Manufacturers and suppliers of ASTM A789 Duplex Stainless Steel Seamless Heat Exchanger Tubes, engineered for offshore, marine, chemical processing, desalination, and chloride-rich service environments.
Our ASTM A789 Duplex Stainless Steel Seamless Heat Exchanger Tubes
are engineered for demanding industrial environments where high mechanical strength,
superior corrosion resistance, and long-term reliability are essential.
ASTM A789 covers duplex stainless steel tubing grades such as
UNS S31803, UNS S32205, and UNS S32750, which combine the toughness
of austenitic steel with the strength of ferritic steel for enhanced performance
in aggressive and high-pressure service conditions.
The seamless, high-precision construction ensures uniform wall thickness and smooth
internal surfaces, reducing pressure loss and maximizing heat transfer efficiency
in critical systems. These tubes offer excellent resistance to pitting, crevice
corrosion, and stress corrosion cracking in chloride-rich and marine environments.
Widely used in oil & gas, chemical processing, desalination, offshore platforms,
power generation, and marine piping systems, our ASTM A789 seamless tubes are
manufactured and tested to meet international standards, delivering a durable,
high-performance, and cost-effective solution for harsh operating conditions.
Our ASTM A789 Duplex Stainless Steel Seamless Heat Exchanger Tubes are trusted across major industrial cities in India and throughout the Middle East, including the UAE, Saudi Arabia, Qatar, Kuwait, Oman, and Bahrain, supporting oil & gas, chemical processing, power generation, desalination, and large-scale infrastructure and EPC projects.
In Europe, we supply Italy, Germany, Spain, the United Kingdom, France, Turkey, and Eastern European markets, where our ASTM A789 duplex tubes are valued for high mechanical strength, superior corrosion resistance, and reliable performance in demanding chemical, marine, and high-temperature service environments.
Across Africa, the Americas, and the Asia-Pacific region, our ASTM A789 stainless steel seamless tubes support marine, chemical processing, power generation, offshore platforms, and heavy manufacturing industries, delivering dependable performance in corrosive, high-pressure, and extreme operating conditions.
Wherever you operate—Doha, Dubai, London, Houston, or Singapore—Seminox Pipes & Tubes delivers premium-quality ASTM A789 Duplex Stainless Steel Seamless High Precision & Heat Exchanger Tubes, manufactured and certified to international standards for durability, traceability, and long-term performance in critical service applications.
Produced in accordance with ASTM A789 specifications to ensure uniform wall thickness, tight dimensional tolerances, and smooth internal surfaces for optimized fluid flow and consistent heat transfer performance.
Duplex stainless steel grades such as UNS S31803 and UNS S32205 provide excellent resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking in aggressive chemical and marine environments.
Delivers significantly higher yield and tensile strength than conventional austenitic stainless steels, enabling safe operation under high pressure, thermal cycling, and heavy-duty service conditions.
Smooth bore finish and consistent metallurgy enhance thermal conductivity, minimize fouling, and improve overall efficiency in heat exchangers, condensers, and boiler systems.
Engineered to perform reliably in chloride-rich, high-temperature, and high-pressure environments, improving system safety and long-term operational stability.
Designed for extended durability, reduced maintenance, and superior performance in offshore, oil & gas, desalination, chemical processing, and power generation applications.
UNS S31803 / UNS S32205 Duplex Stainless Steel Seamless Tubes are produced using precision hot extrusion and cold drawing processes, followed by controlled solution annealing and pickling. This ensures a balanced duplex microstructure with high mechanical strength, excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, and consistent dimensional accuracy for critical heat exchanger, offshore, marine, and high-pressure service applications.
Each tube is subjected to rigorous quality control procedures including Eddy Current Testing (ECT), Hydrostatic Pressure Testing, Positive Material Identification (PMI), chemical analysis, mechanical testing, dimensional verification, and 100% visual inspection. These measures ensure compliance with ASTM A789 / ASME SA789 requirements and reliable performance in corrosive, high-temperature, and high-stress operating environments.
Manufactured in accordance with ASTM A789 / A790, ASME SA789 / SA790, EN 10216-5, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and PED 2014/68/EU directives. Tubes are supplied with EN 10204 3.1 / 3.2 Mill Test Certificates (MTC), ensuring full material traceability, regulatory compliance, and acceptance for EPC, oil & gas, offshore, and desalination projects.
Partner with Seminox Pipes & Tubes for certified, project-ready UNS S31803 Duplex Stainless Steel Seamless High Precision & Heat Exchanger Tubes manufactured to ASTM A789 / ASME SA789 / EN 10216-5 standards and supplied with EN 10204 3.1 / 3.2 MTC. Trusted worldwide for oil & gas, offshore, marine, desalination, chemical processing, and chloride-rich service environments requiring high strength, superior corrosion resistance, and long-term operational reliability.
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