S9074-AQ-GIB-010/248 Rev 1
APPENDIX C USE OF STANDARD WELDING PROCEDURE SPECIFICATIONS FOR NAVAL APPLICATIONS (SWPS-N)
C-1 GENERAL. Where this document is specified for use, SWPS-Ns may be used by activities for production welding subject to the requirements of this appendix. Requirements regarding SWPS-Ns specified by a fabrication document shall be in addition to those specified herein unless there is a conflict, in which case, see C-1.3. Except for repairs, only one SWPS-N shall be used to weld a joint; in addition, no other welding procedure of the activity shall be used for welding along with a SWPS-N in the same joint. For repair of weld defects, a different SWPS-N from that used for initial welding, or an activity’s qualified weld procedure, may be used. A full list of published AWS -NAVSEA SWPS- Ns can be found by searching “AWS - NAVSEA” at the AWS Online Bookstore ( https://pubs.aws.org). C-1.1 SWPS-NS NOT ACCEPTABLE FOR USE IN TOUGHNESS APPLICATIONS. Where governing specifications restrict base material and welding filler material for a given system, component, part, etc. to only those grades/types having toughness requirements, SWPS-Ns may only be used as a template or guide for an activity to write its own welding procedure and perform full qualification welding and testing, including toughness testing, in accordance with all requirements of Chapter 4. C-1.2 ACTIVITY ACCEPTANCE OF SWPS-NS. For each SWPS-N, the activity performing the welding shall enter the name of the activity and each fabrication document on the SWPS-N for which the SWPS-N will be used. All SWPS-N requirements shall be met and those requirements shall not be modified, except that values of essential elements more restrictive than those listed in the SWPS-N may be specified if needed; supplemental requirements not affecting essential elements or other technical requirements of the SWPS-N may be added as necessary. C-1.3 FABRICATION DOCUMENT REQUIREMENTS. All fabrication document requirements shall be met in addition to the requirements of the SWPS-N. In the case of conflict between a SWPS-N requirement and a fabrication document, the fabrication document shall take precedence. C-1.4 ACTIVITY CERTIFICATION OF SWPS-NS FOR USE. The activity performing welding shall certify their acceptance of each SWPS-N and their ability to produce sound welds in conformance with the SWPS-N and all listed fabric ation documents by having the activity’s responsible official sign and date the SWPS -N prior to use. C-1.5 SWPS-N REVISIONS. From time to time, revisions to a SWPS-N may be issued. Activities having earlier revisions of SWPS-Ns are encouraged to use the most current SWPS-N revision, but may continue to use its earlier revisions unless that SWPS-N revision is withdrawn from use by AWS. Activities implementing new revisions shall
use the latest revision in effect at the time of their contract or order. C-2 PREREQUISITES TO PRODUCTION USE OF SWPS-NS.
Prior to production use of each SWPS-N, activities shall also complete the actions stated in C-2.1 through C-2.5. C-2.1 TEST WELDING AND INSPECTION. The activity shall weld and test one butt weld assembly following the SWPS-N requirements and the following: a. Pipe shall be used for test welding for SWPS-Ns primarily intended for pipe, and plate shall be used for SWPS-Ns primarily intended for plate. b. For plate assemblies, the weld length shall not be less than 12 inches in length. For pipe assemblies, the largest size used in production should be employed but need not be greater than nominal 3 inches in diameter. c. Test assembly thickness shall be at least ⅜ inch or, if the SWPS -N maximum thickness limit is lower, a lesser thickness may be welded. d. Test welding shall be in the 3G (plate), or 5G or 6G (pipe), positions for all position welding procedures. e. Joint design shall be any butt joint specified by the SWPS-N.
C-1
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