Welcome to the X3M TIG channel.
In today's video, we will talk about socket weld fittings and some details.
A Socket Weld is a pipe attachment detail in which a pipe is inserted into a recessed area
of a Valve, fitting, or flange.
Socket Weld fittings are mainly used for small pipe diameters
generally for piping whose nominal diameter is NPS 2 or smaller.
Small Bore Piping
an expansion gap of 1/16 inch (1.6 mm) between the pipe and the shoulder of the socket.
The purpose of the bottoming clearance in a Socket Weld is usually to reduce the residual stress at the root of the weld
to allow for differential expansion of the mating elements.
To join pipe to Valves and fittings or to other sections of pipe, fillet-type seal welds be used.
The pipe does not need to be beveled for weld preparation.
The weld metal can not penetrate into the bore of the pipe
SW Fittings are a family of high-pressure fittings are used in various industrial processes.
They are available in three pressure ratings... Class 3000, 6000, and 9000.
They could be made out of stainless steel
Easy to weld in horizontal
or simply rollout weld on carbon steel
Now I'm going to weld root pass on 304L 90 degrees socket weld fitting.
Just slightly wiggling that torch, and trying to put a nice seal weld for my first pass.
There are some advantages of socket weld fittings
Radiography is not practical on the fillet weld; therefore correct fitting and welding is crucial.
There is different techniques how to weld in horizontal, but I like to walk the cup.
I'm using ER308L filler wire 1/8 rod
lay wire technique at the top of the weld puddle
and pushing down the puddle without crossing that edge of the fitting.
The most important thing is to avoid getting undercuts
Ok , let's move on to rollout weld
This welding is really simple, I'll do a quick root pass
On all stainless steel fittings, I got a purge hose inserted inside the pipe.
Just pay attention to not cross or burn the top edge on the fitting
I'm walking the cup here, I find this works very good for me when I'm tigin sockets
With TIG you got very good control and welds can turn out really nice.
I will show you later two more welding applications that you can use on socket weld fittings
This is a single-pass cap with a minimum of two passes on SW as per WPS.
Now I will show you on carbon steel socket weld
The minimum requirement is three passes
With two passes showing on the cap
as per welding procedure specification or WPS.
Generally, carbon is easier to weld as you can run hotter on root pass
so it's faster
you need approximately 2 - 4 minutes to weld 2" socket weld.
Same thing for the cap, walking the cup
I'm welding with ER70S-6 filler wire
I'm trying not to go over the edge, but that's just me, you can go as long as you don't have undercuts.
Now I'm going to put the second pass here
Trying to keep overlap with the first pass around 50 percent
Now I will show you how to weld using flux core on socket weld fittings
Angle your torch a little bit facing inside fillet weld
Same thing here, keep an eye on your puddle to not cross the edge of the fitting.
Flux core is really fast, so with the right settings on your welding machine
shouldn't be any problems
The second pass is even faster so, good foot-hand coordination is crucial
With a second pass, you wanna go downhill slightly...
In the end look's pretty decent, a little bit clean up with wire wheel
OK, now Stick welding on socket weld fittings
As shown I will use 3/16 and 250 amps
With stick, angle a little bit towards inside and watch for the top part
I like to use my own tools that I find handy to knock off the slag for tie-ins.
This will be only one pass cap.
That's it...
Hope you guys find something useful in this video
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