Roji (Guru), U r correct, but I m intrested in UTS & also I got all weld tensile values @ 549 / 567 Mpa in main welding procedure & 545 / 525 Mpa in Partial Repar procedure with the same electrode. Is there any effect of welding at the same position two times while Thru Thk. re-repair. Pl. reply PSP
--- On Fri, 26/2/10, Abraham, Roji <Roji.Abraham@bg-group.com> wrote:
From: Abraham, Roji <Roji.Abraham@bg-group.com>
Subject: RE: Failure of PQR in All Weld Tensile
To: "prashant pansare" <prashantpan_99@yahoo.co.in>
Cc: "Katvi, Paresh" <Paresh.Katvi@bg-group.com>, "sol grea" <solutions.great@gmail.com>
Date: Friday, 26 February, 2010, 2:25 PM
Why r u using DNV OS F101 2000 INSTEAD OF 2007. 1. Verify that the Yield stress of the weld metal is more than 80 Mpa than the SMYS of the base material. Check Appendix- C page 167 C302 , where it states that the YS of the metal should be minimum 80 MPA above the SMYS of the base material. If YS of electrode is not more than the base material then the selection of the electrode is incorrect. 2. Also verify what's the all weld tensile value you have got for the electrode specified in the electrode MTC. Rdgs Roji From: prashant pansare [mailto:prashantpan_99@yahoo.co.in]
Sent: Friday, February 26, 2010 12:39 PM
To: mat wel
Cc: Katvi, Paresh; Abraham, Roji
Subject: Failure of PQR in All Weld Tensile We are working on PQR & deatails are as folows : Appl. Code - DNV OS F101,2000 PQR - Through THickness Repair. (SMAW) Base Metal - API 5L X GRADE 60 - 12.75" OD X 14.3 mm THK. Filler Metal - E-7018 H4R After mechanical tests, we are getting all values in acceptable limits except All Weld Tensile results.(Reqd- 517 Mpa & Actual - 483 / 493 Mpa) What is the reason & solution for the same? |
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