I'm learning to solder 1/2" copper pipe, and am not pleased with the results. I was expecting a nice clean bead of solder around the joint, but instead there are tiny pinholes in the solder that's filling the joint. It looks as if the joint isn't getting completely filled.
I'm using recently-purchased silver solder with matching flux, and I'm using flux on both the outside of the tube and the inside of the fitting. I've cleaned the tubing with an abrasive pad sold for this purpose. I'm propane-heating the connection hot enough that the solder melts easily and wicks around the joint immediately.
And yet, there is no clean shiny bead of solder. Am I doing something wrong, or is everything ok and my expectations are wrong? Do those pinholes in the solder joint represent a potential leak, or are they ok?
I should mention that this is empty pipe, being soldered on my workbench, so there's no water in the pipe.
Thanks for any help anybody can offer.
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