A213 GR T9, 9Cr-1Mo Finned Tube Studded Type For Fired Heater API, ASME, TEMA
Yuhong Holding Group Co., Ltd is a globally renowned manufacturer and supplier of industrial equipment, specializing in heat exchangers, fired heaters, air coolers, and related components. With an annual production capacity exceeding 6000 tons, we are dedicated to providing high-quality solutions for various industrial applications. Among our flagship products is the ASME SA213 T9 9Cr-1Mo Alloy Steel Studded Fin Tube, designed specifically for the convection section of fired heaters.
A213 T9, 9Cr-1Mo Chemical Composition and Mechanical Properties
T9, 9Cr-1Mo alloy steel is a high-temperature, creep-resistant material commonly used in fired heaters and other critical applications. Its chemical composition and mechanical properties make it ideal for handling extreme heat and pressure conditions while ensuring long-term reliability.
Chemical Composition of T9, 9Cr-1Mo
| Element | Composition (%) |
| Carbon (C) | 0.08–0.18 |
| Chromium (Cr) | 8.0–10.0 |
| Molybdenum (Mo) | 0.90–1.10 |
| Manganese (Mn) | 0.30–0.60 |
| Silicon (Si) | 0.50 max |
| Phosphorus (P) | 0.025 max |
| Sulfur (S) | 0.025 max |
Mechanical Properties of T9 9Cr-1Mo
| Property | Value |
| Tensile Strength | ≥ 415 MPa (60,000 psi) |
| Yield Strength | ≥ 205 MPa (30,000 psi) |
| Elongation | ≥ 30% |
| Maximum Operating Temperature | Up to 650°C (1202°F) |
Function of Studded Fin Tubes in the Convection Section of Fired Heaters
In the convection section of fired heaters, studded fin tubes are essential for enhancing heat transfer efficiency. The studs (or "fins") welded onto the tube surface increase the heat exchange area, allowing maximum heat recovery from flue gases to the fluid inside the tubes.
Key Features of Studded Fin Tubes in Fired Heaters:
- High Thermal Efficiency: Increased surface area for better heat absorption.
- Durability: Exceptional resistance to oxidation, corrosion, and thermal fatigue at elevated temperatures.
- Reliable Performance: Stud welding ensures a strong bond, even under demanding operating conditions.
- Reduced Maintenance: Long service life minimizes downtime and maintenance costs.
Common Parameters of Studded Fin Tubes
Studded fin tubes are precisely manufactured to meet the stringent requirements of fired heaters. Below are the typical specifications for ASME SA213 T9 9Cr-1Mo Studded Fin Tubes:
| Parameter | Specification |
| Base Tube Material | A213 T9 9Cr-1Mo Alloy Steel |
| Stud Material | Carbon Steel, Alloy Steel, Stainless Steel |
| Stud Height | 6–10 mm |
| Stud Diameter | 6–12 mm |
| Stud Pitch | 10–30 mm (customizable) |
| Manufacturing Type | Resistance Stud Welding |
| Operating Temperature | Up to 650°C (1202°F) |
Applications of Studded Fin Tubes
Studded fin tubes are versatile components used in various high-temperature applications, including:
- Fired Heaters: Specifically in convection sections for efficient heat recovery.
- Heat Exchangers: In petrochemical plants and refineries for high-temperature heat transfer.
- Boilers: Used in superheaters and reheaters for handling high-pressure steam.
- Power Plants: In waste heat recovery systems to improve energy efficiency.
- Chemical Processing: For thermal optimization in corrosive and high-temperature environments.
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A213 GR T9, 9Cr-1Mo Finned Tube Studded Type For Fired Heater API, ASME, TEMA Images
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