1) You can't use API1104 WPS for ASME sec IX welder qualification.
2) In API 1104 and ASME sec IX there are many difference essential variables for single qualification/ Multiple Qualification/ Mechanised welder with filler addition & Automatic welding without filler metal addition
(e.g: OD grouping, Thickness groping, Filler metal grouping, Joint design not meeting the requirement of ASME sec IX)
You can proceed the welder performance according to respective code approved WPS.
Regards,
Pravin Nimbalkar
Welding Engineer
BILFAL heavy industries ltd. KSA
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