Inside or outside groove

[Koros]

For welding a shell of stack with 3300 mm I.D. and thickness range 15 to 8 mm, inside or outside groove on circumferential and longitudinal seams of stack is preferable.

 

[CorBlimeyLimey]

You may have better responses in forum725

... and a little more info would be helpful.

Does the "shell" keep stuff in or out?

What stuff?

What environment?

What material?