in need of some help can i use these bends for turbo manifolds Carbon Steel S235 Pipe Fitting ,1 1/4 think its 3 mm thick mybe more heres some pictures of it
also argon gas can be used when tig welding and whats the best filler rod to use ?
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any input lads would be great

 

These can be used. Stainless steel is better, but for budget or first build you can definetly use them. I made my first manifold from them, used 1 1/2" with 3mm wall.

Good luck

 

cheers also i guess this piping has to be back purged too ?

 

No, you don't need to backpurge this, this is mild steel, which has no sugaring as far as I know.

Good luck!

 

sounds good thanks again good input great help