U Bend Tube (Heat Exchangers Tube)

Datang’s heat exchanger tubes are also available in U-tube or serpentine configurations. These tubes are manufactured in compliance with various heat exchanger standards and can be customized to customer’s own specifications.

U Bend Heat Exchanger Tube Technical Specifications

• Materials: Kohlenstoffstahl, Edelstahl (304/304L, 316/316L, Duplex), Nickel Alloys, Copper-Nickel, Titanium
• Standard: ASTM A213, ASTM A179, ASTM A688, EN 10216-5, etc. ASTM A213、ASTM A179、ASTM A688、EN 10216-5
• Outer Diameter (OD)：9.5 mm to 38.1 Mm (or custom sizes upon request)
• Wall Thickness: up to 6.35mm
• Bend Radius (R): Min 1.25 OD up to to 1700mm

Why choose U-bends for your heat exchange system?

• The U-shaped design allows the pipe to expand and contract independently of the casing, eliminating the need for expansion joints.
• By bending the pipe into a continuous shape, the number of weld points is reduced by half, effectively lowering the risk of potential leaks.
• Suitable for space-constrained industrial environments, maximizing heat transfer area within a smaller casing size.

Why do U-bend tubes require heat treatment?

The bending process naturally introduces cold-working stress into the metal, which significantly increases its susceptibility to Stress Corrosion Cracking (SCC). To eliminate this risk, we perform specialized heat treatment—such as solution annealing or stress-relieving—specifically on the bent portion and its adjacent transition zones. This critical process successfully restores the metal’s original corrosion resistance and mechanical properties.