S9074-AQ-GIB-010/248 Rev 1
f. FS tool classes or variants not included in A-2.1.7 and A-2.1.10. g. Use of portable FSW equipment. h. Any application of FS other than for Littoral Combat Ship (LCS) 2 Ship Class hull structure fabrication/repair and other FS applications specified by a fabrication document. A-2.1.25 Thermal Management. The method(s) employed for active or auxiliary heating or cooling of the FS tool, fixturing, base material(s), or machine component(s) (FS tool holder, spindle, etc.). A-2.1.26 Thickness Mismatch. The height difference between the two parallel surfaces to be welded. A-2.1.27 Tilt Angle (Travel Angle). The angle of the FS tool tilt from the workpiece in the direction of travel. A-3 PROCEDURE QUALIFICATION FOR FSW, FSP, AND REPAIR OF FRICTION STIRRED MATERIAL. A-3.1 SCOPE. This section provides general requirements for the qualification of FS procedures and procedures for repair of friction stirred materials, including repair by fusion welding. Specific qualification requirements for the categories listed below shall be as specified in A-3.4. a. FSW b. FSP c. Repair of friction stirred material d. Special welds A-3.2 GENERAL REQUIREMENTS. A-3.2.1 Submittal for Approval. Submittal for approval shall be as specified in 4-2.3, except that: a. For FS processes, additional special weld requirements shall be per A-3.4.5, and b. FS tool life procedures shall be approved per A-3.6.1.1. A-3.2.2 Approval of Procedure Qualification for Special Welds. NAVSEA approval shall be obtained for special welds as defined in A-2.1.24. A-3.2.3 Qualification Levels. Qualification levels for FSW, FSP, and repairs of friction stirred material shall be as specified herein. A-3.2.3.1 General. Procedure qualification is required for base materials listed in table A-1, FSW, FSP, and associated repair of friction stirred materials as specified herein. The essential elements for each base material/filler metal combination shall be incorporated into the welding procedure and shall be in accordance with the requirements of this document and the applicable fabrication document. A-3.2.3.2 Level I. This qualification level covers the initial qualification of any FS welding or processing procedure for the fabrication welding or processing of material by any activity. This qualification level also covers requalification of these procedures, after initial qualification, for variations outlined in A-3.7. The destructive and nondestructive test requirements and acceptance standards for the FSW and FSP qualification test assemblies shall be as specified by table A-2 and A-3.5. Qualification for fusion welding, FSW, and FSP does not qualify repair of friction stirred material. Repair of friction stirred material requires separate level II qualification in accordance with this document. A-3.2.3.3 Level II. This qualification level covers requalification of level I qualified procedures for variations outlined in A-3.8, and for the initial qualification for repair of friction stirred material. The test assembly shall be welded with the modified essential element values and all other essential elements maintained within the level I qualification ranges unless otherwise stated herein. The destructive and nondestructive test requirements and acceptance standards for the FSW and FSP qualification test assemblies and qualification test assembly for repair of friction stirred material shall be as specified in table A-2 and A-3.5.
A-3
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