Saturday, February 27, 2010

Re: [MW:4397] EEUMA 143

This specification covers recommended procedures for the tube end welding of tubes ranging from ½ in (15 mm) to 1½ in (40 mm) nominal diameter and from 1.6 mm to 4.1 mm wall thickness to tube plates of 15 mm and over, in ferritic and austenitic materials.

it covers materials, design, PQR, strength tests, leak testing, expansion etc.

On Sat, Feb 27, 2010 at 1:30 PM, Praphulla <praphulla.dp@gmail.com> wrote:
Dear All,
Can anyone help me to understand the requirements of EEUMA 143?
Do you have any reference article of EEUMA 143?
 
Thanks
Praphulla

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RE: [MW:4396] Pullout load calculation of tube to tube sheet weld

Mr. Ibrahim

 

Please refer Non Mandatory appendix A , of ASME section viii div 1.

 

Also as per UW 20, welded joints do not call for shear load calculation .

 

Regards

 

Prashanth

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Muhammed Ibrahim
Sent: Saturday, February 27, 2010 1:56 PM
To: materials-welding@googlegroups.com
Subject: [MW:4395] Pullout load calculation of tube to tube sheet weld

 

Hi Members,

 

Anybody have the pullout test load calculation of tube to tube sheet weld with different joint design?. If any articles avilable in pdf. please send.

Thanks & Regards
Muhammed Ibrahim PK

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[MW:4395] Pullout load calculation of tube to tube sheet weld

Hi Members,
 
Anybody have the pullout test load calculation of tube to tube sheet weld with different joint design?. If any articles avilable in pdf. please send.

Thanks & Regards
Muhammed Ibrahim PK

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[MW:4394] EEUMA 143

Dear All,
Can anyone help me to understand the requirements of EEUMA 143?
Do you have any reference article of EEUMA 143?
 
Thanks
Praphulla

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[MW:4393] RE: Failure of PQR in All Weld Tensile

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

Prashant .

 

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

 

Dear All,

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

Position -6G

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?

Pl. reply.

PSP  

 


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Re: [MW:4392] proposed wps

Hi,
F No. is 6. No P no. for consumables. P no. is for materials.
Thanks,
K.Rajagopal

On Fri, Feb 26, 2010 at 9:27 AM, Arshad Farooq Syed <arshad_farooq64@yahoo.com> wrote:
kindly advise me regarding the F NO AND P NO FOR ER-309L
 
 

Regards

 

Syed Arshad Farooq 

 QA / QC Engineer

 PROCTER & GAMBLE

 D.L UNIT KARACHI

(+92-21-111-284-284,5378637-40

): +92-308-3067599


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Re: [MW:4391] Aluminium Welding

Dear  Elshan,

Thanks a lot for your reply, I do have a DC MIG power source will give it a try on the GMAW process for the same. 

Regards,

Nimesh S Chinoy

On Mon, Feb 22, 2010 at 5:19 PM, Elshan Feyzullayev <elshan_f@hotmail.com> wrote:
Dear Nimesh,
 
I have practicied many welding processes and consumables for welding of 50xx and 60xx grade AL.
 
you can use both procedures TIG and GMAW.
 
if you use TIG your machine and power should be set up on AC.
 
if you use GMAW your power should be DC. try to use ESAB make ER5356 or 5183 gmaw wire in DC current.
 
the Al you want to weld is non heat treated alloy. with above written GMAW wires you can get a very good result but dont pass the interpass temperature which is required to be max 130 degree c.
 
best regards,
Elshan.
 

Date: Sat, 20 Feb 2010 17:10:13 +0530
Subject: [MW:4349] Aluminium Welding
From: nchinoy@gmail.com
To: materials-welding@googlegroups.com


Dear All,


Need to weld Aluminium of grade 5052 for 5mm thick plates in both BUTT and FILLET welding. Kindly suggest which type of power source (Arc, TIG, MIG) will be most suitable for this application. 

We tried using LH409 welding electrode (3.2mm ) in EP mode. We get a good weld result with BUTT joints but Fillet doesnt hold any strength , any reasons why ?

--
Nimesh S Chinoy

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Re: [MW:4390] Aluminium Welding

Dear Randy,

Thanks a lot for your reply.. clarifies a lot of points. 

Will give MIG welding a go and see the results.

Regards,

Nimesh S Chinoy

On Sat, Feb 27, 2010 at 4:54 AM, Dull, Randy <RDULL@ewi.org> wrote:
Mr Chinoy:

The electrode you used, LH 409, appears to be designed specifically for repair welding, and may be more suited for use on castings than for fabricating wrought aluminum plate.

Either TIG or MIG would be suitable processes for welding 5-mm thick 5052 plate, but MIG would generally be more productive.  The preferred filler metal or electrode alloy for welding 5052 would be 5356.

The low strength of the fillet welds made using LH 409 electrodes is likely due to incomplete fusion to the base metal.  Welding aluminum is more challenging than welding steel and most other metals due to the high thermal conductivity of the base metal.  It is difficult to achieve complete fusion, especially at the start of the weld, using conventional arc welding.  This is an area that TIG has an advantage, as you can hold the torch at the start until the weld pool is sufficiently large to add filler metal, thus ensuring better fusion to the base metal.

Randy

Randal M. Dull, P.E.
Engineering Team Leader - Arc Welding
EWI
1250 Arthur E. Adams Drive
Columbus, OH  43221
614.688.5095 (direct)
614.688.5001 (fax)
randy_dull@ewi.org
www.ewi.org



-----Original Message-----
From: Cooper, Kirk
Sent: Sunday, February 21, 2010 6:21 PM
To: Dull, Randy
Subject: FW: [MW:4349] Aluminium Welding

Randy - can you help?

Thanks,
Kirk
________________________________________
From: Ames, Nathan
Sent: Saturday, February 20, 2010 9:55 AM
To: Cooper, Kirk
Subject: Fwd: [MW:4349] Aluminium Welding

Thanks, Nate Ames

Technical Director | NFC
Eng. Team Leader | EWI
Mail: 1250 Arthur E. Adams Dr., Columbus OH 43221
Email: <mailto:names@ewi.org> names@ewi.org<mailto:names@ewi.org>
Cell: 614.578.7898

Begin forwarded message:

From: Nimesh Chinoy <nchinoy@gmail.com<mailto:nchinoy@gmail.com>>
Date: February 20, 2010 6:40:13 AM EST
To: "materials-welding@googlegroups.com<mailto:materials-welding@googlegroups.com>" <materials-welding@googlegroups.com<mailto:materials-welding@googlegroups.com>>
Subject: [MW:4349] Aluminium Welding
Reply-To: "materials-welding@googlegroups.com<mailto:materials-welding@googlegroups.com>" <materials-welding@googlegroups.com<mailto:materials-welding@googlegroups.com>>

Dear All,


Need to weld Aluminium of grade 5052 for 5mm thick plates in both BUTT and FILLET welding. Kindly suggest which type of power source (Arc, TIG, MIG) will be most suitable for this application.

We tried using LH409 welding electrode (3.2mm ) in EP mode. We get a good weld result with BUTT joints but Fillet doesnt hold any strength , any reasons why ?

--
Nimesh S Chinoy

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Friday, February 26, 2010

Re: [MW:4389] ferrite number of duplex stainless steel weld


Dear all,

Our welding consumables intended for use in duplex stainless steels will normally give a weld metal with FN 35 -50.  The weld metal mechanical properties are strongly dependent on ferrite number. Higher ferrite numbers, > 50, gives higher tensile strength, lower elongation and maybe also lower Charpy values.

Welding with too low heat input will give a weld metal with too high FN, resulting in bad mechanical properties. Too high heat input will give too much brittle intermetallic phases. Since the ferrite is transformed into brittle intermetallic phase, the FN measured in the weld will be low..

Measurement of ferrite number in real weldment can be carried out with a precision of +/-10%, according to investigations carried out by IIW.


Best regards,


Claes Gillenius
Development Engineer, MMA. (Spec. stainless and non Fe-alloys)
Direct tel:  +46 (0)31 509315
Mobile +46 (0)707532012
Company                ESAB AB
Address                  Box 8004, 402 77  Gothenburg, Sweden
                                 Lindholmsallén 9
Company  reg number        556005-7738



pankaj.johri@in.transport.bombardier.com
Sent by: materials-welding@googlegroups.com

2010-02-26 06:15

Please respond to
materials-welding@googlegroups.com

To
materials-welding@googlegroups.com
cc
Subject
[MW:4375] ferrite number of duplex stainless steel weld






Hi,


We are welding duplex stainless steel.


To control the parameters of welding, we are measuring ferrite number of weld.


Can anybody tell us how acceptable values of ferrite numbers are decided.



Regards,

Pankaj



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RE: [MW:4387] ferrite number of duplex stainless steel weld

Anywhere between 40-60 for the weld and 35-55 for the HAZ should be acceptable... But the client normally has the last word on this issues.

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Sukamal Naskar
Sent: 26 February 2010 05:22
To: materials-welding@googlegroups.com
Subject: Re: [MW:4376] ferrite number of duplex stainless steel weld

Optimum is 50FN, but 40 ~ 70 FN will be acceptable , but still it depends on the client's technical specifications.

Regards,

On 2/26/10, pankaj.johri@in.transport.bombardier.com
<pankaj.johri@in.transport.bombardier.com> wrote:
> Hi,
>
> We are welding duplex stainless steel.
>
> To control the parameters of welding, we are measuring ferrite number
> of weld.
>
> Can anybody tell us how acceptable values of ferrite numbers are decided.
>
>
> Regards,
>
> Pankaj
>
>
> Please consider the environment before you print / Merci de penser à
> l'environnement avant d'imprimer
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Re: [MW:4386] RE: 4381] Failure of PQR in All Weld Tensile

Dear Sir,
I got 525Mpa in Partial Repair & 657/643 Mpa in main welding procedure with same E series.
So what care should be taken duing Thru. Repair Procedure?
Pl. reply.
PSP


From: Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com>
Subject: [MW:4384] RE: 4381] Failure of PQR in All Weld Tensile
To: materials-welding@googlegroups.com
Date: Friday, 26 February, 2010, 12:56 PM

Change the consumable brand, all E70XX series may not give the higher UTS
thou AWS classification (E70XX series Min 490Mpa required as per code)  is same. There are prescribed consumables for API X grade like Bolher Fox series, BÖHLER FOX EV Pipe etc may give higher UTS, check with your consumable manufacturer and ask for this specific requirement, while sourcing consumable. or use higher TS grades like E9018M


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of prashant pansare
Sent: Friday, February 26, 2010 12:39 PM
To: mat wel
Cc: par kat; roj abra
Subject: [MW:4381] Failure of PQR in All Weld Tensile

Dear All,
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
Position -6G
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?
Pl. reply.
PSP  

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Re: [MW:4385] Failure of PQR in All Weld Tensile

Weld Meatal.
PSP

On Fri, 26/2/10, george.dilintas@gr.bureauveritas.com <george.dilintas@gr.bureauveritas.com> wrote:

From: george.dilintas@gr.bureauveritas.com <george.dilintas@gr.bureauveritas.com>
Subject: Re: [MW:4382] Failure of PQR in All Weld Tensile
To: "materials-welding" <materials-welding@googlegroups.com>
Date: Friday, 26 February, 2010, 12:48 PM

Where do you get the failure? Base or weld metal?

  From: prashant pansare [prashantpan_99@yahoo.co.in]
  Sent: 26/02/2010 12:39 ZE5B
  To: mat wel <materials-welding@googlegroups.com>
  Cc: par kat <paresh.katvi@bg-group.com>; roj abra <roji.abraham@bg-group.com>
  Subject: [MW:4381] Failure of PQR in All Weld Tensile

Dear All,
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
Position -6G
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?
Pl. reply.
PSP  


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[MW:4384] RE: 4381] Failure of PQR in All Weld Tensile

Change the consumable brand, all E70XX series may not give the higher UTS
thou AWS classification (E70XX series Min 490Mpa required as per code)  is same. There are prescribed consumables for API X grade like Bolher Fox series, BÖHLER FOX EV Pipe etc may give higher UTS, check with your consumable manufacturer and ask for this specific requirement, while sourcing consumable. or use higher TS grades like E9018M


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of prashant pansare
Sent: Friday, February 26, 2010 12:39 PM
To: mat wel
Cc: par kat; roj abra
Subject: [MW:4381] Failure of PQR in All Weld Tensile

Dear All,
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
Position -6G
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?
Pl. reply.
PSP  

Re: [MW:4383] Failure of PQR in All Weld Tensile

Hi,
make sure the current, voltage and travel speed is within the limit of manufacturer recommendation.
When making all weld tensile specimen there should be uniform finish on the specimen.
 
regards,
Ibrahim


 
On 26 February 2010 07:09, prashant pansare <prashantpan_99@yahoo.co.in> wrote:
Dear All,
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
Position -6G
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?
Pl. reply.
PSP  


Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!.

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Re: [MW:4382] Failure of PQR in All Weld Tensile

Where do you get the failure? Base or weld metal?


  From: prashant pansare [prashantpan_99@yahoo.co.in]
  Sent: 26/02/2010 12:39 ZE5B
  To: mat wel <materials-welding@googlegroups.com>
  Cc: par kat <paresh.katvi@bg-group.com>; roj abra <roji.abraham@bg-group.com>
  Subject: [MW:4381] Failure of PQR in All Weld Tensile


Dear All,
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
Position -6G
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?
Pl. reply.
PSP  


Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!.

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[MW:4381] Failure of PQR in All Weld Tensile

Dear All,
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
Position -6G
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?
Pl. reply.
PSP  


Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!.

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[MW:4380] ferrite number of duplex stainless steel weld

Hi,
We have a different understanding for the generally, the oil & gas industry, the percent ferrite should be between 35 - 60% and the FN from 4 - 8

We would assume you are using Ferritscope MP 30 for the measurement


David Chan
~~~~~~~~~~~~~~~~~~~~~~~~~~
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Sukamal Naskar
Sent: Friday, February 26, 2010 1:22 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:4376] ferrite number of duplex stainless steel weld

Optimum is 50FN, but 40 ~ 70 FN will be acceptable , but still it
depends on the client's technical specifications.

Regards,

On 2/26/10, pankaj.johri@in.transport.bombardier.com
<pankaj.johri@in.transport.bombardier.com> wrote:
> Hi,
>
> We are welding duplex stainless steel.
>
> To control the parameters of welding, we are measuring ferrite number of
> weld.
>
> Can anybody tell us how acceptable values of ferrite numbers are decided.
>
>
> Regards,
>
> Pankaj
>
>
> Please consider the environment before you print / Merci de penser à
> l'environnement avant d'imprimer
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[MW:4379] RE: 4377] F NO AND A NO FOR ER-309L

F#6 and A#8, P no is applicable only for base material (P#8 for 300 series ASS)


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Arshad Farooq Syed
Sent: Friday, February 26, 2010 10:57 AM
To: materials-welding@googlegroups.com
Subject: [MW:4377] proposed wps

kindly advise me regarding the F NO AND P NO FOR ER-309L
 
Regards

Syed Arshad Farooq 

 QA / QC Engineer

 PROCTER & GAMBLE

 D.L UNIT KARACHI

(+92-21-111-284-284,5378637-40

): +92-308-3067599


[MW:4378] RE: 4375] ferrite number of duplex stainless steel weld

What grade of duplex it is? and what process you are using? you want general acceptable values or how to control FN in the weld? what is your process fluid?

Chemical composition, welding and heat treatment are process parameters that determine the properties. To control all these parameters, some specifications are “over-specified”, which sometimes lead to conflicting requirements. One example is when an over-alloyed filler wire with 9% Ni is required for the longitudinal weld, and nitrogen is added to the gas for pitting resistance, in which case the ferrite content after heat treatment may fall below 30% in the weld. Most specifications allow minimum 30% ferrite in the weld, due to an expected risk for SCC, in spite of that the risk for SCC being negligible in the intended process environment.

For duplex steels the ferrite content is largely depending on the chemical composition and the thermal history. For the parent steel it is controlled within a fairly narrow range. In many cases the measuring methods commonly used give a greater variation than the process variation. The influence of variation (+/–15%) of the phase balance on properties such as tensile strength and corrosion resistance is small. The second generation of duplex stainless steels is in general aimed to contain 40 – 50 % ferrite in the parent steel resulting in optimum properties. No ferrite content is prescribed in the international standards. There are, however, other specifications requesting a ferrite range.

The most common specified ranges are 40–60% for the parent metal and 30–60% for the weld area. However, some of the most experienced end users of duplex and superduplex steels are using the Norwegian standard NORSOK that specifies 35–55% for the base metal and 25–60% for the weld area. The general opinion is that a too high ferrite content, i.e. >70%, decreases the toughness and pitting resistance, and a too low ferrite content, i.e. < 25%, decreases the SCC-resistance. What really matters is that the corrosion resistance and mechanical properties fulfill the engineering requirements. The ferrite content is not a property, but a way to check that the welding and heat treatment have been properly done. Therefore the limits should be within a reasonable range and be used for control only, and in case of deviation lead to an extra check of the material properties.

Source: ISSN 1101–0681. Teknisk information/Centrumtryck Avesta 2000



From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of pankaj.johri@in.transport.bombardier.com
Sent: Friday, February 26, 2010 10:43 AM
To: materials-welding@googlegroups.com
Subject: [MW:4375] ferrite number of duplex stainless steel weld
We are welding duplex stainless steel.

To control the parameters of welding, we are measuring ferrite number of weld.

Can anybody tell us how acceptable values of ferrite numbers are decided.

Regards,

Pankaj
 

[MW:4377] proposed wps

kindly advise me regarding the F NO AND P NO FOR ER-309L
 
 

Regards

 

Syed Arshad Farooq 

 QA / QC Engineer

 PROCTER & GAMBLE

 D.L UNIT KARACHI

(+92-21-111-284-284,5378637-40

): +92-308-3067599


Re: [MW:4376] ferrite number of duplex stainless steel weld

Optimum is 50FN, but 40 ~ 70 FN will be acceptable , but still it
depends on the client's technical specifications.

Regards,

On 2/26/10, pankaj.johri@in.transport.bombardier.com
<pankaj.johri@in.transport.bombardier.com> wrote:
> Hi,
>
> We are welding duplex stainless steel.
>
> To control the parameters of welding, we are measuring ferrite number of
> weld.
>
> Can anybody tell us how acceptable values of ferrite numbers are decided.
>
>
> Regards,
>
> Pankaj
>
>
> Please consider the environment before you print / Merci de penser à
> l'environnement avant d'imprimer
>
> _______________________________________________________________________________________________________________
>
> This e-mail communication (and any attachment/s) may contain confidential
> or privileged information and is intended only for the individual(s) or
> entity named above and to others who have been specifically authorized to
> receive it. If you are not the intended recipient, please do not read,
> copy, use or disclose the contents of this communication to others. Please
> notify the sender that you have received this e-mail in error by reply
> e-mail, and delete the e-mail subsequently. Please note that in order to
> protect the security of our information systems an AntiSPAM solution is in
> use and will browse through incoming emails.
> Thank you.
> _________________________________________________________________________________________________________________
>
>
> Ce message (ainsi que le(s) fichier(s)), transmis par courriel, peut
> contenir des renseignements confidentiels ou protégés et est destiné à
> l?usage exclusif du destinataire ci-dessus. Toute autre personne est, par
> les présentes, avisée qu?il est strictement interdit de le diffuser, le
> distribuer ou le reproduire. Si vous l?avez reçu par inadvertance,
> veuillez nous en aviser et détruire ce message. Veuillez prendre note
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>
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[MW:4375] ferrite number of duplex stainless steel weld


Hi,

We are welding duplex stainless steel.

To control the parameters of welding, we are measuring ferrite number of weld.

Can anybody tell us how acceptable values of ferrite numbers are decided.


Regards,

Pankaj
 
 

Please consider the environment before you print / Merci de penser à l'environnement avant d'imprimer

_______________________________________________________________________________________________________________
This e-mail communication (and any attachment/s) may contain confidential or privileged information and is intended only for the individual(s) or entity named above and to others who have been specifically authorized to receive it. If you are not the intended recipient, please do not read, copy, use or disclose the contents of this communication to others. Please notify the sender that you have received this e-mail in error by reply e-mail, and delete the e-mail subsequently. Please note that in order to protect the security of our information systems an AntiSPAM solution is in use and will browse through incoming emails.
Thank you.
_________________________________________________________________________________________________________________

Ce message (ainsi que le(s) fichier(s)), transmis par courriel, peut contenir des renseignements confidentiels ou protégés et est destiné à l’usage exclusif du destinataire ci-dessus. Toute autre personne est, par les présentes, avisée qu’il est strictement interdit de le diffuser, le distribuer ou le reproduire. Si vous l’avez reçu par inadvertance, veuillez nous en aviser et détruire ce message. Veuillez prendre note qu'une solution antipollupostage (AntiSPAM) est utilisée afin d'assurer la sécurité de nos systèmes d'information et qu'elle furètera les courriels entrants.
Merci.
_________________________________________________________________________________________________________________

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[MW:4374] RE: 4338] Robot - WOPQ?

which of these is true in your case. in my opinion for 1 below no WO hence WOPQ not required

1. Welding with equipment which performs the welding operation without adjustment of the controls by a welding operator. except for the loading and unloading of the work.

2. Welding with equipment that has controls that are manually adjusted by the welding operator in response to visual observation of the welding, with the torch, gun, or electrode holder held by a mechanical device.



From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL
Sent: Thursday, February 25, 2010 9:36 PM
To: materials-welding@googlegroups.com
Subject: [MW:4338] Robot - WOPQ?

Dear All

We have a typical situation.
We want to do overlay by FCAW and want to deploy robot for this i.e by automatic welding.
The construction code is ASME Sec VIII Div.1

Now as per ASME Sec VIII Div1, UW29(b)(2)-- "when welding is done by any automatic welding process, performance qualification testing is not required".
So do we need not do any WOPQ ?? Is performance qualification required or not ??
Pls.. advise..

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278


Thursday, February 25, 2010

Re: [MW:4373] Robot - WOPQ?

Dear Prem,
Operator qualification is required.
 
Regards,
Ibrahim

On 25 February 2010 16:05, PREM SHANKARDUTT NAUTIYAL <prem_nautiyal@rediffmail.com> wrote:
Dear All

We have a typical situation.
We want to do overlay by FCAW and want to deploy robot for this i.e by automatic welding.
The construction code is ASME Sec VIII Div.1

Now as per ASME Sec VIII Div1, UW29(b)(2)-- "when welding is done by any automatic welding process, performance qualification testing is not required".
So do we need not do any WOPQ ?? Is performance qualification required or not ??
Pls.. advise..

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

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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.



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Thanks & Regards
Muhammed Ibrahim PK

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[MW:4388] RE: 4338] Robot - WOPQ?

The section you cite does not apply to overlay welding.  It only applies to studs,  insulation pins, fins, etc.
 
Paragraph UW-29 (b) defines what the exemption applies to:  " The welder and welding operators used in welding non-pressure attachments, which have essentially no load carrying function (such as extended heat transfer surfaces, insulation support pins, etc.) to pressure parts shall comply with . . ."
 
Weld overlay does not meet the criteria above so your welding operators will have to be qualified appropriately per Sc IX.
 
John Henning


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL
Sent: Thursday, February 25, 2010 10:06 AM
To: materials-welding@googlegroups.com
Subject: [MW:4338] Robot - WOPQ?

Dear All

We have a typical situation.
We want to do overlay by FCAW and want to deploy robot for this i.e by automatic welding.
The construction code is ASME Sec VIII Div.1

Now as per ASME Sec VIII Div1, UW29(b)(2)-- "when welding is done by any automatic welding process, performance qualification testing is not required".
So do we need not do any WOPQ ?? Is performance qualification required or not ??
Pls.. advise..

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

--
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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.

[MW:4338] Robot - WOPQ?

Dear All

We have a typical situation.
We want to do overlay by FCAW and want to deploy robot for this i.e by automatic welding.
The construction code is ASME Sec VIII Div.1

Now as per ASME Sec VIII Div1, UW29(b)(2)-- "when welding is done by any automatic welding process, performance qualification testing is not required".
So do we need not do any WOPQ ?? Is performance qualification required or not ??
Pls.. advise..

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

--
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Re: FW: [MW:4371] DSS REPAIR WELDING PROCEDURE

Dear Rutvik and Pradip,

As addition on the remarks of Pradip especially regarding "you may use
cast material" the following: Welding procedure qualifications
according to ASME section IX are not allowed as base for WPS
qualifcation in casting repairs according to ASTM A995. This
specification clearly mention under chapter 11 that all procedures and/
or welders need to be qualified according to ASTM A488. This
specification is especially for casted materials and requires
qualification on casted base materials only so often this is not the
case for ASME section IX qualifications. Chemical composition also
need to be similar to the material to be weld. If the comapny has no
qualification according the ASTM A488 they are not allowed to execute
any repair.

Best Regards,

Herman Pieper

On 24 feb, 19:10, <pgosw...@sympatico.ca> wrote:
> Hi Rutvik,
>
> ASTM A 995 GR.4A(DSS) is 22Cr-5Ni-Mo-N(UNS-J92205) duplex casting. The matching chemistry for this product is ASME  -SA-240 S31803 (in plate),  and in pipes SA-790. However many a times castings would have a lot of unbalanced chemistry due many factors e.g.: manufacturing technique, shapes, irregular cooling rates, responses to heat treatment etc. That's why welding on duplex castings are always more difficult then welding on plates or  pipes.
>
> Duplex stainless steels are very good alloys  with a good  combination of enhanced mechanical properties and corrosion resistance when properly balanced in composition and properly heat treated. Generally they develop a range of approximately 30 to 60% ferrite with the balance austenite.
>
> In your case, the manufacturer have a welding procedure which meets the requirements of ASME Sec-IX. But client's requirements or any specification requirement are over and above the code requirements, due to the facts that they are service application specific. If client requires  the flowing tests as mentioned below, your vendor (casting shop) has to redo the qualification test. It may be done  by preferably weld a  supplementary test coupon to the existing PQR and performing tests such as ferrite count,  pitting corrosion , detection of sigma phase and other intermetallic phases. It is not necessary to repeat the mechanical tests.
>
> In order to perform a supplementary weld coupon:-
> ·         Weld a test coupon following  exactly the welding parameters of existing and qualified PQR. Duplex S.S requires a good control on welding heat input.
> ·         You may use casting materials (if available as spare) or plate or pipes of equivalent composition and properties.
> ·         Perform ferrite count - ASTM-E-562
> ·         Detection of any intermetallic/sigma phases-ASTM-E-923
> ·         Pitting Corrosion Test- according to ASTM G-48
> ·         Meet any other test requirements as asked by  your client.
>
> ASTM –A-995 Clause -12. recommends stress relieving of duplex S.S castings, if the weld repair is major (i.e. if the depth of repair is over 20% of actual wall thickness or 1 inch, whichever is smaller). Should the weld repair calls for stress relieve as per A-995, then a completely new PQR shall be established, meeting  all Sec-IX mechanical tests, plus the other tests as mentioned above. Usually ASTM-A-488 is the guiding document for qualification of welding procedures for casting repair.
>
> Note : ASTM-A-995 –Supplementary requirements S-1 through S-51  describes some of the additional testing as required by your client.
>
> Hope my response clarifies the issue.
>
> You may download these free documents for your reference:-
> ·          http://www.imoa.info/_files/stainless_steel/Duplex_Stainless_Steel_2d.... This is a comprehensive document on duplex S.S.
>
> Thanks.
>
> Pradip Goswami, P.Eng.
> Welding & Metallurgical Engineer/Specialist
> Component Integrity Section.
> Engineering and Training Services
> Ontario Power Generation Inc.
> Res:-88,Garth Trails Crescent
> Hamilton,Ontario, L9B2X1,Canada
> Email-pgosw...@sympatico.ca
> Email-pgosw...@quickclic.net
> Tel-905-679-9677
>
>
>
> -----Original Message-----
> From: materials-welding@googlegroups.com
>
> [mailto:materials-welding@googlegroups.com] On Behalf Of rutvik dixit
> Sent: Tuesday, February 23, 2010 12:45 PM
> To: materials-welding@googlegroups.com
> Subject: [MW:4366] DSS REPAIR WELDING PROCEDURE
>
> Hi everyone,
> I need to inspect the castings of ASTM A 995 GR.4A(DSS). Now mfr. is having the approved/qualified wps for repair work. This material (castings) is
> having other requirements like ferrite content, pitting corrosion resistant test, sigma phase, total of intermetallic phases. The qualified wps doesn't consist these metallurgical tests, but having all mechanical and impact test. can mfr. go ahead with this wps for repair work? wps is having any
> relationship with these type of metallurgical tests?
>
> With regards,
> Rutvik
>
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[MW:34820] RE: 34813] Clarification in Rate of heating and cooling.

Hello,   Please see the response below.   Regards.   P. Goswami, P. Eng, IWE.   From: materials-welding@googlegroups.com <materials-weld...