PQR Supplementary Essential Variable Changes Requiring WPS

AWS D1.1 2015 Table 4.6 Line 6 “A change in position to vertical up. A 3G vertical up test qualifies for all positions and vertical down.”.

Yes, you may raise more questions in WPS when WPS reviewing process

  • 3G vertical position
  • 5G vertical position

These position shall not cover to all positions, in vertical position where to take highest heat input and CVN test specimen required, see Figure 4.6 and Figure 9.19.

:vertical_traffic_light: Please take note that Table 4.6 are in addition to Table 4.5.

So, the positional qualifications shall be in accordance with Table 4.1 (for non-tubular) or Table 9.9 (for tubular), which PQR application.

Also see commentary C-4.8

Table 4.6 lists the supplementary essential variable requirements for PQR qualification where CVN testing is required by contract documents. The requirements of Table 4.6 are in addition to the essential variable requirements of Table 4.5. The essential variable requirements of Table 4.5 should be fully met for procedure qualification without CVN testing and the essential variables of Table 4.6 should be fully met to further qualify the PQR to meet CVN testing requirements. The requirements of Table 4.6 do not change any of the requirements in Table 4.5. In Table 4.6, the Essential Variable on line 6 eliminates the need for CVN testing in all positions but does not change the requirements of Table 4.5 regarding welding positions. All WPS qualification requirements for strength and soundness according to Table 4.5 are still required.

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