Dear All
We are Doing Welding OF Big tank having dia 5200 mm and thk is 6 mm max our welding engg told us some point to us can u help me or comment on this

1) use both side welding for 6 mm thk
2) use double tource welding for 2 mm thk jacket
3)for shell do first welding from bottom to up ( uphill) and when you welding from outside you go by down hill welding.

is there any formula to calculate how much fillet required in welding
1) if welding from one side
2) if welding from both side



thanks