Silver solder 1 inch L type copper pipe


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Old 02-04-08, 02:05 PM
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Silver solder 1 inch L type copper pipe

I'm running some air lines in my garage using 1 inch copper pipe. I have heard that I need to clean the joints when I'm done. If I do not, the flux will corride the joint and pipe. The pipes do have a black stuff on them. If I do were do I find the product to clean them.


thanks
 
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Old 02-04-08, 03:50 PM
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Silver solder is probably overkill, but I could be wrong. Cleaning the outside will have no affect on what is on the inside, it it just cosmetic.
 
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Old 02-04-08, 04:12 PM
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Is this black stuff there after you silver soldered them or the new tubing.

Silver solder first requires that the copper and fittings be cleaned well.
The flux should be cleaned as it would oxidize the copper.
It will not harm the joint but would make it look like a sloppy job.

It is required on air lines that you use a high temperature braze like silver solder or silfoss.
Soft solder is not safe to use.
 
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Old 02-05-08, 03:44 AM
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Silver Solder

I'm using a high temp silver solder. I clean all the fitting and pipe and use flux paste. The joints look clean except for this black stuff.
 
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Old 02-05-08, 04:26 AM
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The flux residue becomes quite hard and brittle after brazing.
It will scrape off and can be cleaned up with water and a nylon scrubbing pad.
 
 

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