|
Hi Skinner, I think it's time you take the time to find out why pipe eats your lunch. Half the battle of welding pipe or verticle up is in your head and since you think you going to fail, you will. Your using 3/32" rods and thats fine but your moving too slow. This happens alot when you've been using 1/8" rod as your used too looking at carrying that massive weld puddle, therefor you move too slow trying to get that wide molten puddle. Another cause is your watching the "slag" puddle and not the molten puddle. I suggest you get some scrap plate, run some verticle up beads while paying close attention to whats a molten weld puddle and whats slag. Use a close arc length with a flat to 5* rod angle. Pipe is welded with the same techinque. Try moving too slow, too fast, hold a long arc length, a very close arc length, etc. You will quickly find out what your "were" doing wrong. The cracks can be caused by several reasons that BFO covered. Oil left on pipe will add carbon to the weld puddle and too much carbon will make the weld or surrounding base metal very brittle when cooled. Weld joint fit up also controls cracking. Make sure your final fit-up is with-in 1/8" gap opening. What happens with large gaps is you apply alot of weld in a short area and when it cools it draws very hard and quick thus craking the surrounding base metal because of two different cooling rates. It's also very hard to control porosity on the back side of the weld with large gaps. T_Bone
| 
