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