost Efficient: Less nickel and molybdenum compared to austenitic steel
Applications of Duplex & Super Duplex Pipe Systems
Duplex and Super Duplex stainless steels are the top choice for:
Oil & Gas Industry
Pipelines, risers, and manifolds that deal with sour gas, chlorides, and high pressures.
Desalination Plants
Pipes used in brine transfer, evaporation, and saltwater discharge lines.
Marine & Shipbuilding
Applications include cooling water systems, exhaust systems, and ballast water management.
Power Plants & Petrochemicals
Piping for boilers, heat exchangers, and high-pressure systems.
Chemical Processing
Safe handling of caustic liquids, acids, and reactive chemical transfer.
Related Products
Looking to build a complete industrial piping system? Check these related stainless steel solutions:
- Stainless Steel Heat Exchanger Tubes
- SS Pipe Fittings – Elbows, Tees, Reducers
- Sanitary Valves – Hygienic Grade for Pharma & Food
- Stainless Steel Flanges – WNRF, SORF, Blind, etc.
- SS Tube – ASTM A213, A269 Seamless/Welded
Conclusion
Duplex 2205 and Super Duplex 2507 are indispensable in today’s high-performance industrial piping systems. They offer the perfect balance between strength, corrosion resistance, and cost efficiency.
If you’re sourcing Duplex or Super Duplex stainless steel pipes in India, trust Mahadev Dairy Pharma Fittings for quality-certified materials, MTCs, and on-time delivery.
Frequently Asked Questions (FAQs)
Q1. What is the difference between Duplex 2205 and Super Duplex 2507 pipes?
Super Duplex 2507 has higher chromium, molybdenum, and nitrogen content, making it more corrosion-resistant and stronger than Duplex 2205.
Q2. Are Duplex pipes more expensive than SS 316 pipes?
Yes, but they offer better performance in critical conditions, reducing long-term maintenance and replacement costs.
Q3. Where are Duplex and Super Duplex pipes used?
They’re used in marine, offshore, desalination, oil and gas, and chemical industries where corrosion is a major concern.
Q4. What sizes are available for Duplex and Super Duplex pipes?
Standard sizes range from ½” NB to 24″ NB, and custom sizes can be fabricated upon request.
Q5. How to identify genuine Duplex 2205 or Super Duplex 2507?
Always check the Mill Test Certificate (MTC), chemical composition, and mechanical test reports from ISO-certified manufacturers.
