Root Pass Procedure Qualification ASME IX

Do the provisions of QW-200.4(b) permit a GTAW procedure qualification test weldment performed on a 13 mm thick coupon to support depositing a root pass in a production joint of the qualified base metal having a thickness of 8 mm when impact testing is required?

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No, if CVN requirement see 403.6, minimum base metal thickness qualification from 13 mm to 26 mm.

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