good examples

by chris
(payette id)

I work at a place and have argued with most everyone there that welding a lifting eye on down hill is not really acceptable but they all believe down is as good as up... some even say better so thanks for the info I'm glad the money I spent to go to welding school wasn't a waste... thanks need tips on tig though


---------------------------------------------------

downhill on a lifting eye? wow.

I have worked at shops where mig was forbidden on lifting eyes....

that seemed kind of dumb but the safety book at that job was written based on actual incidents so i kind of figure a mig weld must have snapped somewhere along the line.

but downhill mig on a lifting eye is not good practice.

all it takes to raise awareness is some scrap metal and a big sledge hammer or hydraulic press.

tee joints in 1/2" thickness welded downhill and then hammered or pressed to failure vs uphill.

when that is done, everyone knows the truth.

Comments for
good examples

Average Rating starstarstarstarstar

Click here to add your own comments

Dec 21, 2012
Rating
starstarstarstarstar 		the differance NEW
by: chris

The diff of uphill and down hill welding is very simple when welding down you will not get enough penn into the metal it bassically only penatrates th toe of the weld and not the root it allows the weld metal to to flow to fast and in complete weld penn then occures when you weld up wards it gives the metal plenty of time to melt in at the root for hard wire mig this takes a lot of pratice but dual sheild wire or 7018 rod or 6010 rod is much easier to get down there is places where welding down hill is ok in non strcutreal applications on thin sheet metal ect. I even heard on some pipe aplacitons but I'm not a into pipe yet so I haven't got a clue
Dec 17, 2012
Rating
starstarstarstarstar 		Welding of lifting eyes NEW
by: Robo

I welded a lot of lifting eyes clean metal by grinding. No paint oil or grease. For code preheat 275 degrees, put lifting eye to where it has to go. Tilt 1/16 to 1/8 gap one side tack 7018 then even gap and tack 180 degrees. Then 2 more at 90 degrees. The reason to gap simular to socket welding a socket welded steam line. Weld shrinkage can occur when weld cools inducing cracks in tne weld. Once you have a good weld all around . Put enough reinforcement passes all around avoiding under cut. The determining factor will be the thickness of the pad or stem of the lifting eye. Fiberglass wrap to allow slow coolilg even a post heat of 250 degrees and then a wrap of fiberglass weld blanket to allow slow cooling of weld never quench with water! Bare wire mig metal has to be so clean, i prefer dual shield flux core with 75/25 gas shield, but most were attached with good ole 7018 never had a failure even had millwrights side pull the lifting eye 45 degrees or more to the side while drifting a huge vacuume pump into position, after they were done i cut the lifting eye off with a torch to prevent its use again in the future.
Dec 17, 2012
Rating
starstarstarstarstar 		Welding of lifting eyes NEW
by: Robo

I welded a lot of lifting eyes clean metal by grinding. No paint oil or grease. For code preheat 275 degrees, put lifting eye to where it has to go. Tilt 1/16 to 1/8 gap one side tack 7018 then even gap and tack 180 degrees. Then 2 more at 90 degrees. The reason to gap simular to socket welding a socket welded steam line. Weld shrinkage can occur when weld cools inducing cracks in tne weld. Once you have a good weld all around . Put enough reinforcement passes all around avoiding under cut. The determining factor will be the thickness of the pad or stem of the lifting eye. Fiberglass wrap to allow slow coolilg even a post heat of 250 degrees and then a wrap of fiberglass weld blanket to allow slow cooling of weld never quench with water! Bare wire mig metal has to be so clean, i prefer dual shield flux core with 75/25 gas shield, but most were attached with good ole 7018 never had a failure even had millwrights side pull the lifting eye 45 degrees or more to the side while drifting a huge vacuume pump into position, after they were done i cut the lifting eye off with a torch to prevent its use again in the future.
Apr 22, 2011
Rating
starstarstar 		What's the difference?
by: Peter

For us newbies out here, what's the difference between welding downhill and welding uphill?

Click here to add your own comments

Return to mig welding techniques.