A213/SA213 TP304L Bright Annealed (BA) Seamless Tube, Stainless Steel Heat Exchanger U Bend Tube

A213/SA213 TP304L Bright Annealed U-Bend Tube Overview

A213/SA213 TP304L Bright Annealed U-bend tubes are high-performance stainless steel tubes manufactured to ASTM A213/ASME SA213 standards using TP304L material—an austenitic stainless steel with low carbon content. These tubes undergo a bright annealing process in a controlled atmosphere to achieve a smooth, reflective surface finish and enhanced corrosion resistance.

The U-bend shape is specifically designed for use in heat exchangers, condensers, and boilers, where fluid direction changes within a compact footprint. The combination of TP304L's excellent weldability and corrosion resistance makes these tubes ideal for high-temperature and corrosive environments in industries such as petrochemical, power generation, and marine engineering.

Chemical Composition of SS304L (UNS S30403)

Mechanical Properties of SS304L (UNS S30403)

1. Key Features

· Material: TP304L (UNS S30403) – low carbon version of 304 stainless steel

· Process: Seamless, cold-worked, and bright annealed

· Finish: Bright, smooth, oxide-free internal and external surface

· Bend Radius: Customizable (typically 1.5×OD, 2×OD, etc.)

· Standards: ASTM A213 / ASME SA213

· Size Range: OD 6–38 mm; WT 0.5–3.0 mm; Lengths up to 30 meters (straight) before bending

2. Why Choose Bright Annealed (BA) tubes instead of Pickled Annealed (PA) tubes?

    Choose Bright Annealed tubes when:

· You need high surface quality and cleanliness

· Corrosion resistance is a priority in critical environments

· Applications demand tight tolerances and aesthetics

Pickled annealed tubes are fine for more general-purpose industrial applications where surface finish isn't as critical.

3. Advantages

· Superior corrosion resistance, especially in chloride and acidic environments

· Smooth internal surface enhances fluid flow and reduces scaling

· High dimensional accuracy and mechanical strength

· Suitable for high-purity and high-temperature applications

4. Applications

· Heat exchangers

· Condensers

· Boilers and superheaters

· Power generation and petrochemical plants

· Pharmaceutical and food processing equipment