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A quite common welding certification check for boilermakers is a 2 inch schedule 120 tube welded in a 6G place utilizing Tig for the foundation and second move, and stick welding for the filler passes and canopy passes.
Sound Easy? If you happen to suppose it is easy, you might be fallacious.
A 2″ pipe achieved in a 6G place implies that the pipe is positioned with the axis of the pipe working 45 levels from parallel. As soon as the check begins, it can’t be rolled, raised, or lowered.
Meaning you’ve gotten to have the ability to place your self in a approach that lets you transfer as you weld to maneuver from the underside, up the facet, and to the highest. That generally means beginning out within the kneeling place, shifting to a midway standing bent over place, after which standing. All whereas attempting to keep up a constant arc size whereas shifting at a gentle even pace. That is the type of welding that separates the lads from the boys.
Whoever chosen the 6g place for welding certification exams was both completely incompetent or an evil genius.
6G welding certification exams for boilermakers are used as a result of they check the welders talent and since a 6g weld check qualifies for all different positions.
Its impractical to check a welder within the area doing the precise job that can be achieved as soon as the welder is licensed.
The 6G check is usually thought of the easiest way to cull the not so nice welders and rent one of the best ones.
(though a 2G together with a 5G is perhaps higher)
Another excuse 2 inch pipe is used for a weld check is that boiler tubes are sometimes the identical diameter because the check and they’re additionally typically welded whereas put in and subsequent to different boiler tubes. Welding a 2 inch tube is tough sufficient with nothing in your approach. Put one other boiler tube simply inches away on either side and the weld is far more durable to do.
Testing utilizing a 6G check offers some indication {that a} welder can weld from each side of a joint.
I took a 6g check as soon as after which welded a complete bunch of 2g and 5g tube joints in a fab store. By no means did a 6G for the entire yr I labored there. So in my case, a 2g and a 5g check would have been extra consultant of the work achieved.
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Source by Jody Collier
