How to Read Welding Symbols: Part 1(Full 3 part video in WELD™ app)
How to Read Welding Symbols: Part 1(Full 3 part video in WELD™ app)
Employers look for specific skills in potential candidates. One of the main is “being able to read welding symbols”. Jason developed a lecture that would teach students how to interpret welding symbols. The AWS has 2 documents that he highly recommend purchasing for your library. The first one is AWS A2.4 Standard, Brazing, and Nondestructive Examination. The next one is AWS A3.0 Standard Terms and Definitions.
Learn everything about welding symbols in our app full of resources: https://beta.weld.com/CourseDetails?c…
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Content
0.06 -> hey guys welcome back to well calm so we've had
a lot of requests it's a highly requested topic
4.86 -> we've had a lot of DMS emails comments in our
comments section just overwhelming responses we
10.41 -> put out a video a couple weeks ago we showed
a welding symbol and people said hey can you
14.82 -> do more videos on welding symbols so we're gonna
start incorporating those into every lesson but I
18.96 -> think it'd be a good idea to make a full video
about welding symbols so because of the amount
24.21 -> of information we're getting to break it up into
a little series so let's talk about exactly what
29.07 -> a welding symbol is okay it's basically a symbol
that you're gonna find on your blueprints or shop
33.87 -> drawings and it's going to tell you how to make
a specific weld in a specific spot what size it
39.48 -> should be how long it should be depth joint
preparation all kinds of stuff so two things
45.36 -> I highly recommend you guys go out and throw in
your library is the AWS a 3.0 standard welding
50.91 -> terms and definitions and then the other one is
the a 2.4 standard symbols for welding brazing
56.82 -> and non-destructive examination so these are
two books I mean they're they're just worth
63.27 -> their weight in gold very good information in both
of these books reference them from time to time
68.04 -> out on the job site or you know if I have to do
stuff in the office I reference this information
73.35 -> all the time so it's more than paid for itself
go ahead and pick them up another thing another
77.7 -> great resource you guys can get is the camera
man I'll put a link in the description there
82.47 -> is like a cheat sheet or a quick study guide I
don't have mine with me but you can pick those
86.58 -> up the relatively cheap get online and it's
just like a quick little card that you can
90.81 -> kind of refer back to for all the information
we're going to discuss today and the additional
95.19 -> episodes so let's go ahead and we're gonna get
into it we're gonna first break down exactly
99.66 -> what a welding symbol is and how to read them okay
welding symbols are nothing more than modern-day
106.2 -> hieroglyphics okay it's a picture that's gonna
give us a bunch of information about what we
110.67 -> have to weld how we're gonna weld it sometimes
the process is listed in there the size of the
115.8 -> weld is going to be listed depth of fusion joint
preparation all kinds of good information right
120.9 -> so the first thing we want to talk about is this
horizontal line this is called a reference line
125.73 -> this is where all your information is going to
stem from okay and then we have what's called the
131.52 -> arrow line that's going to point directly to the
you're supposed to be working on our you're gonna
135.72 -> make wherever you're going to make that welt and
it doesn't matter which side that that line points
140.82 -> to okay you can point left right but regardless
you're always going to read the welding symbols
145.41 -> from left to right so if I have the information
here it's always going to go from left to right
150.33 -> left to right on both of these now sometimes
we have a tail and the tail is used to give us
156.15 -> additional information additional things that
aren't found on the welding symbol they don't
160.14 -> have a weld symbol for it or supplementary symbol
for it such as process or specific preparation or
167.37 -> when we get into talking about back welds and
backing welds because it's pretty much the same
172.08 -> symbol they're gonna go ahead and list it in that
tail the information that they don't actually have
176.76 -> a symbol for okay so now that we have this right
here let's talk about the sides okay always this
184.44 -> is going to be always the arrow side and this up
here is always going to be other side okay so it
190.92 -> doesn't matter which way the arrow is pointing
always the top is always going to be other side
195.3 -> and the bottom is always going to be arrow side so
this is called a welding symbol these right here
200.91 -> are weld symbols okay and these are my groove
weld symbols and these are additional symbols
208.8 -> right here so I have Phillip plug tslot stud
spotter projection seam back or backing surface
214.59 -> and edge okay so these are all the grooves that
can be made and these are all the additional welds
219.15 -> that can be made so let's go ahead and we'll
practice we'll just go through a basic fill
223.41 -> it weld and then I'll show you where arrow side
and other side kind of originate and then how to
228.6 -> how to measure these out as far as length so you
can take the information conveyed on the welding
232.65 -> symbol and put it into your put it into your work
so remember this whole setup here is the welding
238.2 -> symbol and these right here are the weld symbols
okay and that's specified in those two documents
243.48 -> that I was telling you about okay so here's five
different types of joint configurations we're
248.4 -> gonna go ahead and kind of walk you through the
process of arrow side other side because it can
252.42 -> get pretty confusing really quick always remember
that the information on the bottom is going to
257.13 -> apply to arrow side information it's going to
go on the other side is always going to be on
261.87 -> the top so other and this is arrow okay so this
right here would be the arrow side and this one
271.35 -> is the other side okay get on the joint number two
arrow side other side same thing common T joint
283.59 -> right have the arrow arrows pointing down here
so we have arrow side other side again same thing
294.71 -> and again here arrow side other side okay so let's
go ahead and we'll walk through let's talk about
304.53 -> different welding symbols so this right here
would be a butt joint okay the two pieces are
309.36 -> butted together doesn't look like there's any
preparation here but let's just walk through a
313.35 -> simple set up that's the typical single V joint
configuration now arrow is pointing to this this
320.85 -> weld is going to occur on the arrow side okay so
that means my joint preparation is going to take
328.2 -> place right here okay so that's when you would
see that that type of information so now let's
335.7 -> get into this side right here let's do a groove
weld on one side and a fill it on the other okay
345.12 -> so this is a single single bevel v group on the
arrow side and it's symbol for a Filat weld on the
354.12 -> top okay so the Filat weld is going to go on the
other side and the single bevel v is going to go
360.3 -> on the arrow side so this is what that weld would
look like okay so now I have a groove weld over
369.66 -> here and a fill it weld on this side down here
what if I wanted to fill a weld on both sides
377.32 -> just like that that's gonna tell me that I need
one filler weld it here on the arrow side one
382.36 -> fill it weld on the other side and we'll get
into dimensioning these here in a minute same
387.85 -> thing with this lap joint over here we have arrow
side other side let's go ahead we'll just put one
392.71 -> filler weld in on the other side so you guessed
it it's gonna go on the top because the top of the
398.2 -> reference line is our other side and then we'll
put that fill a 12 in here now this piece right
403.6 -> here is kind of interesting this is a edge joint
so we're just going to weld right along top of
408.43 -> the edge and that's what this symbol looks like
right here okay so we're just gonna we'll put a
416.95 -> weld right up in this area so as you can kind of
already tell the symbol kind of you know signifies
425.98 -> or represents and looks like what we're trying to
achieve so right here I have a double or a single
432.19 -> V and it's going to go right in here okay and it
looks like that single V down here I have a Philip
438.34 -> weld fill it well typically looks when it's done
correctly very similar to a triangle okay and then
446.26 -> my single single bevel over here it's just one
single bevel remember I have a straight vertical
451.27 -> leg the vertical leg is always going to go on
the left hand side of the weld symbol so any weld
455.98 -> symbols where you have a vertical line it's always
gonna go to the left okay so here's my my flat
462.49 -> piece and this is the part to get the preparation
okay same thing fill it well just to triangles
472.87 -> and that's what it looks like here just two
triangles same thing up here a triangle and
478.06 -> now the edge joint just two pieces butted
together so it looks like a butt joint with
482.32 -> the two vertical lines okay let's go ahead
I'll draw another another sketch out here
486.43 -> we'll start talking about dimensioning okay so
let's just do a standard T joint everybody's
493.12 -> familiar with a T joint especially you guys in
school you're probably welding the heck out of
496.09 -> them things right now okay so right here
is just a standard T joint let's go ahead
499.3 -> and draw a weld symbol for it we'll talk about
what it means okay what size fill a while gonna
507.37 -> go on that's right other side so it's going
to go over on this side then how do we know
514.33 -> how big the what to put this so let's say we
have 3/8 material and they're gonna call out
519.25 -> for a 3/8 Filat weld the size of your Filat
weld is always going to go on the left-hand
526.99 -> side so remember earlier when I said we always
read from left to right it's gonna be the same
532.9 -> thing other side 3/8 fill it weld okay so both
of these symbols are telling me the same thing
540.76 -> even though one's drawn with the arrow to the
left one's drawn with the arrow to the right
544.54 -> so what would that look like just like this
and that would tell me that dimension from
551.86 -> right here at the root to the top or the toe of
that that Filat weld should be 3/8 of an inch
563.39 -> now how long should I make this okay that's
the notice thing we have to think about how
568.19 -> long is this welds gonna be well if there's
no information to the right hand side that
573.23 -> means I'm gonna weld that joint out the full
full seam okay so let's draw an overhead view
578.15 -> okay now this view this is the bird's-eye
view looking looking top-down we're looking
585.8 -> at this piece of material okay so this
right here symbolizes this this member
591.17 -> turnt the opposite way and this is going to
be the vertical plate for the T joint so if
599.03 -> I flip this up on end and spun it back that
way this is gonna be the bottom plate laying
603.83 -> flat and this is our vertical plate laying up
let's say I needed this was a 10-inch piece
608.96 -> and I needed to put a 10-inch Filat
weld in there how would I do that
616.34 -> the length is always going to be to the right
of that filler weld symbol so the size of the
624.23 -> weld and the length of the weld okay let's say
this is a 10 inch piece but I only wanted to
629.33 -> weld up let's say eight inches of it that
symbol would be right there okay so we have
638.03 -> a 3/8 fill a 12-8 inches long over the span
of a 10-inch piece all right so you notice
643.19 -> when I drew this I put the 8 inch weld in
the center so let me show you exactly what
647.33 -> that would look like so right here we would have
some dimensioning lines this would be a 1 inch
651.56 -> difference on either side and in the middle
here is where I'm gonna have my weld symbol
662.52 -> okay we would put that on this welds occurring
on the other side so we'll put that filler weld
670.08 -> there remember it's three eighths of an inch fill
it weld we're gonna say eight inches okay so that
681.06 -> way you would know that this weld is actually
gonna sit on the center so we have a 8 inch
686.13 -> weld if 10 inches overall the difference between
that there's 2 inches 1 inch on either side so
691.71 -> you're gonna step in 1 inch make your 8 8 inch
weld and then stop make sure you fill into the
696.63 -> entire cross section of that weld because that
is where the the CW is gonna come and inspect
701.67 -> your work that's where he's gonna measure - he's
gonna measure at your crater your crater needs
706.35 -> to be 3/8 of an inch because if it's anything
less right he has to go by that the weakest the
711.96 -> weakest link in the chain so if you have let's say
a 3/16 well because that crater is not completely
718.8 -> filled in he's gonna mark this whole thing as
a 3/16 weld and it's gonna be under sized so
724.02 -> you need to make sure that you write that to
the complete size that it's supposed to be all
727.32 -> right let's try something a little bit more
complicated all right let's try something a
730.47 -> little bit more difficult so here I have three
pieces we're gonna put four different size fill
736.14 -> it welds on here so on one side I'm gonna have
a 3/8 the other side I'm gonna have a 5/16 and
741 -> then over here we're gonna have quarter inch and
3/16 so exactly where would these welds go which
747 -> weld size would go where I'm go ahead and give
you a second to figure that out all right now
753.93 -> we're back so 3/8 on the other side other side
in this case isn't going to be over here it's
760.05 -> going to be here because remember I'm pointing
at this joint I'm not going to cross this member
764.52 -> here I'm gonna cross over on this side okay
so up here I'm going to have 3/8 fill it well
772.86 -> and on this bottom one here we're
gonna have five sixteen now what
779.46 -> about over here three sixteenths to the arrow side
785.24 -> and then quarter inch to the other side okay so
remember other side because my arrow is pointing
792.59 -> right here I'm gonna have other side arrow side
for my five sixteenths now over here arrow side is
798.95 -> going to be three sixteenths while the other side
is one quarter of an inch let's go ahead and move
803.51 -> on to intermittent fil-a twelves alright so let's
talk about intermittent Phila twelves alright so
809.3 -> let's look at a tea joint in overhead view or
plan views is called as I'm looking down on it
813.95 -> okay and I want to make a intermittent filler
weld okay so I'm gonna put it on the arrow side
822.38 -> right and let's make a quarter-inch weld we're
gonna space these out to one six you know when
833.69 -> we talk about weld spacing it's always gonna be
written like this so this number right here the
839.87 -> two that's gonna be the length of our weld and
then the whatever digit is on the right-hand
844.4 -> side after the - that is going to be the spacing
of the welds now the spacing of the welds always
850.22 -> goes from Center to Center it doesn't go from
start to start and and it's always Center to
856.04 -> Center that's how they're gonna measure it okay
so what exactly does that mean that means we're
859.94 -> gonna have two inch welds every six inches on
center so we'll go ahead and mention these two
866.6 -> inches here two inches here two inches here but
from Center to Center we're gonna have six inches
872.87 -> in between now this is welded only on one side
so now what if we have intermittent filler welds
879.08 -> on both sides of the material once again we're
still in the overhead view but now the welding
884.72 -> symbol is about to change a little bit okay let's
go ahead and just for just for you know building
890.24 -> a little bit more confidence let's go ahead and
do quarter inch up on this side three-eighths
895.61 -> on this side okay for some reason the engineer
wants different Wells of different places so 3/8
900.41 -> arrow side is gonna go down here and then the
quarter inch would go on the other side which
905.6 -> is the top okay so same thing two inch weld every
six inches but we're gonna go on both sides that's
913.67 -> where our walls are going to be placed and again
two inch welds and they're going to be six inches
919.1 -> now again we want to be careful with this because
our crater we need to make sure that our craters
925.79 -> are filled in to the complete cross-section so
that the welds are quarter inch in our crater and
931.88 -> three-eighths and the arrow side crater you want
to make sure to fill those completely in otherwise
937.67 -> if it's too small that welded area right there
the inspectors is gonna come in and check your
943.4 -> work he's gonna have to go off of that weld so
if you put if you have a full 3/8 weld all the
949.31 -> way across here but in your crater you're down
to a quarter of an inch he's gonna mark that
953.48 -> down as a quarter of an inch for that entire
weld you're gonna have to redo it your get to
957.02 -> add more weld to it okay so try to get it right
the first time I always recommend if you're a
960.98 -> welder learn how to measure your own welds and
get the tools to do it you can pick up a cheap
966.38 -> set of filler weld inspection gauges I'd go with
gal you can get those on Amazon you can get them
972.2 -> at your local welding supply store but get those
to make sure you're hitting the appropriate size
976.82 -> so when the the inspector comes over and checks
it out you know you don't have to go back and
981.98 -> redo your work you already know now if he calls
it something different than what you assumed it
986.12 -> to be don't argue with him just go back and
fix it okay so let's get rid of these we've
991.64 -> got one more type of intermittent filler weld
I don't want to talk to you guys about standard
1000.13 -> t-joint and the overhead view will mix it up
a little bit come down here remember we have
1007.3 -> our air line and we're gonna do two types of
Filat welds now see how these Filat welds are
1015.01 -> offset that tells me that the welds are gonna be
offset in the spacing we'll do two on six again
1021.48 -> and we'll do let's say 5/16 welds remember leg
size or weld size is gonna go on the Left length
1029.61 -> and pitch is gonna go to the right if there is
no pitch if that other digit isn't there that's
1034.5 -> the size that's the length of the weld that you're
gonna be putting in there okay and all your prints
1038.55 -> should be in 1:1 dimensioning factor or the other
so they're either gonna be Imperial or they're
1043.5 -> gonna be metric or you know whatever the case may
be that should be standard throughout the entire
1048.45 -> set of prints you shouldn't have everything drawn
out in standard form and then you know all your
1052.71 -> measurements in in metric okay it's and that's
not gonna happen it's not standard it's not how
1056.76 -> it's supposed to be done okay so let's go ahead
and draw this out okay again these are going to
1063.51 -> be two inch welds and it's gonna be every six
inches okay so now on the backside we're gonna
1071.07 -> be opposite okay so all the welds are still two
inches and then we're gonna have six inch centers
1078.03 -> same thing here we're gonna have six inches in
between our two wells so remember intermittent
1088.14 -> Filat welds gonna be one right over top of the
other and that tells me that they're gonna go
1094.68 -> one on side one on either side okay and then we
have the intermittent or I'm sorry the staggered
1101.16 -> intermittent the symbols are gonna be offset
so any times those symbols are offset that's
1105.72 -> going to tell me that the welds are also going
to be offset one on top of the other they're
1109.74 -> just gonna be equal they're gonna be on opposite
sides okay so that pretty much covers all your
1114.51 -> different instances where you would run into
intermittent fellow welds all right homework
1118.95 -> time if you guys want a free slap for your hard
hat or your welding hood go ahead and take a
1122.61 -> picture of the last filler well do you guys did
go ahead to mention it out curricula correctly
1126.81 -> and put it up on Instagram using hashtag well
comm symbols or put it up in the Facebook page
1131.76 -> we'll go ahead if you're correct we're gonna go
ahead and we're gonna mail you out of sticker so
1135.78 -> right now I have to go eat crow in other words
man cub won the hurricane challenge so now I
1140.25 -> got a spring for lunch so we're gonna go ahead
we're gonna head out to lunch I'm gonna get a
1144.06 -> Miss chocolate shake he's been whining about and
then stay tuned for part two where we talk about
1148.29 -> groove welds okay make sure you hit that subscribe
button in that notification bell that way you're
1152.52 -> notified when we release our next episode
til time make every well better in your last
1156.36 -> all right let's go man of my word I owe
this man some food so we're gonna go in
1173.97 -> here get our grub on I'm going to do
two baking smash with pretzels with
1180.6 -> the pretzel bun one I'm gonna get drinks and
smash fries and a diet coke one it's gonna
1186.18 -> be a salted caramel shake shake know it for
you buddy good yeah hope you're enjoying that
1217.23 -> the burger there Mike first and last time you
ever beat me on the next one all right gotcha
Source: https://www.youtube.com/watch?v=Svoi1v_o5yI