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Good day to everybody out there. I have develop a new machine to produce a single tube consisting of two different materials called bimetallic tubes and this machine can accept any size as small as 2.5mm OD till 180mm OD or even higher.  have tried out a few samples and one of them is a tube consisting of copper tube at the inside core and aluminium tube at the outside core. Anyone who is experience on HVAC can recommend if this bimetallic tube is suitable for airconditioning or refrigeration purposes as this will help to solve galvanic corrosion since aluminium tube in this case contacts with aluminium fin but maintaining copper material on the inner side. Any feedback is appreciated. Below is a picture of the bimetallic Al/Cu tubes.<br>
 

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I`m from Poland and I haven`t seen that kind of solution. But the most important is the relation betwenn the prices and the advantages between Your solution and PEX/AL/PEX
 
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