Detail Information

Processing Service:	Bending Cutting Welding Punching	Inner Diameter:	6-2500mm(as Required)
Payment Term:	30%T/T Advance + 70% Balance	Type:	Seamless, Welded
Model No:	S31400 S31803 S32205	Wall Thickness:	0.5mm To 20mm
Yield Strength:	205-310 MPa	Connection:	Welding
Sgs:	Available	Alloy Or Not:	Is Alloy
Welding Line Type:	Seamless	Production Capacity:	50000ton/Month
Temperature Resistance:	Up To 870°C (depending On Grade)	Warranty:	1 Year
Tensile Strength:	520-750 MPa
Highlight:	99.8% Pure Aluminium Ingot , Pure Aluminium Ingot Factory

Product Description

Corrosion Resistant Duplex Steel Pipes are high-performance tubular products engineered for the most demanding industrial environments. By integrating a balanced microstructure of austenite and ferrite phases, these pipes deliver exceptional strength and superior resistance to a wide range of corrosive media, including chlorides, acids, and caustic solutions. The unique dual-phase structure is the core differentiator, setting Corrosion Resistant Duplex Steel Pipes apart from conventional stainless steel grades. They are the optimal solution for critical applications where failure is not an option, offering an outstanding combination of longevity, mechanical robustness, and cost-effectiveness over the entire lifecycle.

Product Characteristics & Advantages:

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Exceptional Strength: Possesses over double the yield strength of standard austenitic stainless steels (e.g., 304, 316), allowing for reduced wall thickness and material savings.
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Superior Corrosion Resistance: Offers excellent resistance to stress corrosion cracking (SCC), pitting, and crevice corrosion, particularly in chloride-containing environments.
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Economic Efficiency: The high strength-to-weight ratio and enhanced durability translate to lower lifetime costs despite a higher initial investment compared to standard grades.
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Good Weldability & Fabrication: Can be welded and fabricated using standard procedures, ensuring ease of installation and integration into existing systems.

Technology & Manufacturing:

Corrosion Resistant Duplex Steel Pipes are produced through a precisely controlled process. It begins with melting in electric arc or AOD (Argon Oxygen Decarburization) furnaces to achieve precise chemistry. The material is then formed into pipes via extrusion or seamless piercing methods, followed by a critical solution annealing and rapid quenching heat treatment. This process dissolves deleterious phases and secures the ideal 50/50 austenite-ferrite balance, which is essential for the performance of Duplex Steel Pipes. Advanced non-destructive testing (NDT) ensures integrity throughout production.

Typical Applications:

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Oil & Gas: Subsea flow lines, process piping, topside piping.
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Chemical & Petrochemical: Reactors, heat exchangers, effluent treatment plants.
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Desalination & Water Treatment: High-pressure RO (Reverse Osmosis) piping, brine lines.
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Pulp & Paper Industry: Digester preheater lines, bleach plant equipment.
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Marine & Offshore: Seawater cooling systems, firewater piping.

Property / Parameter	Value / Standard (Typical)
Common Grades	S31803 / S32205 (UNS), 1.4462 (EN)
Density	~7.8 g/cm³
Yield Strength (min)	450 MPa (65 ksi)
Tensile Strength (min)	620 MPa (90 ksi)
Pitting Resistance (PREN)	≥ 35
Main Standards	ASTM A790, A928; EN 10216-5

Key Selling Points:

The primary advantage of Corrosion Resistant Duplex Steel Pipes lies in their unmatched synergy of strength and corrosion resistance. This dual capability makes them a versatile and reliable choice, reducing maintenance frequency and mitigating the risk of unexpected downtime. Furthermore, their lighter potential weight contributes to easier handling and potential structural support savings in large-scale projects.

Service & Support:

We provide comprehensive technical data sheets, material test certificates (3.1 or 3.2 per EN 10204), and application-specific guidance. Our Corrosion Resistant Duplex Steel Pipes are available in a range of sizes, schedules, and can be supplied as seamless or welded, with ends prepared as per project requirements.

FAQ:

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Q: What is the temperature limit for Duplex Steel Pipes?

A: Standard Duplex 2205 pipes are typically recommended for continuous service up to approximately 300°C (572°F) to avoid embrittlement.
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Q: How do I weld Duplex Steel Pipes correctly?

A: Welding requires controlled heat input and the use of matching or over-alloyed duplex filler metals to maintain the corrosion resistance and phase balance in the weld zone. Specific WPS (Welding Procedure Specification) should be followed.
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Q: What is the difference between S31803 and S32205?

A: Both are standard duplex grades. S32205 typically has tighter chemical composition controls, especially for nitrogen, ensuring more consistent and slightly improved properties compared to S31803.

Tag:

Place of Origin:	CHINA WUXI
Brand Name:	Jiangsu China Steel Union
Certification:	ISO9001,SGS, ASTM, ASME
Model Number:	SS304,SS316L,SS321,SS310S,SS2205,SS304H

Minimum Order Quantity:	1000KG
Price:	1.3-3.6USD/KG
Packaging Details:	Steel strip + kraft paper + fumigated wooden box export exquisite packaging
Delivery Time:	3-5Days
Payment Terms:	T/T, L/C, Western Union, MoneyGram
Supply Ability:	2 metric tons per month

Corrosion Resistant Duplex Steel Pipes, High Strength, EN 10216

99.8% Pure Aluminium Ingot

Pure Aluminium Ingot Factory

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