ASTM A335 P22 Alloy Steel High Frequency Welded / HFW Solid Plain Finned Pipe

HFW (High-Frequency Welded) finned tubes are used in various applications to enhance heat transfer in heat exchangers, boilers, and condenser systems. The fins are typically welded onto the surface of base tube using high-frequency welding techniques, ensuring strong bonds and durability, improving heating efficiency. Finned tubes can be customized in terms of diameter, length, and fin thickness based on specific requirements of the system they are used in.

Types of HFW Finned Tubes:

1. Solid Plain Finned Tubes:

   • Design: Have smooth and solid fins attached to the surface of the tube.
   • Applications: Ideal for situations where low pressure drop and high heat transfer efficiency are required, typically in air-cooled heat exchangers.
   • Advantages:
     • Provides a larger surface area for heat transfer.
     • Simple design, often easier to clean.

2. Serrated Finned Tubes:

   • Design: Feature fins that are serrated or wavy, which helps interrupt the flow of fluid over the fins, creating turbulence.
   • Applications: Suitable for applications where enhanced heat transfer is needed and can handle varying temperatures and flow rates.
   • Advantages:
     • Increased turbulence enhances heat transfer efficiency.
     • Can reduce the chances of fouling compared to solid fin designs.

ASTM A335 P22 Alloy Steel Pipe Chemical composition(%)

ASTM A335 P22 Alloy Steel Pipe Mechanical properties

Common Base Material of HWF solid finned tube

HFW finned tubes can be made from a variety of materials, including carbon steel, stainless steel, and alloy materials, depending on the application requirements.

Performance Features

• Heat Transfer Efficiency: The fin design increases surface area, leading to improved heat exchange performance.
• Pressure and Temperature Resistance: Capable of withstanding high pressures and temperatures, making them suitable for demanding environments.
• Corrosion Resistance: Depending on the material, fin tubes can be designed to resist corrosive environments.

Advantages of high-frequency welded finned tubes

• The installation is simple and economical. The length of high-frequency welding spiral finned tube can reach 6m, reducing the connection points, making the installation economical and fast, and reducing the probability of water leakage at the connection.
• The maintenance is simple. After the installation of high-frequency welding spiral finned tube, the maintenance is basically unnecessary.
• High efficiency. High frequency welding of spiral finned tube is the full contact welding between fins and steel pipes. The heat dissipation area is more than 8 times that of smooth tube. The internal is smooth and the internal water flow resistance is small.
• Long service life, high mechanical strength of the combination of fins and pipes, and tensile strength of more than 200Mpa. The inside and outside of the pipes are all hot-dip galvanized.

Application of Finned Tube in Industries

• Petroleum Industry
• Chemical industry
• Wood industry
• Food industry
• Steel Industry
• Plastic molding industry
• Glycol dehydration units
• Coils for hybrid cooling towers
• Printing Machines
• Production of surface coatings
• Solvent recovery
• Cooling of turbine air intakes
• Textile production
• Greenhouse heaters and breeding
• Tanneries
• Anti-freeze coils for process air
• Paper works