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| Categories | Fin Tube |
|---|---|
| Brand Name: | yuhonng |
| Model Number: | ASTM A335 P22 |
| Certification: | ABS,CCS,BV, LR, DNV, PED |
| Place of Origin: | China |
| MOQ: | 100kgs |
| Price: | Negotiable |
| Payment Terms: | T/T,L/C |
| Delivery Time: | 7 days |
| Packaging Details: | Ply-Wooden Packing with iron frame |
| Surface Treatment: | Plain, Polished, Coated, etc. |
| Material: | Alloy Steel, Stainless Steel, Carbon Steel, etc. |
| Fin Pitch: | 2mm-20mm |
| Advantages: | High Efficiency, Compact Design, Cost-effective |
| Size: | Customized |
| Application: | Heat Exchangers, Air Conditioning, Refrigeration, etc. |
| Company Info. |
| Yuhong Group Co.,Ltd |
| Verified Supplier |
| View Contact Details |
| Product List |
The ASTM A335 P22 Alloy Steel Seamless Tube with 11-13% Chromium (Cr) HFW Fin Tube is engineered for high-efficiency heat transfer in extreme temperature and pressure environments. Combining the high-temperature strength of P22 alloy steel with the corrosion resistance of chromium-rich fins, this product is ideal for convection coils in boilers, heaters, and industrial thermal systems.
| Element | Composition (wt%) | Standard Requirements |
|---|---|---|
| Carbon (C) | 0.05–0.15 | ASTM A335 |
| Chromium (Cr) | 1.90–2.60 | |
| Molybdenum (Mo) | 0.87–1.13 | |
| Manganese (Mn) | 0.30–0.60 | |
| Silicon (Si) | 0.50 max | |
| Phosphorus (P) | 0.025 max | |
| Sulfur (S) | 0.025 max |
| Element | Composition (wt%) | Key Role |
|---|---|---|
| Chromium (Cr) | 11.00–13.00 | Enhances oxidation & corrosion resistance |
| Carbon (C) | 0.08–0.15 | Balances strength & weldability |
| Nickel (Ni) | ≤0.50 | Improves toughness |
| Manganese (Mn) | 0.30–0.60 | Supports hardenability |
| Parameter | ASTM A335 P22 Base Tube | 11-13Cr Fin Strip |
|---|---|---|
| Tensile Strength (MPa) | ≥415 | 450–600 |
| Yield Strength (MPa) | ≥205 | ≥250 |
| Elongation (% in 50 mm) | ≥30 | ≥20 |
| Hardness (HBW) | ≤187 | ≤230 |
| Max Operating Temperature (°C) | 650 | 550 (continuous service) |
High-Temperature Durability
P22 alloy steel withstands temperatures up to 650°C with superior creep resistance, ideal for superheaters and reformers.
Chromium fins resist oxidation in flue gas and acidic environments.
Corrosion & Sulfidation Resistance
11-13Cr fins prevent sulfidation cracking in sulfur-rich atmospheres (e.g., refinery heaters).
Optimized Heat Transfer
HFW fins increase heat exchange surface area by 4–6x, enhancing efficiency while maintaining low pressure drop.
Robust Welding Quality
High-frequency welding ensures fin-to-tube bond strength ≥85% of base metal, validated by shear testing.
Cost-Effective Solution
Combines the high-temperature performance of P22 with the corrosion resistance of Cr steel, reducing downtime and maintenance costs.
Base Tube Production
Seamless manufacturing via hot extrusion or rotary piercing, compliant with ASTM A335.
Heat treatment: Normalized at 900–940°C, tempered at 690–730°C for optimal microstructure.
Fin Welding Process
HFW fin attachment: Welding speed 8–25 m/min, frequency 200–450 kHz.
Post-weld stress relief (PWHT) at 600–650°C to eliminate residual stresses.
Testing & Certification
Non-Destructive Testing (NDT): 100% UT/RT on base tube; PT/MT on welds.
Hydrostatic Testing: 1.5x design pressure (ASME B31.1 compliant).
Certificates: ASME Section II, EN 10204 3.1, and PED 2014/68/EU.
| Industry | Use Cases |
|---|---|
| Power Generation | Boiler convection sections, superheaters, and economizers in coal/gas plants. |
| Petrochemical | Cracking furnaces, hydroprocessing heaters, and sulfur recovery units. |
| Industrial Heating | Thermal fluid heaters, waste heat recovery coils, and process air preheaters. |
| Chemical Processing | High-temperature reactors and reformer tubes in ammonia/methanol plants. |
| Feature | ASTM A335 P22 + 11-13Cr HFW Fin Tube | Carbon Steel Fin Tube | Stainless Steel 321 Fin Tube |
|---|---|---|---|
| Max Temperature (°C) | 650 | 400 | 850 |
| Sulfidation Resistance | Excellent (Cr-enhanced) | Poor | Moderate |
| Cost | Moderate | Low | High |
| Typical Lifespan | 12–18 years | 5–8 years | 15–25 years |
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