One thing is clear and that the corrosion has spread on the flange also as on the pipe. The flange is a slip on flange .
Is the crack a full circumferential or is it limited to what the photo is showing?
Can we have the photo of the other 180 degree view?
From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> On Behalf Of Hernan Arturo Castillo Mier
Sent: 17 October 2019 17:18
To: materials-welding@googlegroups.com
Subject: [SOCIAL NETWORK] RE: Atención valide origen![MW:30159] Fwd: Nozzle crack propagation
Hello
Initially, in my opinion there is not SS flange, but you can check, by using the devise for that.
This corrosion evidence indicate that the material isn´t SS.
According to the picture, the crack is far away from the weld. We can suppose that that the failure in not associated to the welding process, but the material quality.
Hernán Castillo Mier
Ingeniero Senior Confiabilidad e Integridad
FACILITADOR AUTORIDAD TÉCNICA EQUIPO ESTÁTICO
INSPECTOR AUTORIZADO
API 510 (33119)
Avantel: 8*1571
Teléfono: 668-2396
De: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] En nombre de Chiranjeevi A
Enviado el: miércoles, 16 de octubre de 2019 3:32 PM
Para: materials-welding@googlegroups.com
Asunto: Atención valide origen![MW:30153] Fwd: Nozzle crack propagation
Dear All,
Please find the attached snap, we found a crack circumferentially. The nozzle size is 6" and the material is SS.
The following plant is under construction and the vessel erected around 1yr back. There is an argument that because of pipe loads that are not supported yet, it created tension and lead to crack. Even I surprised that how a steel material started cracked like brittle for just for a few external loads. (This not the correct reason)
I clearly explained that any steel material that we design to be below the yield value. When the load beyond the ultimate limit it leads to fatigue and finally crack. This situation we can expect in operation if there is cyclic loading and the connected piping not supported properly. (which is an impossible situation).
Finally, I suspect that
- the material of the nozzle is not SS. (Maybe zinc coated)
- (or) Because of corrosion
-
(or) during welding, it created a weaker section and started crack initiation for the external loads.
Experts kindly share your opinion and suggestions.
Thanks & Regards
--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAN4%2Bm0wDkxeQNHY0mBcit_VfEDhKueRp%2BWnURJehau-%3DXz_sPA%40mail.gmail.com.
Este mensaje puede contener información de tipo personal, clasificada o reservada; si usted no es el destinario, por favor, hacer caso omiso de su contenido y abstenerse de compartirlo, reenviarlo o copiarlo. Si recibe este mensaje por error, agradecemos informarlo inmediatamente al remitente y borrarlo permanentemente de su cuenta. Si usted está autorizado para recibir la información de tipo personal, se le recuerda que esta información debe ser manejada con la finalidad con la que ha sido solicitada y en virtud de la normativa que habilita el acceso a la misma. Así mismo, deberá ser usada bajo los parámetros de la ley 1581 de 2012 de protección de datos personales y la normativa que la desarrolla, siendo responsabilidad del área receptora del cumplimiento de la citada normativa de protección de datos personales. CONFIDENTIALITY NOTICE: This electronic transmission (including any files attached hereto) (this "Communication") contains information that is or may be legally privileged, confidential, and exempt from disclosure without our express permission in advance. The information is intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient or any employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any disclosure, dissemination, copying, distribution, or the taking of any action in reliance on the contents of this electronic Communication is strictly prohibited. If you have received this Communication in error, please notify the sender immediately and destroy permanently the transmitted information in its entirety and do not disclose its contents to any other person. Para conocer la Declaración de Tratamiento de Datos Personales de Ecopetrol, favor consultarla en www.ecopetrol.com.co Responsabilidad Corporativa – Declaración de Tratamiento de Datos Personales.
--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/BN6PR2201MB1092B64B565AF2CDCC5791FBDD6D0%40BN6PR2201MB1092.namprd22.prod.outlook.com.
No comments:
Post a Comment