Nexus Alloys & Steels is a leading manufacturer and exporter of a diverse range of U-bend tubes, available in various materials and grades. Our collection of U-bend tubes adheres to rigorous international standards such as ASTM, ASME, EN, and ISO, underscoring our commitment to quality and conformity. What sets us apart is our unwavering dedication to excellence. Each U-bend tube undergoes a comprehensive testing regimen, including 100% Eddy Current testing, 100% hydrostatic testing, and 100% Positive Material Identification (PMI) testing. These measures are taken to guarantee the exceptional quality of our products.

U-shaped tubes, commonly known as U-tubes, play a crucial role in industries that demand efficient heat transfer between two fluids. This design optimizes heat exchange while economizing on space. These specialized tubes are vital elements in constructing various heat exchangers, including those utilized for cooling seawater, condensation, heating, and reheating procedures. U-Tubes have diverse applications across sectors like Refineries, Petrochemicals, Chemicals, Oil and Gas, as well as in contexts such as handling organic and inorganic acids, hydro metallurgy, power generation, and desalination. Our primary focus revolves around establishing reliable connections between tubes and fittings to minimize the risk of leaks.

• Geometry Efficiency: The U-shaped design of U-tubes maximizes the heat transfer surface area within the limited space of the heat exchanger, enhancing thermal performance.
• Thermal Stress Relief: U-tubes allow for thermal expansion and contraction, preventing damage to the tubes and maintaining the structural integrity of the heat exchanger during temperature fluctuations.
• Flow Turbulence: The U-bend shape can induce turbulence in the fluid flow within the tubes, increasing the heat transfer coefficient and improving overall efficiency.
• Space Flexibility: U-tubes can be arranged in various configurations to suit different space constraints and heat exchange requirements in diverse industries.
• Preventing Fluid Mixing: U-tubes ensure separation between the two fluids, preventing direct mixing while facilitating efficient heat exchange through the tube walls.
• Maintenance Access: Some U-tube designs incorporate removable bundles, simplifying maintenance by allowing easy access to clean or replace tubes without major disassembly.
• Fluid Contamination Mitigation: As contaminants tend to settle at the bottom of the U-bend, they can be drained more effectively, reducing the risk of fouling and maintaining heat transfer efficiency.

• Oil and Gas Industry: U-tube heat exchangers are integral to offshore and onshore processing, handling tasks such as crude oil heating, cooling, and gas compression.
• Marine Applications: In marine environments, U-tube exchangers are used for seawater cooling systems in ships, submarines, and offshore platforms.
• Automotive Industry: U-tube exchangers contribute to engine cooling systems, ensuring efficient heat dissipation to maintain optimal engine performance.
• Pharmaceutical Industry: These heat exchangers are used for precise temperature control in pharmaceutical manufacturing, helping maintain the integrity of sensitive compounds and ensuring compliance with regulatory standards.
• Chemical Industry: U-tube exchangers play a role in chemical reactions, solvent recovery, and heating/cooling processes. Their material compatibility accommodates corrosive or reactive fluids, enhancing chemical production efficiency.
• Power Generation: In power plants, U-tube heat exchangers facilitate heat transfer between the working fluid and steam/water in boilers, condensers, and cooling systems, contributing to efficient energy conversion.

Specification:

• Size : 6mm OD to 219.08 mm OD
• Thickness : 0.6mm-10mm-Guage: 22 SWG/BWG to 10 SWG/ BWG
• Form : Round, Square, Rectangle, Coil, ‘U’ Shape
• Length : Standard length & Cut length
• Stainless Steel : Tube ASTM A-213, A-249, A269-TP 304/304H/304L, 316/316H/316U316Ti, TP 309, 310, 317L, 321,347,904 L etc.
• Low Alloy Steel Tube: ASTM A213 -T-11, T-12, T-22, T-5, T-9 etc.
• Carbon Steel Tube: BS 3059 Gr. 360 / 440, SA 179, SA / ASTM A 210 Gr. A 1
• Copper Nickel Tube : ASTM B 111, C70600 (90:10), C71500 (70:30), C71640
• Admiralty Brass Tube : ASTM B 111 C44300, C44400, C44500, C68700
• Copper & Brass Tube : ASTM B 188 C11000, C12200, C26000, C27000, C28000
• Nickel Alloy Tube: Nickel, Monel, Inconel, Alloy20 etc.
• Specialize : Capillary Tube, IBR Tubes, Copper Nickel Tube
• SMO 254: Grade UNS S31254

Certificates

• Test Certificate: Manufacturer Test Certificates per EN 10204 3.1 & 3.2

round tube – square tube – coil form