Manufacturers and global suppliers of UNS S31500 Stainless Steel Seamless Hydraulic & Instrumentation Tubes (AISI 315), engineered for high-temperature and moderately corrosive service in petrochemical plants, refineries, power generation systems, and industrial processing facilities.
Our UNS S31500 Stainless Steel Seamless Hydraulic & Instrumentation Tubes (AISI 315)
are engineered for high-temperature, high-pressure, and moderately corrosive service
environments where superior mechanical strength, oxidation resistance, and long-term
durability are essential. The high-chromium austenitic alloy composition of
Grade UNS S31500 provides excellent resistance to scaling, thermal
fatigue, and general corrosion, making these tubes ideal for power generation,
petrochemical, and thermal processing applications.
Manufactured in compliance with ASTM A789, ASTM A213, and ASTM A269,
these seamless tubes feature uniform wall thickness and precision-finished internal
surfaces that minimize pressure loss and ensure stable, efficient flow in critical
hydraulic, pneumatic, and sensitive instrumentation systems.
Commonly used in refineries, power plants, chemical processing units, industrial heating
systems, and heavy manufacturing facilities, our UNS S31500 stainless steel seamless
tubes are fully tested and certified to international standards to deliver a
reliable, high-performance, and cost-effective solution for demanding service
environments.
Our UNS S31500 Stainless Steel Seamless Hydraulic & Instrumentation Tubes, manufactured in compliance with ASTM A789, ASTM A213, and ASTM A269, are widely supplied across major industrial cities in India, including Mumbai, Chennai, Pune, and Ahmedabad. These tubes support refineries, power generation plants, industrial heating systems, and heavy manufacturing projects requiring reliable, oxidation-resistant, and high-temperature tubing solutions.
Throughout the Middle East, we serve the UAE (Dubai, Abu Dhabi, Sharjah, Ajman, and Ras Al Khaimah), Saudi Arabia, Qatar, Kuwait, Oman, Bahrain, Iraq, Jordan, and Lebanon. Our ASTM A789 UNS S31500 seamless tubes are extensively used in oil & gas facilities, EPC projects, thermal processing units, and water treatment plants operating under elevated temperatures, pressure, and corrosive service conditions.
In Europe, our tubes are supplied to Italy, Germany, Spain, France, the United Kingdom, Turkey, Greece, Austria, and Eastern European markets, where precision engineering and thermal stability are critical. Across Africa, the Americas, and the Asia-Pacific region—including the United States, Canada, Brazil, Mexico, South Africa, Nigeria, Singapore, Malaysia, Thailand, Vietnam, and Australia—our UNS S31500 Stainless Steel Seamless Hydraulic & Instrumentation Tubes support chemical processing plants, offshore facilities, power stations, and high-temperature industrial systems.
Wherever you operate—Doha, Dubai, London, Houston, Singapore, or Sydney—Seminox Pipes & Tubes delivers premium-quality ASTM A789 UNS S31500 Stainless Steel Seamless Hydraulic & Instrumentation Tubes, supplied with EN 10204 3.1 / 3.2 certification to ensure full material traceability, regulatory compliance, and long-term performance in critical, high-temperature, and pressure-sensitive fluid control and instrumentation applications worldwide.
Manufactured using advanced cold drawing and seamless forming processes to achieve uniform wall thickness, tight dimensional tolerances, and a smooth internal bore, ensuring reliable fluid flow and precise signal transmission in critical hydraulic and instrumentation systems.
UNS S31500 (AISI 315) features elevated chromium content that enhances resistance to oxidation, scaling, and general corrosion, making these tubes suitable for high-temperature, thermally stressed, and moderately corrosive service environments.
Maintains mechanical integrity, pressure stability, and dimensional accuracy under continuous high-pressure and high-temperature operating conditions commonly found in refineries, power plants, and thermal processing systems.
Precision-finished internal surfaces minimize friction losses and pressure drop, supporting consistent flow performance and accurate measurement in sensitive instrumentation and process control applications.
Designed for easy forming, bending, and welding without compromising corrosion resistance or mechanical performance, enabling efficient installation and long-term maintenance in complex piping and instrumentation networks.
Engineered for long-term reliability and reduced maintenance in petrochemical plants, power generation facilities, offshore systems, industrial heating units, and heavy manufacturing operations exposed to heat, pressure, and corrosive process media.
UNS S31500 Stainless Steel Seamless Hydraulic & Instrumentation Tubes (AISI 315) are manufactured using precision cold drawing and cold rolling processes to achieve uniform wall thickness, tight dimensional tolerances, and superior internal surface finish. Tubes are solution annealed to restore full austenitic structure, followed by Annealed & Pickled (AP) or Bright Annealed (BA) finishing. The high-chromium alloy composition provides excellent resistance to oxidation, scaling, and thermal fatigue, ensuring long-term reliability in high-temperature and high-pressure service environments.
Each tube is subjected to comprehensive quality control procedures, including Eddy Current or Ultrasonic Testing (ECT/UT), Hydrostatic or Pneumatic Pressure Testing, Positive Material Identification (PMI), chemical composition verification, mechanical property testing (tensile, elongation, hardness), dimensional inspection, and 100% visual examination. These inspections ensure full compliance with ASTM A213, ASTM A269, and ASME SA213 / SA269 standards for safe and dependable operation in critical hydraulic, instrumentation, petrochemical, and thermal processing applications.
Manufactured under an ISO-certified quality management system and in accordance with ASTM A213, ASTM A269, ASME SA213, ASME SA269, EN 10216-5, and PED 2014/68/EU requirements. Tubes are supplied with EN 10204 3.1 / 3.2 Mill Test Certificates (MTC), ensuring full heat and batch traceability, regulatory compliance, and acceptance for EPC contractors, power generation, petrochemical, offshore, marine, and heavy industrial projects worldwide.
Partner with Seminox Pipes & Tubes for project-ready, UNS S31500 Stainless Steel Seamless Hydraulic & Instrumentation Tubes (AISI 315) manufactured to ASTM, ASME, and EN standards and supplied with EN 10204 3.1 / 3.2 Mill Test Certificates. Trusted globally for refineries, power generation, chemical processing, industrial heating, offshore and marine systems requiring high-temperature stability, oxidation resistance, and long-term reliability in critical hydraulic and instrumentation service.
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