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| Brand Name: | YUHONG |
| Model Number: | TP347H/18Cr-10Ni-Nb |
| MOQ: | 500KGS |
| Price: | Negotiable |
| Delivery Time: | Depends on order quantity |
| Payment Terms: | T/T, L/C AT SIGHT |
TP347H 18Cr-10Ni-Nb Austentic Stainless Steel Fin Tube for Fired Heater API560
Yuhong Holding Group Co., Ltd is a globally recognized manufacturer and supplier of industrial equipment, specializing in heat exchangers, fired heaters, air coolers, and related components. With a production capacity exceeding 6000 tons annually, we are committed to delivering high-quality solutions for diverse industries. Among our flagship products is the TP347H 18Cr-10Ni-Nb Austenitic Stainless Steel Fin Tube, specifically designed for the convection section of fired heaters in compliance with API 560 standards.
1. 18Cr-10Ni-Nb (TP347H) Chemical Composition and Mechanical Properties
TP347H is an austenitic stainless steel stabilized with niobium (Nb), making it highly resistant to sensitization and intergranular corrosion. It is widely used in high-temperature applications due to its excellent creep strength and oxidation resistance.
Chemical Composition of TP347H (18Cr-10Ni-Nb)
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.04–0.10 |
| Chromium (Cr) | 17.0–19.0 |
| Nickel (Ni) | 9.0–13.0 |
| Niobium (Nb) | 8 × C min, ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 0.75 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Nitrogen (N) | ≤ 0.10 |
Mechanical Properties of TP347H
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa (74,700 psi) |
| Yield Strength | ≥ 205 MPa (29,700 psi) |
| Elongation | ≥ 35% |
| Maximum Operating Temperature | 650°C (1202°F) |
2. Function of Fin Tubes in the Convection Section of Fired Heaters
In fired heaters, the convection section plays a critical role in improving thermal efficiency by recovering heat from flue gases. TP347H HFW fin tubes are ideal for this application due to their excellent high-temperature and corrosion resistance. The fins enhance the heat transfer surface area, allowing for efficient heat exchange between the flue gases and the fluid inside the tubes.
Key benefits of using TP347H fin tubes in the convection section include:
3. Common Fin Tube Parameters
High-frequency welded (HFW) fin tubes are manufactured with precise specifications to meet the demands of fired heater applications. Below is a summary of typical parameters for TP347H fin tubes:
| Parameter | Specification |
|---|---|
| Base Tube Material | TP347H Austenitic Stainless Steel |
| Fin Material | Stainless Steel (TP304, TP316, TP347H) |
| Fin Height | 10–15 mm |
| Fin Thickness | 0.8–1.5 mm |
| Fin Pitch | 8–12 fins per inch |
| Manufacturing Type | High-Frequency Welding (HFW) |
| Operating Temperature | Up to 650°C (1202°F) |
4. Applications of TP347H Fin Tubes
TP347H fin tubes are highly versatile and used in various high-temperature industrial applications, including:
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