What is a Pipefitting Takeoff? | Pipefitting Basics

hi welcome back welcome family my name is david cerisa i'm going to show you guys how to do takeoffs on 90s 45s and flanges and what the takeoff actually means when measuring pipe so let's get started [Music] all right guys so i got a six inch long radius 90 here and i'm gonna explain to you guys what the actual takeoff is when we're accounting for for our measuring here so the takeoff of this is the section of pipe that we are going to remove in order to account for the distance this knight is so on this particular case a six inch 90 here it's gonna be nine inches and how do we find this information well we have several options we have our pipefitter bluebook we have these chico cards and we have this piping selector you can find that information on all of these so our actual takeoff is going to be from the end of pipe to the center of the 90. as you can see here guys i've drawn this 90 out onto the table and if we measure from this end to center here we're going to get nine inches and a common way to do this also is you actually get the nominal pipe size which would be six inches on this case and then you cut that in half and you add those two numbers together so six inch cut that in half we got three add those two together and now we have nine inches and that is our total takeoff from n to center of pipe so you may have heard me say the term long radius 90. a lot of you may have not known what that is as you can see the difference here i have a long radius 90 and a short radius 90 here the short radius 90 has a much tighter turn and the takeoff is very different than a long radius 90. on the short radius 90 you're only going to remove one nominal pipe size for your takeoff on this so in this particular case we have a six inch short radius 90. our takeoff from end to center of 90 will be six inches i have a six inch 45 here and show you guys what the takeoff of that looks like as you can see it's pretty much a long radius 90 cut in half and the takeoff for this is going to be very different than finding the take off for this that information can also be found on your blue book chico cards and piping selector all right guys so i'm going to show you how to find these takeoffs without having to use the books or chico cards or if you don't have access to any of that so we'll start off here with the long radius 90 here so we have a six inch night in this particular case so we're gonna go with our nominal pipe size that's gonna be six then we're actually gonna break that down in half three and then we're gonna add these two numbers together that will give us a nine inch takeoff for our long radius 90 and for our 45 degree elbow we're gonna do a very similar process so we go with our nominal pipe size to six inches break that down in half that'll give us three inches same as our 90. we're gonna break this down in half again [Music] which will give us one and a half and now we break this down one more time in half again and that'll be three-quarter and now we take this number and this number [Music] and we add them up three plus three quarter three and three quarter inches all right guys so we have a short radius 90 as well that we showed you [Music] a 90 short radius and the only thing we have to do with that one is use our nominal pipe size and that'll be our takeoff for it so we all have six inch fittings here so our takeoff for this one will be six inches all right so this is how you find the the takeoffs here on the chico cards we're going to go to page 7a which is our standard but well fitting makeups here we're going to go up the top and look for our long radius 90 degree which has a letter d we go to letter d and on this top header now we're gonna find our pipe size which is six inches run it down and there's our nine inches for our takeoff and you would do the same thing for knighties flanges and any other kind of fitting you're looking to find the takeoff here it follows the same process find the letter follow it down then follow your pipe size on the top header so on the piping selector wheel here to find your takeoffs you just point this arrow here to whatever fitting valve or whatever takeoff you need right now we have it pointing at our long radius 90. and your nominal pipe size right here is on the side you come up to six inches number right next to it that's your take off so nine inches hi guys so on this pipe fitter blue book you turn to page 95 you can see here again we have our long radius 90. you go right here to nominal pipe size you go down to six you can see on our drawing here it says to go to a to get our take off and go all the way down till you get to a it's also nine inches all right guys and as you become more familiar with your fittings and the takeoffs you won't really have to be looking up each and every time for trying to find your takeoffs it'll kind of become the norm and familiar you know you can be able to do it right off the top of your head you know two inch ninety you get the pipe size break it in half two plus one that gives you three all right guys so i'll show you guys how to get a take off of this flange here the simplest and easiest thing if you have access to the fitting already in front of you you get your tape measure you actually put it on the inside and measure all the way to the face of your flange here this particular six inch 150 flange is three and a half inch takeoff for it this information can also be found on chico cards the piping selector wheel and your blue book as well so there are a lot of classifications of flanges here and this particular one is a six inch 150. you know the more common ones you're going to have six inch 300 6-inch 600 6-inch 900 and all this information is still on your chico cards and you just need to be careful when you actually go down the list that you're on the right rating of flange as these flanges as the rating goes up they do get thicker and the measurement does change and that can throw you off when you actually go to build your your piping piece all right so we go here to g which is our weld neck flange here and you see here we have all the g's on the bottom here showing all the different classes we're going to go with our first one which is the 150 we're gonna go down to our pipe size which is three and a half inches and as you see if we jump up to a 300 which is right below it the takeoff there is three and seven eighths and as the rating goes up the flange take off gets larger and larger all right guys so in order to know what kind of flange or what class of flange you have you there's actually stamping usually on this outer edge of this flange and you can see here this one says six inch 150 on it so we know we have a class 150 flange hi guys so my name is david cerisa and today we showed you guys how to do takeoffs on 90s flanges and 45s if you liked the video don't forget to please like comment and subscribe see you guys the next time [Music] you

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Id: -TrlkvEhKoc

Length: 9min 11sec (551 seconds)

Published: Mon Aug 23 2021