188.8.131.52 WPSs without Prequalified Status. For a
WPS whose essential variables are outside the prequali-
fied range, qualification for CJP tubular groove welds
shall require the following:
(1) Qualification in conformance with Figure 9.25 for
pipes with outside diameters greater than or equal to 4 in
[100 mm] or Figure 9.25 and Figure 9.27 for box tubes.
Qualification in conformance with Figure 9.26 for pipes
with outside diameters less than 4 in [100 mm] or Figure
9.26 and Figure 9.27 for box tubes.
(2) A Sample Joint or Tubular Mock-Up. The sample
joint or tubular mock-up shall provide at least one mac-
roetch test section for each of the following conditions:
(a) The groove combining the greatest groove
depth with the smallest groove angle, or combination of
grooves to be used: test with welding position vertical.
(b) The narrowest root opening to be used with a
37.5° groove angle: one test welded in the flat position
and one test welded in the overhead position.
(c) The widest root opening to be used with a
37.5° groove angle: one test to be welded in the flat posi-
tion and one test to be welded in the overhead position.
(d) For matched box connections only, the mini-
mum groove angle, corner dimension and corner radius
to be used in combination: one test in horizontal position.
(3) The macroetch test specimens required in (1) and
(2) above shall be examined for discontinuities and shall
(a) No cracks
(b) Thorough fusion between adjacent layers of
weld metal and between weld metal and base metal
(c) Weld details conforming to the specified de-
tail but with none of the variations prohibited in 5.23.
(d) No undercut exceeding the values allowed in
(e) For porosity 1/32 in [1 mm] or larger, accumu-
lated porosity shall not exceed 1/4 in [6 mm]
(f) No accumulated slag, the sum of the greatest
dimension of which shall not exceed 1/4 in [6 mm]
Those specimens not conforming to (a) through (f) shall
be considered unacceptable; (b) through (f) not applica-
ble to backup weld.