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How to Gas Weld Copper Pipe – A Complete Guide

How to Gas Weld Copper Pipe

Gas welding is a popular and effective welding technique used for joining copper pipes. Copper is an ideal material for gas welding because it has high thermal conductivity, making it easier to weld than other metals. If you’re looking to learn how to gas weld copper pipe, you’ve come to the right place! Let’s get started.

Tools You’ll Need for Gas Welding Copper Pipe

Before you can start gas welding copper pipe, you’ll need some tools and supplies. You’ll need a pair of safety glasses or goggles, a welder’s helmet, welding gloves, a welding torch, and two pieces of copper pipe that fit snugly together. You’ll also need flux paste and solder wire. Flux paste helps prevent oxidation from occurring during the welding process, while solder wire ensures that the joint is airtight once it cools down.

How to Gas Weld Copper Pipe

Once you have all your tools together, the first step in gas welding copper pipe is to clean the surfaces of both pipes thoroughly with sandpaper or steel wool. This will help ensure that the surfaces are free of any dirt or debris which could interfere with the resulting weld. Once they are clean, apply flux paste liberally around the edges of each pipe, where they will be joined together. This will help reduce oxidation during heating and provide additional protection against leaks once cooled down.

Next, use your torch to heat up both ends of each pipe until they become red hot—usually about 500°F (260°C). Once both pipes are heated up evenly, press them firmly together and hold them in place until they cool off completely—about 15-20 seconds, depending on their size—to form an airtight seal. Finally, run some solder wire along the seam between the two pipes to make sure there are no gaps or leaks in the joint before moving on to your next project! It’s as simple as that!


Gas welding copper pipes may seem intimidating at first, but if you follow these steps carefully, it should be a breeze! With only a few basic tools and supplies needed for this task, anyone can become an expert at gas welding copper pipe in no time at all! So go ahead – give it a try today!

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