ThePipingMart Blog other How to Gas Weld Copper Pipe?

How to Gas Weld Copper Pipe?

How to Gas Weld Copper Pipe?

Are you looking for a way to join two pieces of copper pipe without the need for soldering? If so, you’re in luck! Gas welding is an easy and efficient way to join two pieces of copper pipe together. Let’s dive in to learn how it’s done.

What You Will Need

In order to gas weld your copper pipes, you will need a few supplies. Most importantly, you will need the following items that can be purchased from any home improvement store or online retailer: a propane torch, a pair of welding goggles, a 1/2-inch round file and some flux paste. The flux paste is used to clean the metal before welding takes place. Be sure to wear long sleeves and pants while welding since sparks may fly as you work.

Gas Welding Process

Now that you have all of your supplies, it’s time to get started! Begin by cleaning both ends of the copper pipe with emery cloth or steel wool until they are shiny. Next, apply some flux paste on each end using your finger or cotton swab. Once this step is complete, attach the propane torch to one end of the pipe and make sure it fits snugly. Adjust the flame until it is about two inches long and blue in colour.  Point the flame at one end of the pipe and move it back and forth until it becomes red hot; this usually takes about 10 seconds but can vary depending on how thick your pipe is. Now repeat this process on the other end of the copper pipe. Finally, use your round file to clean off any excess flux paste from around where you applied heat.

Once both ends are heated up sufficiently, position them together so that they overlap by about an inch or two and hold them firmly in place until they cool down completely; this should take about 15 minutes or so, but again can vary depending on how thick your pipes are. Congratulations—you have just successfully completed your first gas-welded copper pipe joint!


Gas welding copper pipes provides an efficient way for DIYers and professionals alike to create strong joints without having to rely on soldering techniques, which often require more specialized tools and knowledge for success. With just a few simple steps—and some safety precautions—you can easily join two pipes together in no time flat! So what are you waiting for? Get out there and start gas-welding those copper pipes like a pro!

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