Stupid question but do I need to qualify welders for every new WPS? Using prequalified AWS WPS's (one is a TEE/corner and the other is a butt joint CJP). Both are carbon steel, same filler metal sizes, parameters etc...nothing changes except joint configuration. If I already have them qualified to a D1.1 WPS/PQR, that was qualified by testing, do I need to have them test again which would be the same vee groove with backing test?