Refinery Heat Exchanger TP304 U Bend Tube
TP304 U-Bend Pipes with 515MPa Tensile Strength | Hydraulic Tested & Eddy Current Inspected
1. Introduction
ASTM A213 TP304 U-tube is an austenitic stainless steel seamless tube designed for high-temperature and high-pressure equipment. It is widely used in key components such as boilers, heat exchangers, and condensers. TP304 stainless steel has excellent corrosion resistance and high-temperature strength. Its U-shaped bending structure can effectively absorb thermal expansion stress and is suitable for complex piping systems. The material complies with the ASME SA-213 standard, ensuring reliability and long life under extreme working conditions.
2. Chemical composition of TP304(%)
| Element | ASTM A213 Standard RangeA |
|---|---|
| C | ≤0.08 |
| Cr | 18.0–20.0 |
| Ni | 8.0–11.0 |
| Mn | ≤2.0 |
| Si | ≤1.0 |
| P | ≤0.045 |
| S | ≤0.030 |
3. Mechanical properties of TP304
- Tensile strength: ≥515 MPa (measured value: 520-620 MPa)
- Yield strength: ≥205 MPa (measured value: 210-310 MPa)
- Elongation (50mm gauge length): ≥35% (measured: 40-50%)
- Hardness: ≤90 HRB / ≤201 HB (typical value: 85 HRB)
- Impact toughness (-196°C): ≥100 J (meets low temperature application requirements)
4. Physical properties of TP304
| Property | Value |
|---|---|
| Density | 7.93 g/cm³ |
| Melting range | 1400–1450°C |
| Coefficient of thermal expansion (20–100°C) | 17.3 μm/m·°C |
| Thermal conductivity (100°C) | 16.2 W/m·K |
| Resistivity (20°C) | 0.72 μΩ·m |
| Modulus of elasticity | 193 GPa |
5. Application fields of TP304 U Bend Tube
- Power industry:
Supercritical power plant boiler superheater, nuclear power plant steam generator U-tube bundle.
- Petrochemical:
Heat exchange tubes of hydrogenation reactor, convection section coils of cracking furnace.
- Food and pharmaceutical:
High temperature sterilization pipelines, CIP (cleaning in place) system elbows.
- Ship and marine engineering:
Desalination plant, LNG ship low temperature pipeline.
- New energy:
Solar thermal power generation collector tube, fuel cell cooling circuit.
6. Additional instructions of TP304 U Bend Tube
Packaging: wooden box, shockproof packaging, inner wall PE film moisture-proof, port cover dustproof.
Delivery period: regular specifications are sufficient in stock, and the delivery period of customized U-tubes is 15-30 days.
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