S9074-AQ-GIB-010/248 Rev 1
Table 7-10. Performance Qualification Test Limitations 7/, 12/ - Continued
NOTES:
11/ Qualification with joint-A, figure 7-26, qualifies plasma arc, keyhole technique welds on plate up to 1/4 inch thickness for square butt joints and up to 3/16 inch land for groove welds. Maximum plate thickness qualified with joint-B will depend on accessibility of plasma arc torch into weld groove. Weld groove can be modified to use a compound angle to permit plasma arc welding in plate thicknesses greater than 3/4 inch. 12/ Fillet welders are not qualified for socket welds. Tack welders and fillet welders are not qualified for tack welding socket welds on pipe with thickness less than 3/16-inch. 13/ For gas tungsten arc welding qualification using 1 inch NPS Sch 80, consumable insert assembly qualifies for all thicknesses 0.058 inch and greater. 14/ For robotic, automatic, and mechanized welding, qualification in either thickness range qualifies for thicknesses 0.058 inch and greater. 15/ (a) For required test assemblies, see 5-3.5 for tube-to-tubesheet welds, seal welds, and socket welds and 5-3.6 for tube-to-header seal welds for boiler components. (b) For socket and fillet type seal welds performed with manual and semiautomatic processes on pipe with nominal wall thickness in the range of 0.058 to less than 3/16-inch, the following shall apply: (1) The minimum thickness qualified shall be the greater of 20 percent below the nominal pipe wall thickness welded or 0.058 inch. (2) For pipe sizes other than 1/2 inch NPS schedule 10 (see 5-3.5.1.d), weld test OD vs qualified OD (in inches) shall be as follows: <1 tested qualifies OD welded and greater; ≥1 but < 2 -7/8 tested qualifies 1 and greater; ≥ 2 -7/8 qualifies 2-7/8 and greater. For mechanized, automatic, and robotic welding, any thickness less than 3/16 inch and any diameter shall be welded and shall qualify all thicknesses of 0.058 inch and greater, and all diameters. For all methods, where thickness is below 0.058-inch, the minimum qualified thickness is the nominal thickness welded. There is no maximum thickness limit for socket and fillet seal welds in pipe. 16/ T is the test base material thickness welded. For solid cylindrical products (shafting, etc.), pipe of the appropriate size can be used for qualification welding. Qualification limits for weld layers/thickness shall also apply as follows:
Minimum Qualified Weld Layers/Thickness (for Welding Operators see 5-6.2.h)
Maximum Qualified Weld Thickness
Production Weld Type
Hardfacing: For finish machined production welds at least 3/16 inch thick and 2 layers minimum For finish machined production welds not meeting the above criteria
2 times the weld thickness at which PT and macro testing are performed or 3/8 inch, whichever is greater.
2 layers and 3/16 inch
The number of weld layers and thickness at which hardness testing is performed.
Cladding, without composition testing (see 5-3.4.c), all: N/A Cladding with composition testing (see 5-3.4.c): For finish machined production welds at least 3/16 inch thick and 2 layers minimum
N/A
2 layers and 3/16 inch
N/A
For finish machined production welds not meeting the above criteria
The number of weld layers and thickness at which composition testing is performed.
N/A
Buttering, all:
N/A
N/A
17/ For cladding where composition is not required, and buttering, a butt weld test may be used.
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