Dear friends, we had a case recently where wleders were grinding too much after first pass, so we had some cracks and it was hard to find the reason for them...
Ing. Luis Albanés M. El Salvador cel 503 70488959 Skype: albanes61 fax 1 303 479 6738
--- El sáb 27-nov-10, César Alexis Viteri Pérez <alexis_viteri@hotmail.com> escribió:
De: César Alexis Viteri Pérez <alexis_viteri@hotmail.com>
Asunto: RE: [MW:8410] Cracks in pipe wedling
A: materials-welding@googlegroups.com
Fecha: sábado, 27 de noviembre de 2010, 10:22
Dear C.Nagabhushanam Please find attached a WPS for a similar welding. According to my experience for heavy pipes, preheat , clamping time and time between passes can generate cracks, for instance during 4 first passes has not to be any movement of pipeline and time between them has to be short. Let a joint only with three or four passes for finishing in the next day is take a risk of cracks. I'm not a native speaker, so pls excuse my english. Regards
From: nagabhushanam@adorians.com To: materials-welding@googlegroups.com Subject: [MW:8400] Cracks in pipe wedling Date: Sat, 27 Nov 2010 12:34:54 +0530 Please advise me for 34 inch Dia and 20mm thickness pipe of 65X why the cracks are observed while using E 8010G & remedial action. Regards, C.Nagabhushanam
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