Friday, October 31, 2008

[MW:1263] Re: 1261] SS 1312(sweden)

 
Hi Raghuram,
 
Thanks for your quick response and sharing.
 
With kind regards,

A. Kiran Babu

Dir-Marketing

Magna Design Technologies Pvt Ltd

(formerly known as "Ice Cube Engineering Solutions Pvt Ltd")

Phone: +91 80 26764690,

Cell: 93424 10446

Mail: kiran@magnadts.com

web: magnadts.com

 
 


 
On Fri, Oct 31, 2008 at 2:28 PM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:


I suppose it is a CS corresponding equivalents are St37-2, ASTM A 36, BS40B. however your designer must verify the chem/mech properties before substitution

BR

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com]On Behalf Of Kiran
Sent: Friday, October 31, 2008 9:49 AM
To: Materials & Welding
Cc: kiranbabua@gmail.com
Subject: [MW:1261] SS 1312(sweden)



 I,m looking for alternate material as substitute for SS 1312. I
request group members to suggest... preferred per UN or ISO.

With best regards,

Kiran



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[MW:1262] RE: 1261] SS 1312(sweden)

I suppose it is a CS corresponding equivalents are St37-2, ASTM A 36, BS40B. however your designer must verify the chem/mech properties before substitution

BR

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com]On Behalf Of Kiran
Sent: Friday, October 31, 2008 9:49 AM
To: Materials & Welding
Cc: kiranbabua@gmail.com
Subject: [MW:1261] SS 1312(sweden)

I,m looking for alternate material as substitute for SS 1312. I
request group members to suggest... preferred per UN or ISO.

With best regards,

Kiran

CONFIDENTIALITY NOTICE
This e-mail and any attachments there to contain information, which is confidential, proprietary, privileged and/or protected from disclosure by intellectual property rights and are intended for the sole use of the recipient(s) named above. If you are not the intended recipient of this message you are hereby notified that any dissemination or copying of this message is strictly prohibited. If you have received this e-mail in error, please notify the sender either by telephone or by e-mail and delete it from any computer. Although this e-mail and any attachments thereto are believed to be free from any virus or other defects, which might affect any computer or IT system, it is the responsibility of the recipient to ensure that they are virus free. We are not liable for any loss or damage arising in any way from receipt or use there of. Thank you.

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[MW:1261] SS 1312(sweden)

I,m looking for alternate material as substitute for SS 1312. I
request group members to suggest... preferred per UN or ISO.

With best regards,

Kiran

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[MW:1259] Crossed welds

Hello everybody!

currently I'm reviewing the mechanical design of an ASME III Class 2
Heat exchanger.
The designer proposes a fixed tubesheet configuration where the shell
and channel are groove welded to the tube-sheet according to the code
allowed weld details. Additionally, one of the supports of the
equipment (saddle supports) has been placed near the shell-channel-
tubesheet joint. The saddle support is attached to the rest of the
equipment using a reinforcement pad which takes the whole angle of the
saddle support. The pad is planned to be fillet welded in the whole
perimeter so this implies that the two horizontal pad welds cross the
circumferential welds of the tubesheet. In this scenario I haven't
found any provision concerning this question in the code. Could
anybody report to me any experience about if this configuration is
code allowed or not, and in the case that the configuration would be
OK, please send me any comments about the suitability of this design.
I'm afraid that the proposed detail could lead to fast fracture
failure due to triaxial stress states.

Thanks in advance.

Regards.

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[MW:1260] Need information about Mica material.

Hi May any one help me for getting the properties like Young's Modulus, UTS, Yield, CTE, Poisson's ratio, Thermal Conductivity of Mica material.
 
Best Regards.
 
Ritesh

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Thursday, October 30, 2008

[MW:1258] flash welding

dear sir,
the hardness profile of HAZ ie., the hardness value will high in HAZ
or weld, for carbon steel of .1% carbon in flash butt weding
--
Ganeshkumar M

Mobile: 9442510888

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Effect of Carburizing Temperature on Carbon Penetration

Effect of Carburizing Temperature on Carbon Penetration The penetration of carbon into the steel in gas carburizing depends on the carburizing temperature, the time at temperature, and the carburizing agent. Because the solubility of carbon is greatest above the Ac3 temperature, carburization takes place most readily above this temperature. 
ole0.bmp


Furthermore, the higher the temperature is, the greater the rate of carbon penetration will be, because the rate of diffusion is greater. Thus, it is customary to select a temperature approximately 40°C (70°F) above the Ac3 point. The time at the carburizing temperature is the most influencing factor in the control of the depth of carbon penetration. Temperatures as low as 790°C and as high as 985°C (1450 and 1800°F) have been used for carburizing.   

[MW:1257] Re: 1253] RE: 1250] Re: HAZ

Dear All,
In some welding processes such as CRC welding /Narrow gap welding  it is even difficult to identify the HAZ and it becomes it very important to use hardness testing and we need to use HV 5 instead of HV 10 in order to determine hardness in HAZ which is more critical    in case of  low heat input welding process ( ref EPC 16 publication ).
Best Regards,

Francis lobo

----- Original Message -----

From: Bathula Raghuram (Mumbai - PIPING)

To: materials-welding@googlegroups.com

Sent: Tue, 28 Oct 2008 19:12:18 +0530 (IST)

Subject: [MW:1255] RE: 1253] RE: 1250] Re: HAZ

























Image:Pipe root weld with HAZ.jpg


Partial weld around a pipe joint with clear heat affected

zone. This is ASME SA106 Grade B steel pipe NPS 2.5 SCH 80 with J-grooved

prepared ends. An automated TIG orbital welder made half an orbit before

aborting. The heat affected zone is clearly visible because of the polished

ends, even though it is generally inoccuous in this material. (SA106 Grade B)

Photo by Yannick Trottier, 2006.




  
-----Original Message-----
From:

  materials-welding@googlegroups.com

  [mailto:materials-welding@googlegroups.com]On Behalf Of

  
CKPurohit
Sent: Tuesday, October 28, 2008 9:57 AM
To:

  materials-welding@googlegroups.com
Subject: [MW:1253] RE: 1250] Re:

  HAZ



  


  

Dear

  Shailesh,



  

 



  

As

  everybody informed that HAZ is largely depend on the process and other

  parameter is correct but my experience HAZ in manual welding is less than 3 mm

  and Auto (SAW and other high heat input process) it will be less than 5 mm for

  carbon steel and LAS. For SS I have not observed HAZ bigger than 1 mm (we can

  see after etching too).



  

 



  

I

  hope experienced people like Mr Kalayan can comment on statement as he might

  have seen many cross section HAZ after etching…..



  

 



  

Regards.



  

 



  

C.

  K. Purohit 



  

General

  Manager



  

QA

  / QC / WELDING / NDT / R&D



  

KNM

  Process Systems Sdn Bhd - Malaysia



  

 



  

HP

  - +6016 337 6448



  

 



  

 



  


  


  

From:

  materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]

  On Behalf Of Kalyan Elcalabs
Sent: Sel, 28 Okt 08 02:42

  pm
To: materials-welding@googlegroups.com
Subject:

  [MW:1250] Re: HAZ



  

 



  


  

Dear

  Shailesh,



  


  

 



  


  

There is no thumb

  rule for the formation of HAZ. This largely depends on welding procedure,

  equipment used, various consumables, electrical parameters,

  operators skill and the uncertainities contributed by them. Normally one

  should expect minimum HAZ as is it not a desirable phenomena in any welding

  process.



  


  

 



  


  

N.

  Kalyan.



  


  

ELCA

  Laboratories.



  


  

 



  


  

 



  


    


    

----- Original

    Message -----



    


    

From: shailesh dave

    



    

    


    

Sent: Monday, October

    27, 2008 6:53 PM



    


    

Subject: [MW:1247] Re:

    HAZ



    


    

 



    

      

      

        


          


          

DEAR SACHIN,



          


          

 



          


          

LET ME MAKE MY QUESTION CLEAR TO YOU. FROM WELD

          JOINT END HOW MUCH IS THE WIDTH OF HAZ.



          


          

 



          


          

REGARDS,



          


          

 



          


          

SHAILESH

--- On Mon, 10/27/08, sachin

          sankhe <sachin.sankhe@rediffmail.com>


          wrote:



          


            

From: sachin sankhe

            <sachin.sankhe@rediffmail.com>
Subject:

            [MW:1246] Re: HAZ
To: materials-welding@googlegroups.com
Date:

            Monday, October 27, 2008, 5:34 PM



            


            


            


Hi Shailesh
Your question is not

            clear

Regards
Sachin

On Sat, 25 Oct 2008 shailesh

            dave wrote :
>DEAR MEMBERS,
>
>WOULD YOU PLEASE

            TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING

            WELDING.
>
>REGARDS,
>
>S.N.DAVE
>I/C

            QA/QC DAS ISLAND UAE



    

 






CONFIDENTIALITY NOTICE


This e-mail and any attachments there to contain information, which is confidential, proprietary, privileged and/or protected from disclosure by intellectual property rights and are intended for the sole use of the recipient(s) named above. If you are not the intended recipient of this message you are hereby notified that any dissemination or copying of this message is strictly prohibited. If you have received this e-mail in error, please notify the sender either by telephone or by e-mail and delete it from any computer. Although this e-mail and any attachments thereto are believed to be free from any virus or other defects, which might affect any computer or IT system, it is the responsibility of the recipient to ensure that they are virus free. We are not liable for any loss or damage arising in any way from receipt or use there of. Thank you.




--
Hyundai to launch the i20 in India. Catch the exclusive preview on ZigWheels.com
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Wednesday, October 29, 2008

[MW:1256] Re: 1253] RE: 1250] Re: HAZ


Dear Sir,
 
In Api 650 ther is no where mention about permanent attachment of shell to horizontal and vertical weld distance or if its fouling in group I,II,III materials.
 
Please clarify
 
Regards
 
Sankar

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Tuesday, October 28, 2008

[MW:1255] RE: 1253] RE: 1250] Re: HAZ

Image:Pipe root weld with HAZ.jpg
Partial weld around a pipe joint with clear heat affected zone. This is ASME SA106 Grade B steel pipe NPS 2.5 SCH 80 with J-grooved prepared ends. An automated TIG orbital welder made half an orbit before aborting. The heat affected zone is clearly visible because of the polished ends, even though it is generally inoccuous in this material. (SA106 Grade B) Photo by Yannick Trottier, 2006.
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of CKPurohit
Sent: Tuesday, October 28, 2008 9:57 AM
To: materials-welding@googlegroups.com
Subject: [MW:1253] RE: 1250] Re: HAZ

Dear Shailesh,

 

As everybody informed that HAZ is largely depend on the process and other parameter is correct but my experience HAZ in manual welding is less than 3 mm and Auto (SAW and other high heat input process) it will be less than 5 mm for carbon steel and LAS. For SS I have not observed HAZ bigger than 1 mm (we can see after etching too).

 

I hope experienced people like Mr Kalayan can comment on statement as he might have seen many cross section HAZ after etching…..

 

Regards.

 

C. K. Purohit 

General Manager

QA / QC / WELDING / NDT / R&D

KNM Process Systems Sdn Bhd - Malaysia

 

HP - +6016 337 6448

 

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kalyan Elcalabs
Sent: Sel, 28 Okt 08 02:42 pm
To: materials-welding@googlegroups.com
Subject: [MW:1250] Re: HAZ

 

Dear Shailesh,

 

There is no thumb rule for the formation of HAZ. This largely depends on welding procedure, equipment used, various consumables, electrical parameters, operators skill and the uncertainities contributed by them. Normally one should expect minimum HAZ as is it not a desirable phenomena in any welding process.

 

N. Kalyan.

ELCA Laboratories.

 

 

----- Original Message -----

Sent: Monday, October 27, 2008 6:53 PM

Subject: [MW:1247] Re: HAZ

 

DEAR SACHIN,

 

LET ME MAKE MY QUESTION CLEAR TO YOU. FROM WELD JOINT END HOW MUCH IS THE WIDTH OF HAZ.

 

REGARDS,

 

SHAILESH

--- On Mon, 10/27/08, sachin sankhe <sachin.sankhe@rediffmail.com> wrote:

From: sachin sankhe <sachin.sankhe@rediffmail.com>
Subject: [MW:1246] Re: HAZ
To: materials-welding@googlegroups.com
Date: Monday, October 27, 2008, 5:34 PM


Hi Shailesh
Your question is not clear

Regards
Sachin

On Sat, 25 Oct 2008 shailesh dave wrote :
>DEAR MEMBERS,
>
>WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.
>
>REGARDS,
>
>S.N.DAVE
>I/C QA/QC DAS ISLAND UAE

 




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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.
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[MW:1254] Re: 1250] Re: HAZ

Dear Members,
 
Thanks for your feedback. I got the reply I wanted from you.
 
Regards,
 
Shailesh

--- On Tue, 10/28/08, CKPurohit <ck@knm-group.com> wrote:
From: CKPurohit <ck@knm-group.com>
Subject: [MW:1253] RE: 1250] Re: HAZ
To: materials-welding@googlegroups.com
Date: Tuesday, October 28, 2008, 2:27 PM

Dear Shailesh,

 

As everybody informed that HAZ is largely depend on the process and other parameter is correct but my experience HAZ in manual welding is less than 3 mm and Auto (SAW and other high heat input process) it will be less than 5 mm for carbon steel and LAS. For SS I have not observed HAZ bigger than 1 mm (we can see after etching too).

 

I hope experienced people like Mr Kalayan can comment on statement as he might have seen many cross section HAZ after etching…..

 

Regards.

 

C. K. Purohit 

General Manager

QA / QC / WELDING / NDT / R&D

KNM Process Systems Sdn Bhd - Malaysia

 

HP - +6016 337 6448

 

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kalyan Elcalabs
Sent: Sel, 28 Okt 08 02:42 pm
To: materials-welding@googlegroups.com
Subject: [MW:1250] Re: HAZ

 

Dear Shailesh,

 

There is no thumb rule for the formation of HAZ. This largely depends on welding procedure, equipment used, various consumables, electrical parameters, operators skill and the uncertainities contributed by them. Normally one should expect minimum HAZ as is it not a desirable phenomena in any welding process.

 

N. Kalyan.

ELCA Laboratories.

 

 

----- Original Message -----

Sent: Monday, October 27, 2008 6:53 PM

Subject: [MW:1247] Re: HAZ

 

DEAR SACHIN,

 

LET ME MAKE MY QUESTION CLEAR TO YOU. FROM WELD JOINT END HOW MUCH IS THE WIDTH OF HAZ.

 

REGARDS,

 

SHAILESH

--- On Mon, 10/27/08, sachin sankhe <sachin.sankhe@rediffmail.com> wrote:

From: sachin sankhe <sachin.sankhe@rediffmail.com>
Subject: [MW:1246] Re: HAZ
To: materials-welding@googlegroups.com
Date: Monday, October 27, 2008, 5:34 PM


Hi Shailesh
Your question is not clear

Regards
Sachin

On Sat, 25 Oct 2008 shailesh dave wrote :
>DEAR MEMBERS,
>
>WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.
>
>REGARDS,
>
>S.N.DAVE
>I/C QA/QC DAS ISLAND UAE
>
>
>
>>

 

ICL
<BR


 


***DISCLAIMER NOTICE ***
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If you are not the intended recipient, any review, retransmission, dissemination, distribution, printing, copying or use the information contained in this message or any part thereof in other manner is strictly prohibited.
If you receive this e-mail in error, please notify the sender immediately by return e-mail and delete the e-mail and any of its attachments.
Any personal views or opinions expressed by the sender shall be understood as neither given nor endorsed by KNM or any of the companies within the Group."


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For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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[MW:1253] RE: 1250] Re: HAZ

Dear Shailesh,

 

As everybody informed that HAZ is largely depend on the process and other parameter is correct but my experience HAZ in manual welding is less than 3 mm and Auto (SAW and other high heat input process) it will be less than 5 mm for carbon steel and LAS. For SS I have not observed HAZ bigger than 1 mm (we can see after etching too).

 

I hope experienced people like Mr Kalayan can comment on statement as he might have seen many cross section HAZ after etching…..

 

Regards.

 

C. K. Purohit 

General Manager

QA / QC / WELDING / NDT / R&D

KNM Process Systems Sdn Bhd - Malaysia

 

HP - +6016 337 6448

 

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kalyan Elcalabs
Sent: Sel, 28 Okt 08 02:42 pm
To: materials-welding@googlegroups.com
Subject: [MW:1250] Re: HAZ

 

Dear Shailesh,

 

There is no thumb rule for the formation of HAZ. This largely depends on welding procedure, equipment used, various consumables, electrical parameters, operators skill and the uncertainities contributed by them. Normally one should expect minimum HAZ as is it not a desirable phenomena in any welding process.

 

N. Kalyan.

ELCA Laboratories.

 

 

----- Original Message -----

Sent: Monday, October 27, 2008 6:53 PM

Subject: [MW:1247] Re: HAZ

 

DEAR SACHIN,

 

LET ME MAKE MY QUESTION CLEAR TO YOU. FROM WELD JOINT END HOW MUCH IS THE WIDTH OF HAZ.

 

REGARDS,

 

SHAILESH

--- On Mon, 10/27/08, sachin sankhe <sachin.sankhe@rediffmail.com> wrote:

From: sachin sankhe <sachin.sankhe@rediffmail.com>
Subject: [MW:1246] Re: HAZ
To: materials-welding@googlegroups.com
Date: Monday, October 27, 2008, 5:34 PM


Hi Shailesh
Your question is not clear

Regards
Sachin

On Sat, 25 Oct 2008 shailesh dave wrote :
>DEAR MEMBERS,
>
>WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.
>
>REGARDS,
>
>S.N.DAVE
>I/C QA/QC DAS ISLAND UAE
>
>
>
>>

 

ICL
<BR


 


***DISCLAIMER NOTICE ***
"This e-mail and any files transmitted with it is confidential and is intended only for the use of the recepient(s) named above.
If you are not the intended recipient, any review, retransmission, dissemination, distribution, printing, copying or use the information contained in this message or any part thereof in other manner is strictly prohibited.
If you receive this e-mail in error, please notify the sender immediately by return e-mail and delete the e-mail and any of its attachments.
Any personal views or opinions expressed by the sender shall be understood as neither given nor endorsed by KNM or any of the companies within the Group."

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For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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[MW:1252] Re: Which WPS can be used

what is the chemical analysis & thickness of stress relief base metal?



From: "kataiah@bilfal.com" <kataiah@bilfal.com>
To: materials-welding@googlegroups.com
Sent: Sunday, October 26, 2008 12:08:27 PM
Subject: [MW:1240] Which WPS can be used


Dear Frinds ,

I have a requirement to weld  Stress relievedCS  plate # normal CS Plate.

Which WPS can is use to weld such combination ( i mean a WPS with PWHT or with out PWHT).

ASME is refering anywhere which type to be used?

What is the logic to use perticular type?.

Regards

P.K.
Bilfal Industries.

 



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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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[MW:1251] Re: HAZ

hi
if you look for for a thumb rule about haz that it is used in each situation ,it not exist.
but i prefer some following below,considered:
chemical analysis of parent metal(carbon equivalent)
thickness of parent
H.I & preheat depends on process
joint design
if you express a special case,i can help more detail
bye


From: shailesh dave <snd2988@yahoo.com>
To: materials-welding@googlegroups.com
Sent: Saturday, October 25, 2008 12:44:10 PM
Subject: [MW:1244] HAZ

DEAR MEMBERS,
 
WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.
 
REGARDS,
 
S.N.DAVE
I/C QA/QC DAS ISLAND UAE





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[MW:1250] Re: HAZ

Dear Shailesh,
 
There is no thumb rule for the formation of HAZ. This largely depends on welding procedure, equipment used, various consumables, electrical parameters, operators skill and the uncertainities contributed by them. Normally one should expect minimum HAZ as is it not a desirable phenomena in any welding process.
 
N. Kalyan.
ELCA Laboratories.
 
 
----- Original Message -----
Sent: Monday, October 27, 2008 6:53 PM
Subject: [MW:1247] Re: HAZ

DEAR SACHIN,
 
LET ME MAKE MY QUESTION CLEAR TO YOU. FROM WELD JOINT END HOW MUCH IS THE WIDTH OF HAZ.
 
REGARDS,
 
SHAILESH

--- On Mon, 10/27/08, sachin sankhe <sachin.sankhe@rediffmail.com> wrote:
From: sachin sankhe <sachin.sankhe@rediffmail.com>
Subject: [MW:1246] Re: HAZ
To: materials-welding@googlegroups.com
Date: Monday, October 27, 2008, 5:34 PM


Hi Shailesh
Your question is not clear

Regards
Sachin

On Sat, 25 Oct 2008 shailesh dave wrote :
>DEAR MEMBERS,
>
>WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.
>
>REGARDS,
>
>S.N.DAVE
>I/C QA/QC DAS ISLAND UAE
>
>
>
>>



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Monday, October 27, 2008

[MW:1248] RE: 1244] HAZ

Dear sir
I beg to inform you to doing welding without deflection during high
temperature welding operation you can use from warm sand and cooling process
must be doing slow and controlled

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of shailesh dave
Sent: Saturday, October 25, 2008 12:44 PM
To: materials-welding@googlegroups.com
Subject: [MW:1244] HAZ

DEAR MEMBERS,

WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE
DURING WELDING.

REGARDS,

S.N.DAVE
I/C QA/QC DAS ISLAND UAE


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[MW:1247] Re: HAZ

ICL
DEAR SACHIN,
 
LET ME MAKE MY QUESTION CLEAR TO YOU. FROM WELD JOINT END HOW MUCH IS THE WIDTH OF HAZ.
 
REGARDS,
 
SHAILESH

--- On Mon, 10/27/08, sachin sankhe <sachin.sankhe@rediffmail.com> wrote:
From: sachin sankhe <sachin.sankhe@rediffmail.com>
Subject: [MW:1246] Re: HAZ
To: materials-welding@googlegroups.com
Date: Monday, October 27, 2008, 5:34 PM

 
Hi Shailesh
Your question is not clear

Regards
Sachin

On Sat, 25 Oct 2008 shailesh dave wrote :
>DEAR MEMBERS,
>
>WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.
>
>REGARDS,
>
>S.N.DAVE
>I/C QA/QC DAS ISLAND UAE
>
>
>
>>




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[MW:1249] Fw: [MW:1246] Re: HAZ


Dear Sachin,

I think he requires information reqarding How HAZ will be formed during welding, What will be its crystal stractures compared to base material & weld metal, Its properties like tensile, hardness, impact campared to B/M & weld metal etc.

In total he requires welding metallurgy of welds.

regards
P.K
----- Forwarded by Kataiah/BelleliSA on 27/10/2008 04:12 Ù… -----
ICL
"sachin sankhe" <sachin.sankhe@rediffmail.com>
Sent by: materials-welding@googlegroups.com

27/10/2008 03:04 Ù…
Please respond to materials-welding

       
        To:        <materials-welding@googlegroups.com>
        cc:        
        Subject:        [MW:1246] Re: HAZ



 
Hi Shailesh
Your question is not clear

Regards
Sachin

On Sat, 25 Oct 2008 shailesh dave wrote :
>DEAR MEMBERS,
>
>WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.
>
>REGARDS,
>
>S.N.DAVE
>I/C QA/QC DAS ISLAND UAE
>
>
>
>>




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[MW:1246] Re: HAZ

 
Hi Shailesh
Your question is not clear

Regards
Sachin

On Sat, 25 Oct 2008 shailesh dave wrote :
>DEAR MEMBERS,
>
>WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.
>
>REGARDS,
>
>S.N.DAVE
>I/C QA/QC DAS ISLAND UAE
>
>
>
>>



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[MW:1245] Re: Which WPS can be used

 If your production weld is undergoing PWHT than u have to use with PWHT WPS otherwise without PWHT. Base material Heat treatment condition before welding is not essential & also with base metal heat treatment condition u cannot decide WPS - PWHT requirement.

On Sun, Oct 26, 2008 at 12:38 PM, <kataiah@bilfal.com> wrote:

Dear Frinds ,

I have a requirement to weld  Stress relievedCS  plate # normal CS Plate.

Which WPS can is use to weld such combination ( i mean a WPS with PWHT or with out PWHT).

ASME is refering anywhere which type to be used?

What is the logic to use perticular type?.

Regards

P.K.
Bilfal Industries.

 


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[MW:1243] Re: 1240] Which WPS can be used

Use WPS w/o PWHT!
-----Original Message-----
From: kataiah@bilfal.com [mailto:kataiah@bilfal.com]
Sent: Monday, October 27, 2008 9:07 AM
To: Bathula Raghuram (Mumbai - PIPING)
Subject: Fw: [MW:1242] RE: 1240] Which WPS can be used


Dear Sir,

Iam not going to do PWHT  after welding.

reards

----- Forwarded by Kataiah/BelleliSA on 27/10/2008 11:05 ص -----
ICL
"Bathula Raghuram \(Mumbai - PIPING\)" <R.Bathula@ticb.com>
Sent by: materials-welding@googlegroups.com

27/10/2008 10:47 ص
Please respond to materials-welding

       
        To:        <materials-welding@googlegroups.com>
        cc:        
        Subject:        [MW:1242] RE: 1240] Which WPS can be used



it depends on after treatment of this weld, is this weld required or subjected to PWHT?
-----Original Message-----
From:
materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of kataiah@bilfal.com
Sent:
Sunday, October 26, 2008 9:38 AM
To:
materials-welding@googlegroups.com
Subject:
[MW:1240] Which WPS can be used


Dear Frinds ,


I have a requirement to weld  Stress relievedCS  plate # normal CS Plate.


Which WPS can is use to weld such combination ( i mean a WPS with PWHT or with out PWHT).


ASME is refering anywhere which type to be used?


What is the logic to use perticular type?.


Regards


P.K.

Bilfal Industries.
 



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[MW:1242] RE: 1240] Which WPS can be used

it depends on after treatment of this weld, is this weld required or subjected to PWHT?
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of kataiah@bilfal.com
Sent: Sunday, October 26, 2008 9:38 AM
To: materials-welding@googlegroups.com
Subject: [MW:1240] Which WPS can be used


Dear Frinds ,

I have a requirement to weld  Stress relievedCS  plate # normal CS Plate.

Which WPS can is use to weld such combination ( i mean a WPS with PWHT or with out PWHT).

ASME is refering anywhere which type to be used?

What is the logic to use perticular type?.

Regards

P.K.
Bilfal Industries.

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Sunday, October 26, 2008

[MW:1240] Which WPS can be used


Dear Frinds ,

I have a requirement to weld  Stress relievedCS  plate # normal CS Plate.

Which WPS can is use to weld such combination ( i mean a WPS with PWHT or with out PWHT).

ASME is refering anywhere which type to be used?

What is the logic to use perticular type?.

Regards

P.K.
Bilfal Industries.

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Saturday, October 25, 2008

[MW:1241] Siloxrine paint coating

 

Dear friends,

 

Have you ever heard about Siloxrine paint coating? (Waste water brine service).

 

Members please share your views regarding the application of above painting system.

 

Regards,

 

S.Mathusoothanan

  


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[MW:1244] HAZ

CONFIDENTIALITY NOTICE
This e-mail and any attachments there to contain information, which is confidential, proprietary, privileged and/or protected from disclosure by intellectual property rights and are intended for the sole use of the recipient(s) named above. If you are not the intended recipient of this message you are hereby notified that any dissemination or copying of this message is strictly prohibited. If you have received this e-mail in error, please notify the sender either by telephone or by e-mail and delete it from any computer. Although this e-mail and any attachments thereto are believed to be free from any virus or other defects, which might affect any computer or IT system, it is the responsibility of the recipient to ensure that they are virus free. We are not liable for any loss or damage arising in any way from receipt or use there of. Thank you.
DEAR MEMBERS,
 
WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.
 
REGARDS,
 
S.N.DAVE
I/C QA/QC DAS ISLAND UAE


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Friday, October 24, 2008

[MW:1239] Hydro test-max holding period


The RP1110 which is for liquid petroleum pipelines refers back to B31.4 and 49 Code of federal regulations part 195.



"Bathula Raghuram \(Mumbai - PIPING\)" <R.Bathula@ticb.com>
Sent by: materials-welding@googlegroups.com

24/10/2008 09:47

Please respond to
materials-welding@googlegroups.com

To
<materials-welding@googlegroups.com>
cc
Subject
[MW:1237] RE: 1236] Hydro test-max holding period







Stress value at test temperature shall be considered while prolonged period with varying temperatures.
some time we do big systems like fire water network (or other buried piping) to be kept at design pressure for 24 hours, where pressure/temperature monitored with continuous P/T recorders.
B31.3 is has no such requirement, but in case of EN13480 it is held for 30min minimum at test pressure and bring back to design pressure for close visual inspection.
However Pipelines (designed to ASME B31.4/31.8 etc.) may require longer periods
for e.g. B31.4 indicates Hydro @ 1.25 time internal DP but not less than 4 hours
you may also note the caution given in B31.4
"When lines are tested at pressures that develop a hoop stress, based on nominal wall thickness, in excess of 90% of the specified minimum yield strength of the pipe, special care shall be used to prevent overstrain of the pipe."

Probably API RP 1110 may give you some guidance. I have not seen this.

Members please share your views.

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com]On Behalf Of Aarpee
Sent: Friday, October 24, 2008 8:30 AM
To: Materials & Welding
Subject: [MW:1236] Hydro test-max holding period

As per B31.3 Hydro test is carried out at 1.5X Design Pressure.Holding
time for Piping spools is normally 30 minutes but at times 4-6 hours
for Gas applications.Can this be held for 24 hours?What is the
potential risk?It is normally indicated that after Hydro inspection
for 10-30 minutes at 1.5X Design Pressure,if you intend doing further
inspection then same can be done at a pressure not more than the
design pressure.Opinion of the group is being sought thro this mail
Regards
Aarpee




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[MW:1238] Hydro test-max holding period


The holding period depends on the time needed for inspecting the system thoroughly. Minimum is 10 minutes. Especially the gas tests calls for 100% weld and mechanical joints being examined.
Also we have to ensure the limits of test pressure defined by individual components also to be taken care not to damage the components for eg. the soft seating or lining or to replace them with pipe spools.

To my info the repeated call for Hydrostatic test on the same system, the pressure need not be changed from the code to its design pressure as most of the case if any major leaks are identified, the test is performed again at the same pressure and not to reduced pressure. It is independent of the holding time. Holding time risk are purely defined by inspecting time and the in-line components and not of the piping components. It is a usual practice to remove all in-line components which has reduced testing pressure conditions.

The maximum test pressure is the pressure at which the pipe reaches its yield stress. In most of the cases the problems can be tracked back to the original thickness calc of the piping system where in somecases you may find the thickness not sufficient to take the test pressures but will suit the design pressure. When you design the piping class for rating condition you may have some margins to accommodate the test pressure but not always especially in the larger size range above 24". This makes the site testing team to reduce the test pressure adjusting to actual pipes purchased and being used and of the elevation impact of the system. Also piping connected with vessels pose a diff. situation and defining the test pressures requires a different judgement as the approach differs from company to company.

Most important thing is to question the need of hydrotest for a system to process dept. who defines the requirement.

Regards,
Kannan.



Aarpee <ramprasad.chari@gmail.com>
Sent by: materials-welding@googlegroups.com

24/10/2008 08:29

Please respond to
materials-welding@googlegroups.com

To
"Materials & Welding" <materials-welding@googlegroups.com>
cc
Subject
[MW:1236] Hydro test-max holding period






As per B31.3 Hydro test is carried out at 1.5X Design Pressure.Holding
time for Piping spools is normally 30 minutes but at times 4-6 hours
for Gas applications.Can this be held for 24 hours?What is the
potential risk?It is normally indicated that after Hydro inspection
for 10-30 minutes at 1.5X Design Pressure,if you intend doing further
inspection then same can be done at a pressure not more than the
design pressure.Opinion of the group is being sought thro this mail
Regards
Aarpee

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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...