Need to know. Mig/Tig vs stick

[woodlandfarms]

My kingdom for a class i could take on welding... the stars never align for me.

 

[Big Barn]

My kingdom for a class i could take on welding... the stars never align for me.

Certainly not that I am adverse to learning, but I just can't 'handle' classroom atmospheres of any type.

Probably something to do with my being a high school dropout...

Terry

 

[nybirdman]

So why TIG for naval nuclear pipe? Because it is slower and more precise? Something in the TIG process that makes it better?

So, how do you wel a 4" thick piece of pipe? Just layers upon layers? How long does this process take?

The 3-1/2" wall thickness I welded on was 32" O.D.,low pressure side of a turbine in a power house.
One pass of TIG(consumable insert) and(3/32-5/16") 9018 LH out.Four welders on 12 hour shifts and if I remember right about 3 days.X-Ray at the start of each shift.
Passes could be no wider than twice the rod size.Lots and lots of passes.Pre-heated also.

 

[woodlandfarms]

The 3-1/2" wall thickness I welded on was 32" O.D.,low pressure side of a turbine in a power house.
One pass of TIG(consumable insert) and(3/32-5/16") 9018 LH out.Four welders on 12 hour shifts and if I remember right about 3 days.X-Ray at the start of each shift.
Passes could be no wider than twice the rod size.Lots and lots of passes.Pre-heated also.

I just don't have the patience.

 

[Mark @ Everlast]

I just don't have the patience.

If you get back out my way, We'll have some fun instruction time.

 

[dragoneggs]

Last time I did any stainless steel Mig welding was in the 1970s. We used a tri mix gas. Far as penetration, I really don't know. If doing pretty much flat welding you can get into spray arc transfer welding.
https://www.millerwelds.com/resources/weld-setting-calculators/mig-solid-core-welding-calculator
Selecting a shielding gas for joining stainless steel - TheFabricator.com

I understand SA has about 3 weeks maybe experience now so take his words with a grain of salt.