Product Description
High-Temperature Stability: Resists oxidation and creep at elevated temperatures (up to 650°C for TP347), critical for boiler tubes.
Corrosion Resistance: Austenitic grades (e.g., TP316L) withstand corrosive fluids (acids, salts) in heat exchangers.
Enhanced Heat Transfer: Seamless design and smooth surface minimize thermal resistance, optimizing heat exchange efficiency.
U-Bend Design: Eliminates the need for multiple straight tube joints, reducing leak risks and simplifying installation in compact equipment.
Chemical Composition
ASTM A213 covers various grades of stainless steel, such as TP304, TP316, etc. Here are the chemical compositions of some common grades (in wt.%):
| Grade |
C |
Mn |
Si |
P |
S |
Cr |
Ni |
Mo |
N |
Other Elements |
| TP304/304L |
≤0.08 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.030 |
18.0 - 20.0 |
8.0 - 11.0 |
- |
- |
- |
| TP316/316L |
≤0.08 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.030 |
16.0 - 18.0 |
10.0 - 14.0 |
2.0 - 3.0 |
- |
- |
| TP317/317L |
≤0.08 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.030 |
18.0 - 20.0 |
11.0 - 15.0 |
3.0 - 4.0 |
- |
- |
| TP347/347H/347HFG |
≤0.08 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.030 |
17.0 - 19.0 |
9.0 - 13.0 |
- |
- |
Nb: 0.20 |
The typical mechanical properties of some common grades are as follows:
| Grade |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
| TP304/304L |
≥515 |
≥205 |
≥35 |
| TP316/316L |
≥515 |
≥205 |
≥35 |
| TP317/317L |
≥515 |
≥205 |
≥35 |
| TP347/347H/347HFG |
≥515 |
≥205 |
≥35 |
| TP444 |
≥485 |
≥275 |
≥20 |
U-Bend Tube are widely used in Heat Exchanger Systems. Heat-Exchanger Equipment on the basis of Seamless Stainless U-Tubes and Welded Stainless U bend Tube is essential in strategically important and critical felds---Nuclear And Petrochemical Machine Building.
Applications1
- TP304/304L: Widely used in heat exchangers, chemical containers, food processing equipment, and piping systems.
- TP316/316L: Commonly used in chemical and petrochemical processing, food processing, pharmaceutical equipment, and marine applications.
- TP317/317L: Mainly used in chemical and petrochemical processing, especially for handling sulfuric acid compounds, and in the pulp and paper industry and food processing equipment.
- TP347/347H/347HFG: Suitable for high - temperature applications such as aircraft exhaust stacks and manifolds, heat exchangers, and chemical processing.
Processing of Production
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