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| Ονομασία μάρκας: | Yuhong |
| Αριθμός μοντέλου: | ASME SA213 TP304H οδοντωτός σωλήνας με πτερύγια |
| MOQ: | 200 ~ 500 kgs |
| Τιμή: | Διαπραγματεύσιμα |
| Όροι πληρωμής: | TT, LC |
| Ικανότητα προμήθειας: | Σύμφωνα με τις απαιτήσεις των πελατών |
ASME SA213 TP304H Serrated Finned Tube with SS304 Fins For HRSGs and Boilers
An ASME SA213 TP304H Serrated Finned Tube with SS304 Fins is a premium, high-efficiency component critical for the performance and reliability of modern industrial boilers and heat recovery systems.
Here are some detailed breakdowns:
1. Base Tube: ASME SA213 TP304H seamless tubes
(1). Chemical Composition (Weight %)
The composition is defined in the ASME SA-213 specification. The following are the required percentages, presented as either a maximum or a controlled range.
| Element | Composition Requirement (%) | Notes & Importance |
| Carbon (C) | 0.04 - 0.10 | This is the key difference from TP304. The controlled minimum carbon is essential for high-temperature creep strength. |
| Manganese (Mn) | 2.00 max | Aids in hot workability and strength. |
| Phosphorus (P) | 0.045 max | An impurity that reduces toughness and must be controlled. |
| Sulfur (S) | 0.030 max | An impurity that can cause brittleness at high temperatures; must be minimized. |
| Silicon (Si) | 0.75 max | Increases strength and oxidation resistance. |
| Chromium (Cr) | 18.00 - 20.00 | Provides oxidation and corrosion resistance by forming a protective oxide layer. |
| Nickel (Ni) | 8.00 - 11.00 | Stabilizes the austenitic crystal structure, providing ductility and toughness. |
| Nitrogen (N) | 0.10 max | Can increase strength, but is controlled to prevent embrittlement. |
The defining feature of the "H" grade is its controlled carbon content (0.04-0.10%), which is crucial for maintaining strength at elevated temperatures.
(2). Mechanical Properties (at Room Temperature)
These properties are for the material in the solution-annealed (softened) condition, as required by the standard.
| Property | Requirement | Test Standard |
| Tensile Strength | ≥ 515 MPa (75,000 psi) | ASTM A370 |
| Yield Strength (0.2% Offset) | ≥ 205 MPa (30,000 psi) | ASTM A370 |
| Elongation in 2 inches (50.8 mm) | ≥ 35% | ASTM A370 |
2. Finned Tube Type: Serrated Finned Tube
Serrated Fins: These are not smooth, continuous fins. They are cut at intervals to create a serrated or segmented pattern.
Advantages:
3. Fins Material: SS304 Fins
This specifies the material of the fins.
SS304: This is standard 304 Stainless Steel (without the "H" grade requirement). It offers excellent resistance to oxidation and corrosion from the flue gases. Since the fins are not pressure-retaining parts, they do not need the stringent high-temperature strength (creep) properties of the "H" grade tube. Using SS304 provides a good balance of performance, cost, and manufacturability.
4. How it made?
This tube is manufactured by a process called high-frequency welding (HFW). A strip of SS304 is fed into a machine that wraps it helically around the SA213 TP304H base tube. As it is wound, a high-frequency electrical current is applied, which heats and fuses the fin root to the tube wall, creating a strong, metallurgical bond with high thermal conductivity.
5. Key Advantages Summary
Primary Application: Boiler Superheaters and Reheaters
This is the most classic and critical use case, typically found in:
Other Key Applications
1. Heat Recovery Steam Generators (HRSGs)
Used In: Combined cycle power plants.
Function: Captures waste heat from the exhaust of a gas turbine (which is still very hot, ~500-600°C / ~930-1100°F).
2. Process Heaters & Furnaces
Used In: Oil refineries, petrochemical, and chemical plants.
Function: Heats process fluids (e.g., hydrocarbons) to specific reaction temperatures.
3. Waste Incineration Boilers
Function: Generates steam from the heat produced by burning municipal or industrial waste.
4. Economizers
Function: Pre-heats the boiler feedwater using the leftover heat from the flue gas before it exits the stack.
