3 inch stainless weld

how many passes would it take to weld a 3 inch stainless joint back purged and a procedure and how long would it take


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for schedule 40 pipe, i generally takes about 4 passes.

root goes in at around 65 75 amps with a 37 degree bevel , feather edge, and tight 1/8 gap.

second pass same heat

bump up maybe 5-10 amps for the rest but let cool for several minutes between passes.

filler rod is 3/32 or 1/8

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