Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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Alloy Steel Seamless Pipe, ASME SA335 P9, Solid Fin Tube, For HRSG System
ASME SA335 P9 Solid Fin Tube is fabricated using ferritic alloy steel seamless pipe, with solid fins made of carbon or alloy steel welded by High Frequency Welding (HFW). These finned tubes are specially designed for Heat Recovery Steam Generator (HRSG) systems in combined-cycle power plants, offering superior performance under high temperature and pressure conditions.
| Element | Content (%) |
|---|---|
| C | 0.15 – 0.25 |
| Mn | 0.30 – 0.60 |
| P | ≤ 0.025 |
| S | ≤ 0.025 |
| Si | 0.50 – 1.00 |
| Cr | 8.00 – 10.00 |
| Mo | 0.90 – 1.10 |
| Property | Value |
|---|---|
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 30% |
| Working Temp. | Up to 600–620°C |
| Pressure Rating | High pressure suitability |
High Temperature Resistance
Chromium-Molybdenum composition ensures stability at elevated temperatures.
Enhanced Heat Transfer
Solid fin design increases external surface area, improving energy recovery in HRSGs.
High Strength Under Pressure
Alloy steel withstands thermal cycling and high-pressure steam environments.
Corrosion & Oxidation Resistance
Excellent resistance to oxidation and scaling in boiler exhaust gas atmospheres.
Long Service Life
Reliable performance over extended operation cycles in harsh boiler conditions.
Used primarily in Heat Recovery Steam Generator (HRSG) systems, especially in:
Combined-Cycle Power Plants
Gas Turbine Exhaust Recovery
Waste Heat Boilers
Superheater and Reheater Sections
Industrial Steam Recovery Units
Typically installed in superheater, reheater, or evaporator sections of HRSGs where high thermal efficiency and long operational life are required.
