[MW:16128] SMAW 6G Welder - Does it covers All Fillet Weld position (under Smaw)

Dear Welding Experts,

 

Does a 6G SMAW welder legally covers all fillet weld under welding rule?

Is the welding electrode 7016 and 7018 under the same group? Can it be a substitute of each other if the WPS requirement is 7018 only?

 

If it both query is affirmative, please provide the reference code under ASME Sect IX or AWS D1.1 code. Please provide some guide.

 

Much thanks for your help!

 

Regards,

 

Peter Paul