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A quite common welding certification take a look at for boilermakers is a 2 inch schedule 120 tube welded in a 6G place utilizing Tig for the foundation and second cross, and stick welding for the filler passes and canopy passes.
Sound Easy? If you happen to suppose it is easy, you’re fallacious.
A 2″ pipe accomplished in a 6G place implies that the pipe is positioned with the axis of the pipe operating 45 levels from parallel. As soon as the take a look at begins, it can’t be rolled, raised, or lowered.
Which means you might have to have the ability to place your self in a method that lets you transfer as you weld to maneuver from the underside, up the aspect, and to the highest. That generally means beginning out within the kneeling place, transferring to a midway standing bent over place, after which standing. All whereas making an attempt to keep up a constant arc size whereas transferring at a gentle even velocity. 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 take a look at the welders ability and since a 6g weld take a look at qualifies for all different positions.
Its impractical to check a welder within the subject doing the precise job that might be accomplished as soon as the welder is licensed.
The 6G take a look at is usually thought of one of the best ways to cull the not so nice welders and rent the most effective ones.
(though a 2G together with a 5G may be higher)
One more reason 2 inch pipe is used for a weld take a look at is that boiler tubes are sometimes the identical diameter because the take a look at and they’re additionally usually welded whereas put in and subsequent to different boiler tubes. Welding a 2 inch tube is difficult sufficient with nothing in your method. Put one other boiler tube simply inches away on all sides and the weld is far tougher to do.
Testing utilizing a 6G take a look at offers some indication {that a} welder can weld from either side of a joint.
I took a 6g take a look at 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 take a look at would have been extra consultant of the work accomplished.
