If you learn to weld with 7018, you'll be able to weld pretty much anything made of steel that broke(within reason). Pipe welding has to be pretty near perfect. When you do your tests, the pipe is cut into strips, the welds ground flat on both sides and then bent 180 Deg. around a rounded die. Half of the bends are from the root side(inside) of the pipe and the other half is done from the face(outside) of the pipe. You are allowed a maximum combined flaw from all bends of not more than 1/8 of an inch. When I mentioned about tapping the rod on the chipping hammer, I just meant to make sure you pick up the hammer off the work piece so it doesn't arc. You won't become part of the circuit. Welders are designed so that the open circuit voltage isn't high enough to kill you. It can give you a shock but not very often. Like someone mentioned, you could get a shock from a screw on the stinger if your bare hand touched it. I once was welding a broken water line on a golf course and because the ground was so wet I got a shock just touching the ground while going into the hole. Wet conditions caused the current to go through the rubber on the cables. I'd be willing to bet that if you tried to do the same welds, in the pictures, on a low end AC machine, you wouldn't have anywhere near the same result. Even if you had a high frequency. After having a good machine, being able to see exactly what you are doing and getting in a comfortable position are the most important factors in producing quality welds. Dave
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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