Welder prolongation

Please confirm that how welders are prongolated as per EN. What is the difference between welder prongolation as per EN or ASME.

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each specification allowed 6 months.
EN standard: renewal qualification after 2 years.

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Please confirm about welding operators.

Each welding operator needs recertification after 6 years according to ISO 14732

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Renew or prolongation in ISO 9606.