5G Thin pipe welding (sanitary pipe, structural pipe) Hello. Today we made a video of a thin pipe welding in a 5G position. I’d appreciate it if you could press “subscribe” and “Like.” Now, this is the same size pipe that we’ve welded in the past time. We put argon gas inside the pipe this way. On the other side, we drilled a hole in the top of the pipe, so that the air inside the pipe could escape. And so I made a window to see the inside of the pipe. This is the inside of the pipe. At the end of the Purge hose, I cut and pasted the fingers of the cotton gloves. That way, the argon gas can spread smoothly. The pipes were “tack” in close proximity. “Tack” is a small size and has been “Tack” in several places. It’s “Tack.” I’m ready for welding like this way Welding preparation will be done in this way. Today, we’re going to do welding in 5G position. The nozzle has an internal diameter of 16mm. It’s about seven millimeters long. Let’s get started When you start welding, move slowly. Because if there’s no gap between the two pipes, we can’t see that it’s going to penetrate So you have to feel it coming into the pipe. Now, if you feel like you’re infiltrating the pipe, please move forward. At this point, it is safe to move the nozzle in a narrow, tight. When Torch wants to move in a narrow, tight range… If you use your wrists more than your shoulders or elbows, it’s easier to make this kind of movement. For example, in my video, the back-bead welding of a stainless pipe is similar to the hand motion. It’s a little bit bigger than that. I think you can weld it like you’re doing back-bead welding. And the size and width of the bead can be a little narrower than what I’m currently welding on. When you weld a pipe without a welding rod like this, if you hold the pipe or the structure around it with your left hand, it’s easier for your body to move. It also prevents the body from shaking. Then your right arm can naturally relax and move smoothly. And that’s what I’m always telling In this weld, the position of the head must always be moved continuously so that it can pass before the melting pool. The current used 45 amps. The gas use is about 20. “purge” gas used argon gas “purge” gas usage is 5 to 6 degrees. Pipe size, conditions and settings, and “purge” gas usage are all the same as in the previous video And melt–the pool is all the same as the previous video, so you can refer to it. If the pipe is about 2mm thick, it is not very thin. But there’s no other way to call this kind of pipe, so it’s called a thin pipe. If you have a better idea, I’d appreciate it if you could tell me. And the official name of this pipe is the structural pipe. But please note that the welding method is applicable to sanitary pipes and other kinds of thin pipes. When you weld this type of pipe, you’ll occasionally have pin-holes at the end. In this case, after the last weld is connected, continue the weld while holding the crater. You can pull the crater out of the bead. This will allow the heat to cool slowly and prevent pinholes from occurring. When welding on the other side, it overlaps the previously welded area by about 5mm so you can start the welding more safely. The video you’re looking at here is to show the inside of the pipe as clearly as possible. I wanted to show you the inside of the pipe more accurately. But I don’t think I’m good at filming yet. If you find a way to make a clearer picture of the inside of the pipe, we’ll upload another video. The screen isn’t clear, but do you understand how the inside of the pipe is welded? At this point, if the current is too high, it can penetrate the inside of the pipe. However, due to the large amount of heat input, the outside of the pipe may be oxidized. And because of these problems, if you’re using too low a current, you may not be able to penetrate the pipe. So, in conclusion, I think it’s important to find an electric current in the middle of these two Now, I want you to take a closer look at the last scene of the crater. Welding is in progress. The weld is now connected. So we’re going to overlap and we’re going to do a little more welding. Then hold the crater and slowly cool down while welding a little more. Stop welding when the heat has cooled down This prevents pin-holes from forming in the finish area when the weld is finished. This is the inside of the pipe. It’s not bad, is it? So here’s the result. And I sometimes post YouTube pictures on my “Instagram” and welds that I don’t have on YouTube. Please visit my Instagram. You can comfortably send me a message. So today we’ve been welding this thin pipe without a welding rod. This welding method can also be applied to “sanitary pipes” or “structural pipes”. Can also be used to weld SCH5 or SCH10 pipes I’ll make a video like that later And that’s what I’m always telling My welding method is not necessarily the answer. But it’s one of the different welding methods that can be applied in a variety of situations, so I hope it helps. I hope this video will be a growing motivation for all the welders and a little bit of help. Please press “Like.” If you “subscribe” and come to my channel, there’s a lot more welding videos. Please visit my “Instagram” as well. Now my greeting is getting longer and longer So I’m going to end it like this today. Thanks for watching.