Dear Friends,
We are first time going for our welders' qualification as per ASME Sec IX. Our new job has following criteria:
(1) Material - SA516 Gr 60, max plate thickness 50mm for Butt welding.
(2) Material-  SA 106 GrB, Pipe size 6", Schedule 80. All Fillet Welds.
(3) We need to use GMAW with 80-20 Ar-CO2 mixture.

Can anybody please describe how to move ahead with the welders' qualification? How many WPS will suffice these requirements? As per my understanding only one WPS will do- with 25mm plate thickness in downhand position. Is it true?

Looking at the job's requirement, I need to qualify my welders into 3G and 6G positions. What should be the size of test specimens for Butt welding in 3G? Joint design with 45 deg of total "V" having 3mm root gap and 1.5mm root face is allowed?

A detailed guidance is solicited.

Thanks !