ASTM A790/ ASME SA 790 UNS S31803 pipe | Supplier Manufacturer
In today’s demanding industrial environments, material performance plays a critical role in operational safety and efficiency. ASTM A790 / ASME SA 790 UNS S31803 Pipes are widely recognized for their excellent strength, corrosion resistance, and cost-effective performance. As a reliable supplier and manufacturer, delivering high-quality UNS S31803 pipes requires precision manufacturing, strict quality control, and full compliance with international standards.
Introduction to ASTM A790 / ASME SA 790 UNS S31803
UNS S31803, commonly known as Duplex Steel 2205, is a nitrogen-enhanced duplex stainless steel with a balanced austenitic-ferritic microstructure. This dual-phase structure provides superior resistance to stress corrosion cracking while offering higher mechanical strength compared to conventional austenitic stainless steels.
ASTM A790 / ASME SA 790 specifications cover seamless and welded duplex stainless steel pipes intended for high-temperature and corrosive service applications.
Key Features of UNS S31803 Pipes
Excellent Corrosion Resistance Strong resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking.
High Mechanical Strength Nearly double the yield strength of standard austenitic stainless steels.
Seamless and Welded Options Available in various sizes, wall thicknesses, and finishing conditions.
Good Weldability and Fabrication Suitable for standard industrial welding and forming processes.
Long Service Life Reduced maintenance and operating costs over the product lifecycle.
Manufacturing Excellence and Quality Control
As an experienced ASTM A790 / ASME SA 790 UNS S31803 pipe manufacturer, production is carried out using advanced hot forming and cold finishing techniques. Each pipe is manufactured under strict quality management systems to ensure consistent performance and dimensional accuracy.
Comprehensive testing includes:
Chemical composition analysis
Mechanical testing (tensile, hardness, impact)
Hydrostatic or pneumatic pressure testing
Eddy current and ultrasonic testing
Dimensional and surface inspection
All pipes are supplied with complete test documentation in accordance with international standards.
Applications of ASTM A790 UNS S31803 Pipes
Due to their strength and corrosion resistance, UNS S31803 pipes are widely used in a variety of industries, including:
Oil and Gas Processing
Chemical and Petrochemical Industries
Offshore and Marine Engineering
Power Generation
Heat Exchangers and Pressure Vessels
Water Treatment and Desalination Plants
Why Choose a Trusted UNS S31803 Pipe Supplier Manufacturer?
Working with a reliable supplier and manufacturer ensures consistent quality, competitive pricing, timely delivery, and technical support. Reputed manufacturers maintain full traceability, comply with global export standards, and provide customized solutions to meet project-specific requirements.










