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ASME SA179 Carbon Steel U Bend Boiler Tube for Pressure Vessels
This product is a high-performance piping component specifically designed for pressure vessels and heat exchange equipment. It is manufactured from cold-drawn low-carbon steel tubes (ASME SA179 standard) and precision-bent into a U-shape configuration.
The tube offers excellent thermal conductivity, pressure resistance, and fatigue strength, making it ideal for boilers, condensers, evaporators, and other high-temperature/pressure heat transfer systems. Its U-bend design effectively absorbs thermal expansion stress, reduces the number of welded joints, and enhances equipment reliability and service life.
1.Chemical & Mechanical Properties
| ASME SA179 Chemical Composition (%) |
| C | Mn | P | S | Si | Fe |
| ≤ 0.06 - 0.18% | 0.27 - 0.63% | ≤ 0.035% | ≤ 0.035% | ≥ 0.10% | Balance (≥ 98%) |
Mechanical Properties
| Component | Mechanical Performance | Key Features |
ASME SA179
Tube | · Tensile Strength: ≥325 MPa
· Yield Strength: ≥180 MPa
· Elongation (in 50mm): ≥35%
· Hardness: ≤ 72HRB | · Precision cold-drawn seamless tubing for minimum wall thickness · Thermal Conductivity: 52 W/m·K at 20°C · Superior resistance to oxidation and water corrosion · Maximum Operating Temperature: 450°C (843°F) for continuous service · Moderate strength: Suitable for low/medium-pressure heat exchangers. |
2. Product Principle
U-tubes are usually used to exchange heat in process fluids with large radiators. The fluid is pumped out through a pipe, through a U-Junction, and then flows back along a pipe parallel to the inflow line.
Heat is transferred to the wrapping material through the wall of the tube. This design is used in industrial applications where many U-tubes can be poured into oil containers with high heat capacity.
3. Key Features
- Manufactured from ASME SA179 standard low-carbon steel with excellent mechanical properties and workability
- Professional cold bending process ensures crack-free and deformation-free bends
- Optimized tube wall design for efficient heat transfer
- Capable of withstanding high-pressure working environments for long-term stable operation
- U-shape structure effectively absorbs thermal expansion stress, extending service life
- Integral forming design reduces leakage risks and improves safety
- Smooth inner and outer surface treatment reduces flow resistance
4. Key Applications
Heat exchange components for thermal power plants and industrial boilers
Pressure vessels and heat exchangers in refineries and chemical plants
- Power Generation Industry
Critical components for power plant boilers and waste heat recovery systems
Heat exchange units for large-scale central air conditioning systems
Steam heating and cooling systems in pharmaceutical processes
Heat exchange components for marine boilers and auxiliary power systems
Various industrial processing equipment requiring heat exchange
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ASME SA179 Carbon Steel U Bend Boiler Tube for Pressure Vessels Images
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