More especially regarding the header/manifold applications for all-aluminium brazed heat exchangers, aluminium tubes can be punched on CNC machine with the specific manufacturing range:

Tube dimension = Ø 12 - Ø 80 mm
Accuracy = 0.1 mm from hole to hole
Material thickness = 1 to 6 mm for aluminium
Length up to 6000 mm
 
Based on many years of experience, Hydro Aluminium Precision Tubing is in the position to be a competent, co-operative partner starting at the product development stage of HVACR systems.