Welding threaded fittings to sch 10 316 ss pipe

[Hallrl]

Hello

We are replacing the condensate return line in our dry kilns with sch 10 ss pipe and I am wondering if we will have problems stick welding the threaded fittings for the coil drains to the pipe. My concern is the difference in material thickness between the fitting and the pipe.
We have 1/8" Avesta 309L rod onsite; would this rod be appropriate for the application? I am thinking that 1/8" would be rather large for the sch 10 pipe.
Any suggestions would be appreciated.

Thanks
Richard

 

[MikeHalloran]

If you told us the nominal size of the return line, we could look up the wall thickness of a Sch10 pipe in that size, and be able to properly evaluate your problem.


Mike Halloran
Pembroke Pines, FL, USA

 

[Hallrl]

My appologies ... it is a 4" line, and we will be using 1" npt threaded fittings. I am mainly concerned about blowing through the pipe wall.
I appreciate your time.

Thanks
Richard

 

[MikeHalloran]

It might be sufficient to crank the machines' current limit down a bit from what is used for heavy structurals.

Don't attempt to calculate a number. Some guys can weld foil at 250A, some can blow through cannon barrels at 20A.

Just caution the welders.



Mike Halloran
Pembroke Pines, FL, USA

 

[unclesyd]

Add to the above post by MikeHalloran you need to drop down a size in the electrode to 3/#@" and find a short arc welder.

 

[Hallrl]

Mike,
I had a feeling that would be the case as 1/8" seamed a bit big. I apprecitate your help.

Thank You
Richard