Introduction
HH-finned Tube is a bimetallic composite welded finned tube widely used in high-requirement applications such as air coolers, boilers, and petrochemical heat exchangers.
Products Advantages
Improved Heat Transfer Efficiency
The HH structure employs a double-layer high-fin design, increasing the air-side heat transfer area and enhancing turbulence, thereby improving the overall heat transfer coefficient.
Corrosion Resistance
The outer fins can be made of stainless steel/nickel-based materials, resistant to corrosion from chloride ions, sulfides, etc.
Prevention of Fin Detachment
The fins and base tube are bonded using high-energy welding or composite rolling welding processes, resulting in high bonding strength and long-term stable operation at high temperatures of 400–550°C.
Manufacturing Process of HH-Finned Tube
We employ a process route of bimetallic composite welding + multi-pass precision rolling.
The process includes:
Raw material inspection
Tube straightening
High fins forming
Dual-H composite assembling
Automated welding / roll-bonding
Laser online measurement
Finishing and full-size testing
Each process step ensures:
High fin weld strength
Fin height and pitch accuracy (±0.1mm)
Batch consistency and long-term operational stability
Packaging & Shipping
Utilizing moisture-proof film, port protection caps, layered partitions, and reinforced wooden crates/steel frames to prevent fin deformation or corrosion during transportation.
Supports FOB/CIF/DDP and offers various shipping methods including sea, land, and air freight.
