S9074-AQ-GIB-010/248 Rev 1
h. For cladding or hardfacing of cylindrical products 5 inches OD and less, a decrease in diameter from that used for qualification welding except as allowed by table 7-6, footnote 14 and figure 7-5, note 4. Also, for circumferential cladding in positions other than 1G or 2G, an increase in OD to greater than 5 inches when qualification was performed on an OD of 5 inches or less for either of the following cases: (1) For A-45 filler materials. (2) For cladding, where composition testing is required by the fabrication document or other component or system specification. i. Where qualification was performed on a plate-type product, a change to a cylindrical product (see table 7-4, footnote 7(a)(2)). j. A change in weld progression from vertical-down to vertical-up; for vice versa, see 4-8.h. 4-7.9.2 Shielded Metal Arc Welding. For shielded metal arc welding: a. A change in the nominal electrode diameter used for the first layer of weld. b. An increase greater than 10 percent in the amperage used in application for the first layer. 4-7.9.3 For Processes Other Than Shielded Metal Arc Welding. For processes other than shielded metal arc welding, the following shall apply: a. The addition or omission of supplementary filler metal to the welding arc. b. For robotic, automatic, or mechanized welding, the addition or elimination of oscillation; a change greater than ±20 percent in the oscillation displacement used for qualification. However, a procedure qualified using a minimum oscillation displacement and a procedure qualified using a maximum oscillation displacement, with all other essential variables remaining the same, shall qualify for all weld bead oscillations in between. c. A change in the nominal cross-section of the electrode or supplementary filler metal greater than 10 percent. d. For gas tungsten arc welding, a change greater than 15 percent in the filler wire wattage used for qualification. Wattage refers to resistance-heated filler wire and is a function of current multiplied by voltage for a given wire stickout dimension. 4-7.10 REPAIR WELDS OF S-10H BASE MATERIALS. a. For S-10H base materials, repair welds that do not completely remove the initial welds and the associated base metal HAZs shall require qualification to the maximum extent and for the maximum number of weld repair cycles to be used on the production application. This testing may be reduced where post-repair heat treatment is involved, if approved by NAVSEA.
In order to accommodate this requirement, the repair welding technique shall be qualified in the manner of the thin plate described in 4-7.5.f except that after initial welding, the qualification assembly shall be cut and re-prepared with one bevel edge as close as practical to the original bevel and the other bevel edge with
approximately 3/16 inch weld deposit remaining. The test plates shall be re-welded for the maximum number of cycles of repair to be allowed during construction. 4-7.11 WELDS REQUIRING TEMPERATURE CONTROL (SEE 4-4.10). For welding on TCA (see 3-2.18) members, the changes specified by D-1.4.4 shall require requalification per Appendix D.
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