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Sunday, January 22, 2012

[MW:13544] Re: 13415] Filler welding for A351 Gr CD4 M Cu

Hello,

Goswami,

Tanks a lot for your message and I want to add somme details on the
subject,

It is a condensate pump which data is:

1) The pressure discharge is 240 bara,

2) The temperature is between 130°C and 140°C,

3) Pump type is Multi-cellular with 12 stages,

4) Piping material is A351 CD4 MCu, this is strange to me, because a
pump barred which operates in those conditions is made of stainless
steel.


My best regards,
BENADJAL Redouane
Project engineer (SONATRACH ALGERIA)


On 19 jan, 07:39, "rbenad...@avl.sonatrach.dz" <refazosa...@gmail.com>
wrote:
> Sir Goswami,
>
> Hello !
>
> Tanks a lot for your last message and I want to add some details on
> the subject.
>
> It is a condensate pump which data is:
>
> 1) The pressure discharge is 240 bara,
>
> 2) The temperature is between 130°C and 140°C,
>
> 3) Pump type is multicelulare with 12 stages,
>
> 4) Piping materials isA351CD4MCu; this seems strange to me, because
> a pump barred which operates in those conditions is made of stainless
> steel.
>
> Thanks in advance,
>
> Regards,
> BENADJAL Redouane
> Project engineer (SONATRACH Algeria)
>
> On 6 jan, 00:54, "pgoswami" <pgosw...@quickclic.net> wrote:
>
>
>
> >  Hello Benadjal,
>
> >  A351Cd4MCu.pdf
> > 129KAfficherTélécharger
>
> >  Stainless Q & A 2004-09-012-CD4MCu pump.pdf
> > 54KAfficherTélécharger
>
> > Cd4MCu is a cast duplex stainless steel with not so good weldability. Advice
> > would be to use matching filler wire /electrode. Recommendation is to
> > solution anneal the weld after welding, if the weld thickness is large,
> > typically over 1/2", or else weld with very good control over heat input and
> > interpass temperature.
>
> > Generally this grade of Duplex S.S ( which is added with Copper) is
> > preferred for corrosion resistance in acid media. What's the media in your
> > case?? . If the service media is such that choice of Cd4MCu is a must then
> > 308/308L filler metal would not match the corrosion requirements.
>
> > See the attached articles which explains the pros and cons on welding of
> > this alloy. The second one Q&A  is an extract from AWS-Welding Journal, and
> > explains this alloy in details.
>
> > I hope this would be of help to you.
>
> > Thanks.
>
> > Pradip Goswami,P.Eng.IWE
> > Welding & Metallurgical Specialist & Consultant
> > Ontario,Canada.
> > Email-pgosw...@sympatico.ca,
> > pgosw...@quickclic.net
>
> > -----Original Message-----
> > From: materials-welding@googlegroups.com
>
> > [mailto:materials-welding@googlegroups.com] On Behalf Of
> > rbenad...@avl.sonatrach.dz
> > Sent: Thursday, January 05, 2012 4:46 AM
> > To: Materials & Welding
> > Subject: [MW:13415] Filler welding forA351GrCD4M Cu
>
> > Good morning,
>
> > I chose type E308 & E 308 L filler welding forA351GrCD4M Cu material,
> > the choice was made, as per ASME Section II Part C code,
>
> > Question:  Is it a good choice?
>
> > Thanks.
>
> > Best regards.
> > BENADJAL Redouane
> > Project engineer (SONATRACH Algeria)
> > E-mail: refazosa...@gmail.com
>
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>
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>
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