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Hi All,I wanting to start practicing on pipe, ultimately working toward a 6GR. I have a bunch of 4" sch.40 left over from a project. Is that good to work with, are there any pros and cons? Thanks for the input.
Reply:The smaller the pipe, the tougher to weld. Get up to about 24-inch pipe, you might as well be welding on a wall.Dont pay any attention to meIm just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:6GR can be tough, depending on the restrictions. 4" pipe will work fine, but like CEP said, the smaller the pipe, the tougher it is. I wouldn't necessarily say "harder". With a smaller diameter, your torch/rod angle has to change quicker and more dramatically. If you are able, I would practice tig root/hot pass, and stick fill/cap. It's the most common test you will take for employment. Tig all the way too. And some 6010 root passes just for "fun". It's asked for every now and then.
Reply:Originally Posted by akabadnewsWith a smaller diameter, your torch/rod angle has to change quicker and more dramatically.
Reply:Never done a 6gr so did a search. Is this the one you're after? http://www.pftf597.org/assets/1/7/UA-29.pdf . It's almost 1/2" wall. If you're practicing smaw I would think you would be happier with a heavier wall. Your 4" sch. 40 would be fine for tig.Last edited by OldSparks; 03-10-2014 at 02:36 PM.
Reply:I'd buy a stick of whatever you are going to test on. Cut it in half, weld, cut out the coupon, etc. it only disappears an inch and a half at a time, so 10' gets you quite a bit of practice. Schedule 40 is usually thinner than anything I have been asked to weld.
Reply:Keep in mind sch 40 12" is .406w, in the pipe world sch std. Is most common or sch xs occasionally you run into some others. 12" .250w is a pretty common pipeline test 6" sch xs is more common in plants. I personally think 12" is best to learn on because it gives you a good amount of side and bottom to practice with. I practiced when I was learning on anything I could find from .156w 4" to .500w 20". I still wasn't proficient until I had 500+ hours on the firing line |
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发表于 2021-8-31 23:18:23