Fcaw weld test for a tank job

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I was wondering if anyone had any useful information about using a key plate to fit up two plates of a tank. On the inside, then you weld out the front then remove the key plate from the inside, grind it out then weld that out? Is that correct or does anyone have any better ways. Don't want to look like a rookie
Reply:Key plate? I can't say I've ever heard that term. You wouldn't happen to mean backing plate would you?Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:No, my title was screwed up. I'm taking a fcaw 2,3,4 g test for this job, I went to a bar to find directions to the job site, I ended up asking the foreman, I sat right next to the guy, crazy, but he was saying it pisses him off no one knows how to use a key plate to fit up the tank plates, for the test I am assuming there is a backing strip, I am just trying to get as much info as possible before I start the job, after I pass the test. Google fit up gear.com key plate animation
Reply:Hey pretty cool, never seen that before, and I use to build tanks for a living. We used two pieces of angle iron tack to the wall of the tank, with all thread and two nuts. And also used dogs and wedges.Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:the key plates i'm familiar with are flat plates with a corner cut out. they are tacked to one side of two uneven adjoining plates and a wedge (key) is driven into the cutout opening and hammered till the plates are even. key plates and half clamps come in real handy for fitting. is this a cbi job?i.u.o.e. # 15queens, ny and sunny fla
Reply:here's another good idea if you're not sure of something and don't want to look like a rube. google it or go to you tube and check out "fit-up gear" it shows another version of the key plate.i.u.o.e. # 15queens, ny and sunny fla
Reply:No not a cbi job, I'm assuming they will have these to use, or have a fitter, any other good tips for first starting out on tanks
Reply:Key plates looked like an H. Welded to inside of one part of shell, usually on low side. A plate wedge, 1/4 plate or so, is driven in to align shell plates, then tacked, inside of shell. Then after fit-up, shell is welded, then outside is back gouged and welded. Depending on job spec, sometimes inside is back gouged and welded. This is how elevated tanks that I worked on, last one was 1971, were done. Company was Pittsburgh Des Moines Steel.Edit: sorry I missed the original FCAW. These tanks were welded SMAW 7018.Last edited by DetailerDave; 12-28-2013 at 07:34 PM.
Reply:Why 2 3 &4g? 3&4g should qualify you for all positions right? --Gol'
Reply:For the longest time here the state structural welding test was 2, 3, and 4. Then they dropped the 2-G test.Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Originally Posted by BigDieselDoggNo not a cbi job, I'm assuming they will have these to use, or have a fitter, any other good tips for first starting out on tanks
Reply:Originally Posted by BigDieselDoggI am just trying to get as much info as possible before I start the job.  Google fit up gear.com key plate animation
Reply:OldSparks that is a really cool picture! I've been in oil refineries that had tanks that big, but I never built one that big.Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:I browsed around on the Fit Up Gear website.  Pretty cool.  Their slogan should be "FUG it all".
Reply:Old Sparks is on the money.I have been the QC Manager on a few of those tanks he shows in the at picture and they are much more complex than might be expected. I watched some CBI pros put up two Ammonia tanks up just like the one he has in the picture. Alloy interior and Carbon Steel exterior, later lined with pearlite insulation. 100% X-Ray. They were masters at it. The scary part- other than climbing those dang jump scaffolds- is driving a portable JLG manlift around on the alloy floor- which is quite flexible and wavy- it will make you just about piss yourself when you come off a floor weld.
Reply:I always liked working in a one man spider lift platform. When nobody was looking I'd like to see how far I could get it to swing side to side. People pay for a ride like that at the county fair. I got paid to play in them!  Attached ImagesDon’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Originally Posted by CEPI always liked working in a one man spider lift platform. When nobody was looking I'd like to see how far I could get it to swing side to side. People pay for a ride like that at the county fair. I got paid to play in them!