S9074-AQ-GIB-010/248 Rev 1
Table 7-6. Welding Procedure Qualification Material Thickness and Diameter Limits 1/, 2/, 4/, 7/, 8/, 9/, 10/, 11/, 12/ - Continued
NOTES (continued): (h) For buttering beneath cladding or hardfacing, there are no thickness limits, but see 4-4.2 for qualified number of layers. For other buttering, T shall be as follows: (1) For buttered inlays (e.g., for tee joints, an inlay in the flange interfacing with the web), T shall be the thickness of the inlay. (2) For all other cases, T is the thickness of the buttered joint member. (i) For lock welds on pressurized thin material, see 4-4.9. 3/ Not applicable to root layer qualification (see 4-4.1.5) or to autogenous welds (see 4-4.5). 4/ The maximum thickness qualified shall be 1.10 times the thickness of the test assembly for any of the following conditions: (a) When the weldment requires quenching and tempering. (b) When single pass welding is used for full penetration groove welds. (c) When weld pass thickness is greater than 1/2 inch. (d) When the short circuiting mode of gas metal arc welding is used for groove welds; for fillet welds, the 1.1 upper limit shall apply to base metal thickness and weld throat thickness. (e) When ferrous base metals (except S-7 and S-8) are subjected to PWHT exceeding the upper transformation temperature. 5/ “Other” includes all material other than pipe (such as structural plate, shapes, and castings) except for stud welding. 6/ For socket and fillet seal welds (other than robotic, automatic, or mechanized) on pipe with wall thicknesses in the range of 0.058 to 3/16 inch, the minimum wall thickness qualified shall be the greater of 0.058 inch or 20 percent below the pipe wall thickness welded and maximum thickness shall be 2T; for robotic, automatic, and mechanized welding, see footnote 13 below. 7/ See 4-4.1.15 for qualified thickness where multiple processes are used on one joint. 8/ When the production application is for thicknesses of 1/2 inch and greater and the material is one requiring impact testing (such as S-11 materials), the qualification test assembly shall be of a sufficient thickness and size to permit preparation of impact test specimens (see table 7-7, footnote 2). 9/ Where qualification is performed on a base material without toughness requirements and cross-qualification is permitted for materials having toughness requirements, welding of the materials with toughness requirements shall be limited to material thicknesses less than 1/2 inch when greater thicknesses are otherwise qualified. 10/ Qualified sizes and base metal thicknesses for fillet welds are as follows: (a) Groove and socket welds and fillet welds per 4-4.1.11 and 4-4.1.12 qualify all sizes of fillet welds and fillet weld base metal thickness of 0.058 inch and greater. (b) Fillet weld base metal thickness may be extended below 0.058 inch by completing a groove, socket, or fillet weld test of the production thickness (with maximum qualified fillet weld base metal thickness equal to twice the thickness welded). 11/ For S-10H materials, the maximum and minimum qualified thickness shall be the thickness used during qualification; maximum qualified thickness shall be the thickness used during qualification up to 1.5 inches, and for qualification plate thicknesses of 1.5 inches and greater, the thickness limits of this table for other materials shall apply. See also 4-7.5.f. 12/ For welds in S-51, S-52, S-53, and S-53A materials made outside of a chamber, the maximum thickness qualified below 2 inches is twice the thickness of test plate or depth of groove, whichever is smaller, welded during qualification. Qualified thicknesses 2 inches and above require that the test plate be at least 90.9 percent of the maximum thickness to be welded.
(Footnotes continued on next page.)
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