|
| Brand Name: | YUHONG |
| MOQ: | 200-500KGS |
| Price: | Negotiable |
| Payment Terms: | L/C,T/T,AT SIGHT |
| Supply Ability: | According to Clients' requirements |
1.ASTM A335 P22 Alloy Steel HFW Solid Finned Tube
ASTM A335 P22 is a chromium-molybdenum alloy steel known for its excellent high-temperature strength and oxidation resistance. With a nominal composition of 2.25% Chromium and 1% Molybdenum, it offers enhanced creep resistance and structural stability at elevated temperatures, making it a preferred choice for high-temperature, high-pressure service.
The ASME SA335 P22 HFW (High-Frequency Welded) Solid Finned Tube is an advanced thermal engineering component where solid steel fins are continuously welded onto the P22 base tube. This construction creates a durable, integral heat transfer surface specifically designed for demanding high-temperature applications in aggressive industrial environments.
2.Chemical Composition
P22 Chemical Composition (%)
|
Element |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
|
Range |
0.05-0.15 |
0.30-0.60 |
≤ 0.50 |
≤ 0.025 |
≤ 0.025 |
1.90-2.60 |
0.87-1.13 |
3.Mechanical Properties
P22 Mechanical Properties
|
Tensile Strength |
Yield Strength |
Elongation |
Hardness |
|
≥ 415 MPa (60 ksi) |
≥ 205 MPa (30 ksi) |
≥ 30% |
≤ 163 HB |
4.Key Features & Advantages
1.Superior High-Temperature Performance: Maintains excellent mechanical strength and creep resistance at temperatures up to 580°C (1075°F)
2.Enhanced Heat Transfer Efficiency: Solid fin design provides maximum extended surface area for optimal thermal performance
3.Robust Welded Construction: HFW process ensures strong metallurgical bond between fins and base tube with minimal thermal affected zone
4.Excellent Oxidation Resistance: Chromium content provides good resistance to scaling in oxidizing atmospheres
5.Proven Reliability: Established material for ASME-code high-temperature pressure components with extensive service history
5.Comparison with Related Grades
P22 vs. P5:
P5 (5% Cr) offers better oxidation resistance for more severe environments, while P22 provides a cost-effective solution for many high-temperature applications with adequate performance.
P22 vs. P11:
P22 contains higher chromium (2.25% vs 1.25%), providing superior oxidation resistance and higher temperature capability compared to P11.
HFW Solid Fin vs. Studded Fin:
Solid fins offer continuous heat transfer surface with better aerodynamics, while studded fins provide better mechanical protection in highly abrasive environments.
6.Applications
1.Petrochemical Heaters: Convection section tubes in refinery process heaters and cracking furnaces
2.Power Generation Boilers: Superheater and reheater elements in thermal power plants
3.Heat Recovery Steam Generators: High-temperature sections in combined cycle power plants
4.Chemical Process Heaters: High-temperature heat exchangers and process heaters
5.Industrial Furnaces: Heat transfer tubes in direct-fired process furnaces
