Dented return bends in condenser or evaporator

[cardfan]

Hello,
First time here. Does anyone have experience regarding small dents in copper return bends of condensers or evaporators. We only do final assembly and sometimes we receive a heat exchanger with a small dent in 1 or 2 return bends from shipping. Probably about 10%-15% of the cross sectional area is dented. As a quality inspector, would such damage justify scrapping the part or is it usually nothing to be concerned with. Ideally we want to receive them without damage 100% but probably won't happen since they are delivered from overseas. Any thoughts or experiences? Maybe useful quality standard? By the way, these are 134a window type AC units.

 

[trashcanman]

Check them against the specifications. If no specifications, ask yourself, "Would I buy this?".

 

[imok2]

In my experience return bends are noted for developing leaks and with dents on the outter bend where the gas veolcity would be the greatest the development for a leak is increased. Therefor the coil has a greater possibility of developing leaks sooner then it would otherwise so if you insist on using these defective coils then may I suggest selling them at a discount wirh the provision of say a limited warrenty so the buyer knows what he's getting. Of course the home owner should be informed of what he's getting!