No I don't think so Because as per QW 193.1 the mock up assembly shall essentially duplicate tube hole configuration & Tube to Tube sheet joint design.As you are changing the projection means you are changing the strength of weld required as per design calculation.
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-- On Tue, Apr 29, 2014 at 3:57 PM, Materials & Welding <materials-welding@googlegroups.com> wrote:
In fabrication drawing, Tube to tubesheet joint with 4mm projection.--
in the Mock-up/PQR, vendor kept 0.5mm projection, but fused the tube with the tubesheet.
Is vendor to provide mock-up with 4mm projection, or change only the WPS to show 4mm projection in the joint, with the same PQR.
as per QW 288 this is not an essential variable, hence in my opinion revision of WPS is OK.
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