Products Description
Product Specifications
| Standards |
ASTM A213/ASTM A213M |
| Steel Grades | TP201 TP202 TP304 TP304L TP304H TP309S TP309H TP310S TP316 TP316L TP317 TP321 TP347 TP347H TP348 TP348H TP444 |
| Equivalent Standards | EN 10216-5, JIS G3463, DIN 17456/17458 |
| Outer Diameter (Tube) | 12.7 mm – 168 mm (0.5" – 6.6") |
| Wall Thickness (Tube) | 1.0 mm – 10 mm |
| Tube Length | 3 - 18 m, or customized |
| Fin Height | 5 mm – 30 mm |
| Fin Thickness | 0.3 mm – 1.2 mm |
| Fin Pitch | 2.5 – 8 fins/inch |
The TORICH Wrap-Around Fin Tube is made of stainless steel, offering excellent resistance to high-temperature oxidation and corrosion, effectively protecting against corrosion from sulfur dioxide, nitrogen oxides, and chloride ions in power plant flue gas.
The tube undergoes stress-relief annealing, enabling it to withstand high-frequency vibration cycles without fin cracking or detachment, making it perfectly suited for the long-term vibration operating conditions of power plant boilers.
Customized Services
- TORICH offers custom sizing services, allowing for the specification of parameters such as base tube outer diameter, wall thickness, effective heat transfer length, and fin height, thickness, and spacing.
- Services include U-tube bending, coil forming, and pre-assembled tube bundle fabrication.
- Specialized processing capabilities include non-standard length cutting, end beveling, squaring, flanging, and other custom shaping operations.
Chemical Composition
| Element | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) | Ti (%) | N (%) | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TP316 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | - | ≤0.10 | Balance |
| TP321 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 17.0–20.0 | 9.0–13.0 | - | ≥5×C (≤0.70) | ≤0.10 | Balance |
| TP310S | ≤0.08 | ≤1.50 | ≤2.00 | ≤0.045 | ≤0.030 | 24.0–26.0 | 19.0–22.0 | - | - | ≤0.10 | Balance |
Mechanical Properties
| Property | Tensile Strength | Yield Strength | Elongation | Hardness | Density | Thermal Conductivity |
|---|---|---|---|---|---|---|
| TP316 | ≥515 MPa | ≥205 MPa | ≥35% | ≤217 HBW / ≤95 HRB | 8.0 g/cm³ | 16.3 W/m·K |
| TP321 | ≥515 MPa | ≥205 MPa | ≥35% | ≤217 HBW / ≤95 HRB | 7.9 g/cm³ | 16.0 W/m·K |
| TP310S | ≥515 MPa | ≥205 MPa | ≥35% | ≤217 HBW / ≤95 HRB | 8.0 g/cm³ | 14.2 W/m·K |
Possible Alternative Grades
- Compared to 321, TP347 offers superior creep resistance, making it a common choice for high-temperature boiler components subject to long-term thermal stress.
- TP310S is suitable for extreme-temperature environments requiring high oxidation resistance, such as furnace exhaust gas recovery systems.
- When higher strength and resistance to chloride-induced corrosion are required, 2205 duplex stainless steel can be used; it is particularly well-suited for seawater cooling systems and desalination plants.
application areas
- Core heat exchange components (economizers, superheaters, and reheaters) for coal-fired power plant boilers
- Flue gas waste heat recovery systems and exhaust gas energy-saving heat exchange equipment for power plants
- Heat exchangers and cooling systems for combined-cycle units in gas-fired power plants
- Auxiliary heat exchange equipment for power plant desulfurization, denitrification, and dust removal systems
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What is a wrap-around fin tube, and how does it differ from an extruded finned tube?
A: A wrap-around finned tube is produced by helically winding a metal strip under tension around a base tube, creating a tight bond through mechanical interlocking (L, LL, or KL types) or high-frequency welding.
Q: What is the maximum length available for your finned tubes?
A: The standard maximum shipping length for straight tubes is 18 meters. Please contact us if you require longer fixed lengths or U-shaped tubes; we can assess the tooling requirements to accommodate special lengths or formed tube deliveries.
Q: What specialized surface treatment processes are available to meet the anti-fouling and anti-corrosion needs of power plants?
A: We offer customized treatments such as pickling and passivation, mechanical polishing, high-temperature anti-corrosion coatings, and anti-fouling/anti-ash-accumulation coatings.
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