Brazing Copper Pipe Hvac

If a hacksaw is used a sawing fixture should also be used to ensure square cuts. 4 recommended practices general strong leak tight brazed connections using copper and steel pipe tube and fittings are usually made using filler metal which melts in the temperature range of. Brazing rods look like straightened metal coat hangers and like solder they become stronger as the percentage of silver they contain increases.

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Every plumber and many hvac technicians have had the privilege and frustration of attempting to solder a copper water pipe that has a leaking valve which prevents the complete shut off of water flow.

Brazing copper pipe hvac.

Basic brazing this is a module 4 video. Cut pipe square cut to the exact length required using a tube cutter or hacksaw. We will be brazing or silver soldering refrigerant a c lines for hvac equipment. The braze is what is melted by the torch to join two metals.

Hvacr pipe soldering brazing refrigeration systems soldering pipe with leaking valves. Thank for you. Procedures for brazing pipe and tubing. If you purge the piping of air and fill the inside with nitrogen or ofn you will not have the formation of copper oxide on the inside of the pipe when you braze.

Hvac and medical gas technicians have been trained for years to only braze when the pipe and fittings are filled with nitrogen sometimes called oxygen free nitrogen or ofn. For joining copper lines we usually use brazing rods that are made out of a copper phosphorous combination. The most commonly used brazing filler metal types used to join copper tube and fittings fall into two distinct categories. The brazing temperatures for most of the brazing alloys used to joint copper piping systems bcup and bag alloys see below are roughly between 1 150 f 621 c and 1 550 f 843 c.

Step by step tutorial on how to braze copper pipe like a pro. Remove all inside and outside burrs with a reamer file or other sharp edge scraping tool.