Burn Through
(1) h shall be 0.5 mm or less.
(2) L is determined as follows. L is the total length for all portions. [1] t > 1 mm
(a) Welding of a pipe circumference: L shall be less than 40% of the circumference. (b) Straight bead welding: L shall be less than 25% of the total bead length.
[2] t 1 mm
L shall be less than 80% of the bead length for all beads.