inner-grooved aluminum alloy tube (Alloy grade: 3003 or 3103, etc.)

Aluminum ingots are extruded, drawn, inner grooved to made into tubes.  aluminum tube has good ductility, and the inner helical fin height of 0.05-0.30mm ensures the excellent heat conduction performance required by the air-conditioning heat exchanger, thereby greatly reduced the current air-conditioning production cost.
All tubes can be customized based on your requests on size and fin shape.
 Items Specifications
AL1
OD/mm: φ5±0.05       WT/mm: 0.40 ± 0.03      FH/mm: 0.15±0.02 
Fins Number:   40       Helical Angle: 15°±3       Tip Radius:  28°±5
AL2
OD/mm: φ7±0.05       WT/mm: 0.47 ± 0.05      FH/mm: 0.25±0.03 
Fins Number:   50       Helical Angle: 18°±3       Tip Radius:  28°±5
AL3
OD/mm: φ7±0.05       WT/mm: 0.55 ± 0.03      FH/mm: 0.25±0.02 
Fins Number:   50       Helical Angle: 15°±3       Tip Radius:  28°±5
AL4
OD/mm: φ7.94±0.05  WT/mm: 0.55 ± 0.03      FH/mm: 0.15±0.02 
Fins Number:   55       Helical Angle: 18°±3       Tip Radius:  56°±3
AL5
OD/mm: φ5±0.05       WT/mm: 0.40 ± 0.03      FH/mm: 0.15±0.02 
Fins Number:   36       Helical Angle: 13°±3       Tip Radius:  32°±5
AL6
OD/mm: φ5±0.05       WT/mm: 0.40 ± 0.03      FH/mm: 0.15±0.02 
Fins Number:   40       Helical Angle: 20°±3       Tip Radius:  40°±6