UNS S31803 / S32205 Duplex Stainless Steel Pipe 25mm Diameter – High Strength Corrosion-Resistant Industrial Pipe
Introduction:
The 25mm diameter duplex stainless steel pipe made from UNS S31803 / S32205 grades offers a perfect combination of high strength and exceptional corrosion resistance. Engineered for demanding industrial environments, these duplex stainless steel pipes are widely used in chemical, petrochemical, desalination, and offshore applications where both mechanical strength and resistance to chloride-induced stress corrosion are critical. Its duplex structure, combining austenitic and ferritic phases, ensures enhanced toughness, superior performance under pressure, and resistance to pitting and crevice corrosion.
Material Table:
Material Grade Description Key Properties
UNS S31803 Duplex stainless steel Excellent corrosion resistance, high tensile strength, ideal for general chemical and industrial use
UNS S32205 Super duplex stainless steel Enhanced corrosion resistance in chloride environments, higher strength and toughness, suitable for seawater and offshore applications
Specifications Table:
Parameter Value / Range
Material UNS S31803 / S32205
Pipe Type Seamless / Welded
Outer Diameter (OD) 25mm
Wall Thickness (WT) 2mm – 6mm
Length 6m / 12m
Surface Finish Pickled & Passivated / Polished
Connection Type Butt-welded / Flanged
Pressure Rating Up to 100 bar (depending on schedule)
Manufacturing Process Table:
Step Description
Raw Material Selection Premium duplex stainless steel billets or plates
Forming Hot or cold forming into pipe shape
Welding TIG / MIG welding for strong, leak-proof joints
Heat Treatment Solution annealing to enhance corrosion resistance and toughness
Surface Treatment Pickling and passivation for corrosion resistance and smooth finish
Inspection & Testing Hydrostatic, ultrasonic, and dimensional checks
Packaging Protective packaging for safe delivery
Uses / Applications Table:
Industry / Application Description
Chemical Industry Transport of acids, alkalis, and corrosive chemicals
Petrochemical Industry High-pressure pipelines and process systems
Offshore & Marine Seawater piping, desalination plants, and offshore platforms
Power Generation Piping for heat exchangers, condensers, and cooling systems
Food & Beverage Industry Hygienic piping systems for process fluids
Advantages:
High Strength: Can handle high-pressure industrial applications.
Superior Corrosion Resistance: Especially effective in chloride-rich and harsh chemical environments.
Durable & Long-Lasting: Reduces maintenance and increases service life.
Excellent Toughness: Performs well in low-temperature and high-stress conditions.
Versatile Applications: Suitable for chemical, petrochemical, offshore, and industrial fluid transport.
FAQ:
Q: Can this pipe be used for seawater applications?
A: Yes, UNS S32205 super duplex stainless steel offers excellent resistance to seawater corrosion.
Q: Are custom lengths and wall thicknesses available?
A: Yes, both wall thickness and length can be tailored to project requirements.
Q: Can it withstand high-pressure pipelines?
A: Absolutely, duplex stainless steel is designed for high-pressure industrial systems.
Q: How is quality ensured?
A: Pipes undergo hydrostatic, ultrasonic, and dimensional inspections in compliance with ASTM and ASME standards.
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The 25mm UNS S31803 / S32205 duplex stainless steel pipe offers high strength, excellent corrosion resistance, and long-lasting durability, making it an ideal choice for chemical, petrochemical, offshore, and industrial fluid transport applications.