Use of nitrogen while brazing

Old 08-04-22, 03:43 AM
Thread Starter
Join Date: Nov 2009
Location: Tennessee
Posts: 18
Upvotes: 0
Received 0 Upvotes on 0 Posts
Use of nitrogen while brazing

I have watch a number of different services braze the copper lines on A.C. condensers and up to now, none of them used nitrogen to control copper oxide in the joints.

I can on attribute not doing it to the following reasons. If I am off base in my reasoning, I would appreciate any correction and information on just how important brazing with nitrogen might be or not be.

1. From experience, those that do not do it have found it not to be as necessary as others claim it to be.
2. It takes more time and another step in the job as well as extra costs involved that lead to less profit for the job.
3. If the oxide does create a problem in the system, it probably will not show up immediately leading to another service call.
Old 08-04-22, 12:57 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 63,041
Received 3,593 Upvotes on 3,222 Posts
It is customary to flow nitrogen at a slow rate thru the copper pipes while brazing to reduce the oxides that build up on the inside of the pipe during high heat.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: