Aluminum grooved tube for heat exchanger

The inner grooves improve heat transfer and have been optimized heat exchanger products.

Maximum inner high fin 0.37mm, regular inner groove tube just between 0.1-0.18mm.

Our grooved aluminum tube examine and verify by Daikin Japan and use for improving efficiency.


Alloy grade

3003, 3103


heat exchanger

Tensile strength




Size Range

MIN: φ7.0mm OD x 0.36mm WT
MAX: φ35mm OD x 2.70mm WT

Salt Spray

1000 hours

Products Details

We are a manufacturer of grooved tube aluminum in Changzhou city

Inner grooved tubes will improve the heat transfer performance of the heat exchanger solution.


  • Material alloy grade:3003,3103
  • Temper: O, H12 and H14
  • threaded aluminum tube
  • length: LWC aluminum tube
  • maximum fin high:0.38mm

Technical parameter:

  • Processing:Cold extruded and annealing online
  • Pipe Tensible strength: >120Mpa
  • Tube Elongation: >35%
  • Bursting pressure > 1800 PSI
  • Surface quality: smooth and neat 

inner groove tube

Parameter for grooved tube


Spec Bottom wall thick Fin High Groove number Helix angle Top angle
Φ5mm 0.3-0.4 0.05-0.38 40-50 18° 50°
Φ7mm 0.4-0.5 0.05-0.38 40-50 18° 50°
Φ9.52mm 0.45-0.55 0.05-0.38 45-55 18° 50°
Φ7.94mm 0.4-0.5 0.05-0.38 40-50 18° 50°

Alloy grade.

3003 Aluminum chemical composition

Grade Si Fe Cu Mn Zn Al
3003 0.6 0.7 0.05-0.2 1.0-1.5 0.1 99.3%

3003 alloy grad we call it antirust aluminum. it has good corrosion and passes 500 hours salt spray testing


Processing technology 

How does cold extrusion model work for the aluminum tube?

the first step is extruded by casting and rolling machine,

the second step is cold drawing to be more strength

and the third step is on annealing to be flexible soft aluminum tubing.

precision drawing tubes on the aluminum industry.



  • Heat exchanger
  • Aluminum tube condensers and evaporators
  • Aluminum fin coils
  • AHU coils products


  • 60% high thermal conductivity more than smooth aluminum tubing
  • 1000 hours of salt spray testing
  • Rohs certification environmentally
PS: what is different from smooth inner aluminum tubing?

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