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| Brand Name: | YUHONG |
| Model Number: | Carbon Steel U bend tube |
| MOQ: | 500 KGS |
| Price: | Negotiable |
| Delivery Time: | Depends on order quantity |
| Payment Terms: | T/T, L/C AT SIGHT |
Overview of U Bend Tube
U-shaped tubes in industrial boilers are primarily used in applications requiring resistance to drastic temperature fluctuations, significant temperature differentials, and extremely high demands for thermal expansion compensation. The Heat Recovery Steam Generator (HRSG) represents their most typical application domain, especially in high-temperature or large-differential components such as superheaters, reheaters, and economizers. Secondly, they are employed in chemical process waste heat boilers to address issues of corrosion, scaling, and temperature differentials.
Why Carbon Steel is Used for Boiler Tubes:
Good thermal conductivity
Cost-effective
Easily formable into U-bends
Sufficient for temperatures up to ~425°C (800°F) in low-to-medium duty applications
Common carbon steel grades: ASTM A179, A192, A210
Advantages of Carbon Steel U-Bend Tubes:
1. Cost-Effective
Carbon steel is less expensive than stainless steel or alloy steel.
Ideal for applications where corrosion resistance is not a primary concern.
2. Good Mechanical Strength
High tensile and yield strength.
Withstands moderate pressure and temperature, making it suitable for low to medium-pressure boilers and heat exchangers.
3. Thermal Expansion Compensation
The U-shape design allows for thermal expansion and contraction without introducing significant stress into the tube system.
Reduces the risk of cracking or leakage over time.
4. Compact Design
U-bending allows for more tube length in a confined space.
Helps in designing compact and efficient heat exchanger bundles.
5. Efficient Heat Transfer
Carbon steel has good thermal conductivity.
Ensures effective heat exchange when operating within its thermal limits.
6. Ease of Fabrication and Welding
Carbon steel is easier to bend, form, and weld than many alloy steels.
Bending and post-bend heat treatment (stress relief) are well-established processes.
7. Wide Availability
Common grades like ASTM A179, A192, and A210 are readily available worldwide.
Suitable for standard specifications in power plants, refineries, and industrial facilities.
Key Features of Carbon Steel U-Bend Tubes
| Feature | Description |
|---|---|
| Material | Carbon Steel (e.g., ASTM A179, A192, A210, A106 etc.) |
| Bend Shape | U-shaped (typically 180° bend) |
| Bend Radius | Can be tight or long radius, depending on the application |
| Tube OD Range | Common sizes: 6.35 mm to 101.6 mm (¼" to 4") |
| Wall Thickness | As per standard or customer requirement |
| Length | Varies – straight leg lengths are usually specified by customer |
| Heat Treatment | Stress relief after bending, especially for tight-radius bends |
| Surface Finish | Pickled, passivated, or coated as required |
Common application of Carbon Steel U Bend Tube
Shell and Tube Heat Exchangers
Waste Heat Recovery Boilers (WHRB)
Fire-Tube Boilers
Low-Pressure Industrial Boilers
Water-Tube Boilers (Economizer or Preheater Sections)
