UNS S31500 Stainless Steel Seamless ‘U’-Tubes

Manufacturers of UNS S31500 Stainless Steel Seamless ‘U’-Tubes designed for high strength, excellent corrosion resistance, and superior performance in heat exchangers, condensers, boilers, and demanding industrial applications.

ISO 9001:2015 • ISO 14001:2015 • ISO 45001:2018 • PED 2014/68/EU Certified

UNS S31500 Stainless Steel Seamless ‘U’-Tubes

Our UNS S31500 Stainless Steel Seamless ‘U’-Tubes are engineered for demanding industrial environments where high mechanical strength, superior corrosion resistance, and long-term reliability are essential. Manufactured from duplex stainless steel, UNS S31500 combines the benefits of austenitic and ferritic microstructures, delivering excellent resistance to pitting, crevice corrosion, and stress corrosion cracking—especially in chloride-rich conditions.

The seamless construction ensures uniform wall thickness, enhanced pressure resistance, and leak-free performance. Precision-formed ‘U’-bend geometry improves heat transfer efficiency while optimizing space utilization in compact heat exchanger systems.

Widely used in oil & gas, petrochemical, chemical processing, power generation, and desalination industries, our UNS S31500 seamless ‘U’-tubes undergo stringent quality control and testing to meet international standards. These tubes provide a cost-effective, durable solution for high-pressure and high-temperature applications, ensuring reliable and efficient long-term operation.

UNS S31500 Stainless Steel Seamless U-Tubes

Comprehensive Global Reach

Our 304LN Stainless Steel Seamless ‘U’-Tubes are supplied across India, including Mumbai and other major industrial hubs, supporting critical sectors such as power generation, petrochemicals, refineries, pharmaceuticals, and food processing industries.

In the Middle East, we serve Iraq, Kuwait, Jordan, Lebanon, Saudi Arabia, Yemen, Oman, and the UAE—covering Abu Dhabi, Dubai, Al Ain, Ajman, Sharjah, and Ras Al Khaimah—where enhanced strength and corrosion resistance are essential for energy, water treatment, and infrastructure projects.

We are also a trusted supplier in Qatar (Doha), Bahrain, Syria, Azerbaijan, and Georgia, where industries rely on 304LN stainless steel U-tubes for their excellent resistance to sensitization, improved mechanical strength, and long-term operational reliability.

Across Europe, our products are delivered to Italy, Spain, Germany, the United Kingdom, France, Greece, Austria, Turkey, Russia, Ukraine, and Kazakhstan, supporting advanced manufacturing, construction, and process industries.

Africa, Americas & Asia-Pacific

In Africa, industries in Morocco, Algeria, Libya, Egypt, Nigeria, Sudan, Chad, Senegal, Kenya, Somalia, Zambia, South Africa, and Namibia depend on our tubes for reliable performance in corrosive and demanding environments.

In the Americas, our 304LN Seamless ‘U’-Tubes are supplied to the United States, Canada, Mexico, Brazil, and Argentina, supporting oil & gas, chemical processing, construction, and manufacturing sectors.

Our reach extends throughout the Asia-Pacific region, including Sri Lanka, Malaysia, Singapore, Philippines, Thailand, and Vietnam, where high-performance stainless steel tubes are essential for industrial growth.

Commitment to Quality

Wherever your project is located—whether in Doha, Dubai, London, Moscow, or New York—Seminox Pipes & Tubes delivers premium 304LN Stainless Steel Seamless ‘U’-Tubes, manufactured in strict compliance with international standards.

Our global presence reflects the trust industries place in our ability to supply durable, high-quality solutions engineered for demanding service conditions worldwide.

Key Features of UNS S31500 Stainless Steel Seamless ‘U’-Tubes

Duplex Stainless Steel Grade

UNS S31500 is a duplex stainless steel combining austenitic and ferritic structures, offering superior strength and corrosion resistance.

High Mechanical Strength

Provides nearly twice the yield strength of standard austenitic stainless steels, making it ideal for high-pressure applications.

Seamless Tube Construction

Manufactured without welding to ensure uniform wall thickness, excellent pressure resistance, and leak-free performance.

Precision U-Bend Engineering

Accurately formed U-bends with controlled radii ensure efficient heat transfer and easy installation in heat exchanger systems.

Outstanding Corrosion Resistance

Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-rich and aggressive environments.

Extended Service Life

Strict quality control and advanced testing ensure long-term reliability, reduced maintenance, and consistent performance.

Product Specification

Outside Diameter
12.70 mm to 50.80 mm
Wall Thickness
0.89 mm to 5.00 mm
Grades
TP-304, 304L, 304H, 304N, 304LN, 316, 316L, 316H, 316Ti, 316N, 316LN, 310, 317, 317L, 321, 321H, 347, 347H, UNS S31260, 31500, 31803, 32205, 32304, 32750, 32760, TP-405, 410
Specifications
ASTM, ASME, DIN EN, JIS (Japan), NF (AFNOR) & as per customer drawing
Length
Up to 30 meters
Applications
LP / HP Heaters, Fertilizer, Power Plant, Petrochemical & Refinery, Airfin Cooler, Nuclear Power Plant

Manufacturing, Testing & Quality Assurance

Advanced Duplex Manufacturing

UNS S31500 Stainless Steel Seamless ‘U’-Tubes are manufactured using advanced seamless tube production and precision U-bending processes. The duplex stainless steel structure provides excellent strength, uniform wall thickness, and superior resistance to corrosion and mechanical stress.

Comprehensive Inspection & Testing

Each U-tube undergoes Eddy Current Testing, Hydrostatic Pressure Testing, Positive Material Identification (PMI), dimensional inspection, and detailed visual examination to ensure defect-free performance under high-pressure and corrosive service conditions.

Certifications & Global Compliance

Manufactured in compliance with ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and PED 2014/68/EU, ensuring adherence to international quality, safety, and pressure equipment standards.

Typical Applications

Heat Exchangers & Thermal Systems
Condensers & Cooling Units
Power Generation & Utility Plants
Petrochemical & Refinery Operations
Chemical & Fertilizer Processing Plants
Nuclear Power & Critical Energy Facilities
Air Fin Coolers & HVAC Systems
Boilers, Pressure Vessels & Heaters
General Process & Industrial Manufacturing

Looking for UNS S31500 Stainless Steel Seamless ‘U’-Tubes?

Contact Seminox Pipes & Tubes for expert technical guidance, competitive pricing, and dependable global supply of high-quality UNS S31500 stainless steel seamless ‘U’-tubes engineered for demanding heat transfer, petrochemical, oil & gas, and power industry applications.

Get in Touch

Phone Number

022 6659 5296
+91 9987403801
+918433943801

Email

domestic@seminoxpipes.com
export@seminoxpipes.com

Address

1219 / 1220, 12th Floor, Prasad Chambers, Girgaon, Mumbai- 400004

Business Hours

Monday — Friday 9am – 5pm
Saturday — 10am – 3pm
Sunday — Closed

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