Wednesday, January 19, 2011

Re: [MW:9332] Hardness Issue

Dear Edvardo,
We had a similar case in 1999 when we were running PQR. The hardness on the weld cap was around 270 HV10 against 248. Several attempts were made to achieve the target with control of heat input with consultation of a Welding Institute in Scotland. The final result of this qualification and R&D was that the C eq of the the pipe material used had the ruling effect. With a Ceq of o.42 it was impossbile to meet the project requirements. The suggested Ceq was 0.39 which no supplier could commit for that. 
 
To make the long story short, it was finally suggested to accept the hardness of  275 HV10 on the cap layer and 248 around root passes. This was accepted by Client. Now the hardness of 275 is easily set as acceptable value worldwide for obvious reasons.
You can search the web for papers on the subject. Let me know if I can help on this.
 
Regards
 
-----materials-welding@googlegroups.com wrote: -----

To: <materials-welding@googlegroups.com>
From: "Kathalingam Babu" <kathalingam.qaqc@ppl.com.sg>
Sent by: materials-welding@googlegroups.com
Date: 01/16/2011 05:53PM
Subject: Re: [MW:9248] Hardness Issue

Hi
 
It has to satisfy the requirement of H.7.3.3 (Page 113) of API 5L spec (2010 Ed.),
 
Thanks & Regards,
 
K. Babu
 

----- Original Message -----
Sent: Sunday, January 16, 2011 2:44 PM
Subject: Re: [MW:9235] Hardness Issue

Clava,
 
Just take 2,3 reading just near to high hardness value and check weather it repeats or not.If it does not repeat you can convince ur client.
 
Regards,
 
Manish Kulkanri

--- On Sat, 15/1/11, Eduardo Calva <eduardocalva@hotmail.com> wrote:

From: Eduardo Calva <eduardocalva@hotmail.com>
Subject: [MW:9228] Hardness Issue
To: materials-welding@googlegroups.com
Date: Saturday, 15 January, 2011, 11:40 PM


Dears:
 
Could you please tell me what can I do to solve this issue?:
 
1.- HV hardness requirement for X-60 1" wt pipeline girth welds: 248 HV
2.- Of 15 measurements one value reached 285 HV .
3.- The weld is under water righ now.
 
How can we solve this?, I think just to support, because we can't take the pipe out.
 
Regards.


Eduardo Calva



  > --
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
> For more options, visit this group's bolg at http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.


    This email and any attached files ("Message") may contain confidential and/or privileged information. It is intended solely for the addressee(s). If you receive this Message in error, inform the sender by reply email, delete the Message and destroy any printed copy. Any unauthorized use, distribution, or copying of this Message or any part thereof is prohibited. Emails are susceptible to alteration. Neither Technip nor any of its affiliates shall be liable for the Message if altered or falsified nor shall they be liable for any damage caused by any virus that might be transmitted with this Message. 

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

No comments:

Re: [MW:34832] Inquiry about Single Bevel with Back Grinding

Dear Uday, As per your question that one is called with backing only,Simple both side you are welding it is backing with strip or without st...