Looking at a job at a waste treatment facility and will have to certify. Piping ranges from 2" to 12" and both sch 10 and 40. Tig root and out will work on the smaller stuff, but the 8" and 12" are sch 40.Some of it will be in the ditch,most is under cover. Not sure what to use for wps or if one procedure would even cover it all.  Thank all for any advice .

Hello Al, not sure what you ment by the yes thing. I think i could have worded my question a little better, am wondering if a dual shiel wire is an option and hase anyone used it before. Perley