ASTM A213 TP304L Stainless Steel U Bend Tube For Heat Exchanger
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ASTM A213 TP304L Stainless Steel U Bend Tube for a Heat Exchanger is a seamless stainless steel tube manufactured to the ASTM A213 standard, made from TP304L austenitic stainless steel, bent into a U-shape, and used in heat exchangers for its high corrosion resistance, heat resistance, and efficient heat transfer properties. The TP304L grade has a low carbon content (L-grade), which provides enhanced corrosion resistance against sensitization, making it suitable for high-temperature and high-pressure applications in industries like petrochemicals, power generation, and food processing.
Advantages of ASTM A213 TP304L Stainless Steel U-Bend Tubes for Heat Exchangers
High-Temperature Performance：Designed for elevated temperatures, these U-bend tubes maintain structural integrity and corrosion resistance in continuous service up to 850–900°C (1562–1652°F), making them ideal for steam condensation and thermal oil systems.
Seamless Construction & Precision Bending：Manufactured using a seamless process and precision cold bending techniques (with mandrel support to minimize wall thinning and ovality), ensuring uniform wall thickness, smooth bends, and reliable performance under thermal cycling.
Thermal Expansion Compatibility：The U-bend design allows natural expansion and contraction of the tube bundle relative to the tube sheet or shell without inducing stress, critical for long-term reliability in high-temperature cycling operations.
ASTM A213 TP304L Stainless Steel U Bend Tube Specifications:
Standard: ASTM A213
Grade: TP304L
Manufacturing Process: Seamless or welded
Surface Finish: Annealed, pickled, or polished
Bend Radius: Customizable based on the application
Dimensions: Outer diameter, wall thickness, and length as per customer requirements.
ASTM A213 TP304L Stainless Steel U Bend Tube Chemical Composition
| Element | TP304, % | TP304L, % |
|---|---|---|
| C | ≤0.08 | ≤0.035 |
| Mn | ≤2.00 | ≤2.00 |
| P | ≤0.045 | ≤0.045 |
| S | ≤0.030 | ≤0.030 |
| Si | ≤1.00 | ≤1.00 |
| Cr | 18.0-20.0 | 18.0-20.0 |
| Ni | 8.0-11.0 | 8.0-12.0 |
Mechanical Properties of TP304L Stainless Steel pipe
| Property | Value |
|---|---|
| Tensile Strength (UTS) | ≥ 485 MPa (70,000 psi) |
| Yield Strength (0.2% offset) | ≥ 170 MPa (25,000 psi) |
| Elongation (in 50 mm) | ≥ 35% |
| Hardness | ≤ 90 HRB (Rockwell B) |
| Modulus of Elasticity | ~193 GPa (~28,000 ksi) |
| Density | ~8.0 g/cm³ (~0.289 lb/in³) |
| Melting Point | ~1400–1450 °C (~2550–2650 °F) |
Applications:
ASTM A213 TP304L stainless steel pipes are widely used in heat exchangers, condensers, evaporators, and oil systems in industries such as power generation, petrochemical, and HVAC, where corrosion resistance, thermal stability, and leak-free performance are critical.
Test Required Bend U tube
1.Corrosion Test
2.Chemical Analysis
3.Mechanical Tests: Flattening test, Flaring test, Flange test, Hardness Test and Hydrostatic test
4.Reverse-bend and Re. flat tests
5.Eddy Current Testing
6.Hydrostatic Testing
7.Air Under Pressure Test
8.Visual Inspection
Test Required Bend U tube
If you want to know more details and prices of the products, please contact us in time! Email: info@gneestainless.com
GNEE Stainless Steel is a specialized manufacturer of Stainless Steel U Bend Tube / Stainless Steel U bent Tubes for U Tube Heat Exchanger (U bent Stainless Steel Tube for U bent Tube Heat Exchanger). Our U Bend Tube Tube-bending production line, installed in 2008. Solution annealing after bending will be processed to lower the residual stress, and followed by Hydrostatic testing/Pneumatic test and Dye Penetrant testing if required.
Our Stainless Steel U bend Tube / U bent Stainless Steel tubes included ASTM A213 ASME SA213 TP304 TP304L TP304H TP316 TP316L TP316Ti TP317 TP317L TP317LMN TP321 TP321H TP347H TP309S TP310S TP310H 904L N08904 254SMo S31254, ASME SA789 S31803 S32205 S32750 S32304 S32760 S32101.
Fully compliant with ASTM A213/ASME SA213 standards, with options for mill test certificates (EN 10204 3.1) and third-party inspection reports to ensure traceability and adherence to international quality requirements.
PACKAGING
All tubing shall be packaged and blocked in such a manner as to prevent damage in ordinary handling and transportation. The boxes shall be constructed in such a manner that no nails, staples, screws, or similar fasteners are required to close and secure the box after the tubes have been placed in the box. The box shall be lined with plastic sheet or vapor barrier materials so as to prevent chloride contamination of the tube during handling, transportation, and storage.
