Re: [MW:10897] Paint repair procedure

It is case by case, depend on gasket type, because the roughness of contact gasket surface will be smooth.
Check also client requirement for gasket contact surface.
Anyway, better you ask to paint maker how to clean such type of paint.

Thank you
Sent from my Hape Buluk®
powered by Sinyal Lieur INDOSAT

-----Original Message-----
From: Adi <adinraos@gmail.com>
Sender: materials-welding@googlegroups.com
Date: Sat, 30 Apr 2011 05:27:07
To: Materials & Welding<materials-welding@googlegroups.com>
Reply-To: materials-welding@googlegroups.com
Subject: [MW:10894] Paint repair procedure

Hi all....

Mistakenly flange serration area painted,
Is anybody having repair procedure for this? It is acceptable to
remove painted flange serration area by wire brush.

Adi

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[MW:10896] any acceptance standards availabe for structural steel? for fitup?

Dear all,

pl tell us..
Any acceptance standards for fitup & fabrication of structural steel..
Like welding codes AWS D1.1, ASME 9.
My client is not specified any codes..
& let me know any codes availabe for fitups like..
Type of joints & how much joints permitable in 6 meter..
type of inserts permitable..
Misalignment permitable..

Thanks & regards
m

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RE: [MW:10895] Comparison of Large Dia Flanges (B16.47 series A & B) in Refinery services

Dear Krishnakumar,
 
I addition to below valuable information here are some more important points to consider.
 
1) For process piping ( services you mentioned) normally Series A flanges been used. Series A flanges are heiver in weight with more no of bolts and in continuation of ASME B16.5.
2) For CWS you can use series B flanges since they are compact and light weight and hence more economical.
3) For the compatibility purpose you need to check existing flanges series.
 
 
Please do not mix series A flanges with Series B flanges, otherwise it will be a big mess. Hope the above information will be helpfull for you.
 
Regards.
 
Hafiz Ali Alvi
 

---

Date: Fri, 29 Apr 2011 17:54:38 -0700
From: poojvin@yahoo.com
Subject: Re: [MW:10888] Comparison of Large Dia Flanges (B16.47 series A & B) in Refinery services
To: materials-welding@googlegroups.com

Dear Mr Krishnakumar,   To standardize the pipe flanges for sizes NPS 26 to NPS 60 for class 75 through to Class 1500 ASME B 16.47 was developed . At that time it was decided to include the flange dimensions as per MSS SP 44 flanges except Class 75 which are ASME/API 605 flanges. Since the dimension of these two classes of flanges were not compatible with each other it was decided that  MSS SP 44 flanges are B 16.47 Series A flanges and  API 605 flanges are designated as B 16.47 Series B flanges.   Standards followed: ASME B 16.5 : UP TO SIZE NPS 24 ASME B16.47 SR.A / SR.B : UP TO SIZE NPS 60 (for rating150& 300) AWWA C-207 : UP TO SIZE NPS 144 (without Hub) & UP TO SIZE NPS 96 (With Hub) - Pls. refer this standard while giving reference of this for any size. Other member may offer their comment,    Vinod --- On Fri, 4/29/11, Krishnakumar M S <krishnakumarms01@yahoo.com> wrote: From: Krishnakumar M S <krishnakumarms01@yahoo.com> Subject: [MW:10880] Comparison of Large Dia Flanges (B16.47 series A & B) in Refinery services To: materials-welding@googlegroups.com Date: Friday, April 29, 2011, 10:46 AM Hi, I have to use 30", 42", 48" pipes in Cude Oil, Naphtha, HSD and CRWS services. What is the criteria between the series A & B for ASME B16.47. Regarding no. of bolts, enonomy, availability etc. If anyone to know this please. Regards Krishnakumar Fact Engineering & Design Organisation (FEDO) Cochin, India -- 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.

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[MW:10894] Paint repair procedure

Hi all....

Mistakenly flange serration area painted,
Is anybody having repair procedure for this? It is acceptable to
remove painted flange serration area by wire brush.

Adi

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[MW:10893] QW-404.6 of sec IX

Dear experts,                  I have checked all the tables in sec IX; no where mentioned QW-406.6 as essential variable or essential variable.           But in page 69 in sec IX it states that A change in nominal size of electrode or diameter specified in the WPS. I couldn't understand this statement. Can somebody explain me please?   Regards Ilangkumaran

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[MW:10892] Diameter of electrode-reg

Dear Experts,                  While my routine inspection of welding I have noticed Diameter of the electrode used for the capping was not as per the qualified WPS and I was told the diameter of the electrode is not an essential variables.     WPS for SMAW   Now as per the sec IX; Table QW-253   1) the essential variable QW-404.30   2) Supplementary variables QW-404.7/.12   3)  Non essential varaiable QW-404.6          & as per the QW-353   1) QW-404.15/.30 were the essential variables for welder qualification.   So if the diameter of electrode used in production welds beyond 6mm then only the WPS needs to be re written? or Should we insist the welder to use what ever mentioned in the qualified WPS? or the welder should use the electrode that he used while performing his WQT. Can somebody expain me in details how to deal this?   Regards Ilangkumaran

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[MW:10891] impact test

Dear expert,

  we manufaturing two tank for oil storage as per API 650 ,that design temp is 87C and 174C respectively.Here any essiential for charpy impact test?if need please mention temperature.

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Re: [MW:10890] Duplex Claded Eqipt PWHT

No PWHT for duplex clad as temp between 300 to 850 degC will form intermetallic phases and affect the corrosion properties. suggest  u carry out PWHT of equipment  with barrier layer of 309L Mo  and then deopsit duplex over barrier layer.

regards

vanchi

On Fri, Apr 29, 2011 at 10:01 AM, Prakash Hegde <pb.hegde@yahoo.com> wrote:

Dear Friends

I have a query about The Duplex  cladded E quipment having base material SA 516 Gr70 of 50mm thk and clad of Duplex (3mm )

The eqipment require to undergo PWHT at 600C The Joint is clad restored by Duplex weld

 

i) Does the PWHT at 600C will affect  the Corrosion properties of Duplex weld (Corrosion test like IGC,Pitting corrosin,etc  as per GS8)

ii) If yes do we require to carry out PWHt at lower Temp.

 

Regards

Hegde P.B.

08805593046

 

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Re: [MW:10889] Duplex Claded Eqipt PWHT

Dear Mr.Hegde,   You have not specified composition of overlay -22 Cr or 25 Cr. The DSS overlay and subsequent PWHt at 600 Deg.C is not advisable primarily for Alfa Prima microstructure which is likely to form in this temp. range. Corrosion tests ( G 48) and Hardness test may reveal this.However it is difficult to take out sample for G 48 test with 3 mm overlay on CS.   Probable solutions-   1) Incolloy 625 overlay instead of DSS. 2) Carryout PWHT after completion of overlay after first pass and overlaying other passes after PWHT. 3) Carryout SSC/SCC test with Simulation heta treatment for the process conditions as stated in NACE.   Regards,   Manish Kulkarni --- On Fri, 29/4/11, Prakash Hegde <pb.hegde@yahoo.com> wrote: From: Prakash Hegde <pb.hegde@yahoo.com> Subject: [MW:10879] Duplex Claded Eqipt PWHT To: materials-welding@googlegroups.com Date: Friday, 29 April, 2011, 10:01 AM Dear Friends I have a query about The Duplex  cladded E quipment having base material SA 516 Gr70 of 50mm thk and clad of Duplex (3mm ) The eqipment require to undergo PWHT at 600C The Joint is clad restored by Duplex weld   i) Does the PWHT at 600C will affect  the Corrosion properties of Duplex weld (Corrosion test like IGC,Pitting corrosin,etc  as per GS8) ii) If yes do we require to carry out PWHt at lower Temp.   Regards Hegde P.B. 08805593046   -- 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.

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Re: [MW:10888] Comparison of Large Dia Flanges (B16.47 series A & B) in Refinery services

Dear Mr Krishnakumar,   To standardize the pipe flanges for sizes NPS 26 to NPS 60 for class 75 through to Class 1500 ASME B 16.47 was developed . At that time it was decided to include the flange dimensions as per MSS SP 44 flanges except Class 75 which are ASME/API 605 flanges. Since the dimension of these two classes of flanges were not compatible with each other it was decided that  MSS SP 44 flanges are B 16.47 Series A flanges and  API 605 flanges are designated as B 16.47 Series B flanges.   Standards followed: ASME B 16.5 : UP TO SIZE NPS 24 ASME B16.47 SR.A / SR.B : UP TO SIZE NPS 60 (for rating150& 300) AWWA C-207 : UP TO SIZE NPS 144 (without Hub) & UP TO SIZE NPS 96 (With Hub) - Pls. refer this standard while giving reference of this for any size. Other member may offer their comment,   Vinod --- On Fri, 4/29/11, Krishnakumar M S <krishnakumarms01@yahoo.com> wrote: From: Krishnakumar M S <krishnakumarms01@yahoo.com> Subject: [MW:10880] Comparison of Large Dia Flanges (B16.47 series A & B) in Refinery services To: materials-welding@googlegroups.com Date: Friday, April 29, 2011, 10:46 AM Hi, I have to use 30", 42", 48" pipes in Cude Oil, Naphtha, HSD and CRWS services. What is the criteria between the series A & B for ASME B16.47. Regarding no. of bolts, enonomy, availability etc. If anyone to know this please. Regards Krishnakumar Fact Engineering & Design Organisation (FEDO) Cochin, India -- 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.

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Re: [MW:10886] RE: 10879] Duplex Claded Eqipt PWHT

I have one more point to add after cladding, sometime you may find cracks . But these cracks usually do not extend upto the base material and usuallydo not propogate during service. Therefore there usually is no need for PWHT. With regards Arijoy Roy R&D Telcon , India. --- On Fri, 29/4/11, Pieper QSI <pieper-qsi@kpnmail.nl> wrote: From: Pieper QSI <pieper-qsi@kpnmail.nl> Subject: [MW:10883] RE: 10879] Duplex Claded Eqipt PWHT To: materials-welding@googlegroups.com Date: Friday, 29 April, 2011, 12:51 PM Dear Mr. Hedge,   When executing PWHT at 600 °C your corrosion resistance will be reduced because of the formation of Sigma phase (FeCr precipitates) in the microstructure of the cladding. Sigma phase can occur in the temperature range from 450 °C – 850 °C so if you will discuss lowering the PWHT temperature you should go for 400 max. but I would choose to propose withholding PWHT and take care of controlling welding parameters during production. You may propose executing portable MicroVickers hardness tests after weld completion in order to demonstrate no high hardness values are present at the HAZ near weld surface. Most important is to convince your client to withhold PWHT because of the corrosion resistance of the cladding. When client insist on any kind of stress relieve treatment you perhaps can convince them to use high frequency hammering of the cap layer and HAZ. This will introduce compressive stresses in the surface up to 2 mm instead of the tensile stresses present after welding.   Met vriendelijke groeten / Best Regards   Herman Pieper   Pieper Quality Support & Inspection Phone: +31 (0)521 380083 Fax:     +31 (0)84 7539225 Cell:     +31 (0)6 51691215 www.pieper-qsi.nl   Van: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] Namens Prakash Hegde Verzonden: vrijdag 29 april 2011 6:31 Aan: materials-welding@googlegroups.com Onderwerp: [MW:10879] Duplex Claded Eqipt PWHT   Dear Friends I have a query about The Duplex  cladded E quipment having base material SA 516 Gr70 of 50mm thk and clad of Duplex (3mm ) The eqipment require to undergo PWHT at 600C The Joint is clad restored by Duplex weld   i) Does the PWHT at 600C will affect  the Corrosion properties of Duplex weld (Corrosion test like IGC,Pitting corrosin,etc  as per GS8) ii) If yes do we require to carry out PWHt at lower Temp.   Regards Hegde P.B. 08805593046   -- 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.

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Re: [MW:10886] Inconel 625 overlay on AISI4140

Dear Venu,

The maximum allowable hardness at any location on welded surfaces, after final machining shall be less than 35 HRC for Ni-Cr-MO-Co (Inconel 625).

Please confirm with vendor regarding PWHT but usually required with this alloy, assuming Weld qualification in accordance with ASME Sec ix, following are the aspects to be considered while reviewing WPS/PQR:-

-No limit on max. deposit thickness qualified- No worries in your case
-Base metal thickness range (1" to unlimited)- No worries in your case
-for processe depositing a weld bead width greater than 1/2 in. wide, the weld overlay shall consist of a minimum of three weld beads in the first layer.
-When a chemical composition is specified in the WPS, chemical analysis specimens shall be removed at locations specified in QW-462.5(b) or QW-462.5(e). The chemical analysis shall be performed in accordance with QW-462.5(a) and shall be within the range specified in the WPS. This chemical analysis is not required when a chemical composition is not specified on the WPS.
-A change in the UNS number for each AWS classification.
-Position and Diameter is supplementary essential variable.
-Liquid Penetrant testing (colour contrast)- Surface Indications (1.6 mm) maximum rounded or linear).
-5X visual examination of cross sectional macro: (0.8 mm) max length of linear or rounded indication).
-Chemical Composition (Weld overlay cladding shall conform to ASTM B424 UNS N08825.

Should you have further query, feel free to post again.

Regards
Manpreet Singh

>From: venu moturu [mailto:moturuvenu@yahoo.com]
>Sent: Sunday, April 24, 2011 10:57 AM
>To: materials-welding@googlegroups.com
>Cc: Bathula Raghuram (Mumbai - PIPING)
>Subject: Inconel 625 overlay on AISI4140
>
>Dear Friends,
>
>Could anyone pl. advice or guide usas we wanted to weld corrosion resistant overlay of Inconel 625 onAISI 4140 on a used sub sea equipment in the oil and gas sector , wherein the application demands severe Tensile and cyclic loads on thecomponent . The overlay shall be of approximately 4~5mm on a 100 mm thicksection .
>
>The vendor has submitted us two procedureswith pulsed GMAW (Auto ) welding process having with and without PWHT. When we referred the procedure with PWHT we found that theprocedure is qualified (at 540 degreeC @ soaking time 2hrs and rateof heating 150 degree C/Hr)
>
>can anyone help me out to send the literaturewith and without PWHT
>
>Best regards
>venu
>
>
>
>
>
>
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[MW:10885] Re : IQI for Radiography Testing

 

Dear : All,

 

IQI in Duplex Steel type  must be applied  to perform the  Radiography Testing  for Duplex Steels  ,

Did you had any references  from  ASME CODE to Refuse the application.

 

Please advise......

 

 

Regards

Mus

 

 

Re: [MW:10884] RE: 10879] Duplex Claded Eqipt PWHT

Dear Mr Herman Pieper

Thanks for Suggestion

My openion ,which can be debated

i) If I carry out restoration of cladding by barrier layer of ry 309LMo chemistry  and carry out PWHT as per code

ii)After PWHT go for rest of the layer by Duplex electrode and no further PWHT

(Of course PQR is to be qualified accordingly)

What is your openion ?

Regards

Hegde P.B.

---

From: Pieper QSI <pieper-qsi@kpnmail.nl>
To: materials-welding@googlegroups.com
Sent: Fri, 29 April, 2011 12:51:54 PM
Subject: [MW:10883] RE: 10879] Duplex Claded Eqipt PWHT

Dear Mr. Hedge,

 

When executing PWHT at 600 °C your corrosion resistance will be reduced because of the formation of Sigma phase (FeCr precipitates) in the microstructure of the cladding. Sigma phase can occur in the temperature range from 450 °C – 850 °C so if you will discuss lowering the PWHT temperature you should go for 400 max. but I would choose to propose withholding PWHT and take care of controlling welding parameters during production.

You may propose executing portable MicroVickers hardness tests after weld completion in order to demonstrate no high hardness values are present at the HAZ near weld surface.

Most important is to convince your client to withhold PWHT because of the corrosion resistance of the cladding. When client insist on any kind of stress relieve treatment you perhaps can convince them to use high frequency hammering of the cap layer and HAZ. This will introduce compressive stresses in the surface up to 2 mm instead of the tensile stresses present after welding.

 

Met vriendelijke groeten / Best Regards

 

Herman Pieper

 

Pieper Quality Support & Inspection

Phone: +31 (0)521 380083

Fax:     +31 (0)84 7539225

Cell:     +31 (0)6 51691215

www.pieper-qsi.nl

 

Van: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] Namens Prakash Hegde
Verzonden: vrijdag 29 april 2011 6:31
Aan: materials-welding@googlegroups.com
Onderwerp: [MW:10879] Duplex Claded Eqipt PWHT

 

Dear Friends

I have a query about The Duplex  cladded E quipment having base material SA 516 Gr70 of 50mm thk and clad of Duplex (3mm )

The eqipment require to undergo PWHT at 600C The Joint is clad restored by Duplex weld

 

i) Does the PWHT at 600C will affect  the Corrosion properties of Duplex weld (Corrosion test like IGC,Pitting corrosin,etc  as per GS8)

ii) If yes do we require to carry out PWHt at lower Temp.

 

Regards

Hegde P.B.

08805593046

 

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[MW:10883] RE: 10879] Duplex Claded Eqipt PWHT

Dear Mr. Hedge,

 

When executing PWHT at 600 °C your corrosion resistance will be reduced because of the formation of Sigma phase (FeCr precipitates) in the microstructure of the cladding. Sigma phase can occur in the temperature range from 450 °C – 850 °C so if you will discuss lowering the PWHT temperature you should go for 400 max. but I would choose to propose withholding PWHT and take care of controlling welding parameters during production.

You may propose executing portable MicroVickers hardness tests after weld completion in order to demonstrate no high hardness values are present at the HAZ near weld surface.

Most important is to convince your client to withhold PWHT because of the corrosion resistance of the cladding. When client insist on any kind of stress relieve treatment you perhaps can convince them to use high frequency hammering of the cap layer and HAZ. This will introduce compressive stresses in the surface up to 2 mm instead of the tensile stresses present after welding.

 

Met vriendelijke groeten / Best Regards

 

Herman Pieper

 

Pieper Quality Support & Inspection

Phone: +31 (0)521 380083

Fax:     +31 (0)84 7539225

Cell:     +31 (0)6 51691215

www.pieper-qsi.nl

 

Van: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] Namens Prakash Hegde
Verzonden: vrijdag 29 april 2011 6:31
Aan: materials-welding@googlegroups.com
Onderwerp: [MW:10879] Duplex Claded Eqipt PWHT

 

Dear Friends

I have a query about The Duplex  cladded E quipment having base material SA 516 Gr70 of 50mm thk and clad of Duplex (3mm )

The eqipment require to undergo PWHT at 600C The Joint is clad restored by Duplex weld

 

i) Does the PWHT at 600C will affect  the Corrosion properties of Duplex weld (Corrosion test like IGC,Pitting corrosin,etc  as per GS8)

ii) If yes do we require to carry out PWHt at lower Temp.

 

Regards

Hegde P.B.

08805593046

 

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RE: [MW:10882] acceptance standards for pittings for SA 516 GR 70 Plates

I believe the depth of the pitting should not exceed 10% of the nominal wall thickness viz the manufacturing tolerance.

 

Best Wishes

Aftab Ahmad

 

---

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of sunil javed
Sent: Friday, April 29, 2011 11:10 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:10881] acceptance standards for pittings for SA 516 GR 70 Plates

 

There is a tolerance for the thickness for the recied materials in Sec VIII div 1, I think that is 20% of PO thickness. Please verify, I donlt have the code with me now to specify the paragraph.

 

I think, we can accept the plate if the remaining thickness after removing the pitting area, by gtinding and actual thickness check, is meeting the design thickness including CA, we shall not remove the CA from the acailable thickness as this is the new project material. we shall not go upto the CA (normally this will be 2 to 3 mm).

 

Javed

On Mon, Apr 25, 2011 at 3:06 PM, asad azmi <azmiasadayub@gmail.com> wrote:

Dear All,

 

Greetings.

 

what is the acceptance standard for pittings on SA 516 GR 70 Plate.

 

I mean what is the depth and diameter allowed.

 

Thanks and Regards

 

Asad Azmi

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Re: [MW:10881] acceptance standards for pittings for SA 516 GR 70 Plates

There is a tolerance for the thickness for the recied materials in Sec VIII div 1, I think that is 20% of PO thickness. Please verify, I donlt have the code with me now to specify the paragraph.

 

I think, we can accept the plate if the remaining thickness after removing the pitting area, by gtinding and actual thickness check, is meeting the design thickness including CA, we shall not remove the CA from the acailable thickness as this is the new project material. we shall not go upto the CA (normally this will be 2 to 3 mm).

 

Javed

On Mon, Apr 25, 2011 at 3:06 PM, asad azmi <azmiasadayub@gmail.com> wrote:

Dear All,

 

Greetings.

 

what is the acceptance standard for pittings on SA 516 GR 70 Plate.

 

I mean what is the depth and diameter allowed.

 

Thanks and Regards

 

Asad Azmi

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[MW:10880] Comparison of Large Dia Flanges (B16.47 series A & B) in Refinery services

Hi,

I have to use 30", 42", 48" pipes in Cude Oil, Naphtha, HSD and CRWS services.
What is the criteria between the series A & B for ASME B16.47. Regarding no. of bolts, enonomy, availability etc.
If anyone to know this please.

Regards

Krishnakumar
Fact Engineering & Design Organisation (FEDO)
Cochin, India

[MW:10879] Duplex Claded Eqipt PWHT

Dear Friends

I have a query about The Duplex  cladded E quipment having base material SA 516 Gr70 of 50mm thk and clad of Duplex (3mm )

The eqipment require to undergo PWHT at 600C The Joint is clad restored by Duplex weld

 

i) Does the PWHT at 600C will affect  the Corrosion properties of Duplex weld (Corrosion test like IGC,Pitting corrosin,etc  as per GS8)

ii) If yes do we require to carry out PWHt at lower Temp.

 

Regards

Hegde P.B.

08805593046

 

[MW:10878] Re: Normalizing of Clad Dish Ends

hi

On Apr 7, 10:19 am, JASPAL SINGH <jaspaldh...@gmail.com> wrote:
> Dear Members,
>
> This is with reference to Normalizing requirement clad dish ends above
> 16mm Thickness.
>
> Is it advisable to go for Normalizing treatment of clad dish end(300
> series clad, Duplex).
>
> As most of the customer ask in the specification that dish end above
> 16mm shall be normalised, can we interpret this that the same is
> applicable for non cladded plates only.
>
> What may be the pros & cons.
>
> Regards
>
> Jaspal Singh
> Quality Assurance
> ISGEC-Yamunanagar
> -9996624244

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[MW:10877] RE: 10751] Reduction in thickness-micro biological attack

Hello Anup,

MIC attack is very common in the industry. Would  you please elaborate on the scenario, e.g:- service, materials of construction and other aspects noted. MIC can be minimized a number of ways. Also reduction in pipe thickness could be alarming if it service is severe, and goes close to the required design thickness.

Feel free to get some basic information at this link:- http://events.nace.org/library/corrosion/Microbial/Introduction.asp

Thanks


Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist & Consultant
Ontario,Canada.
Email-pgoswami@sympatico.ca,
pgoswami@quickclic.net

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of naik_anoop@rediffmail.com
Sent: Tuesday, April 19, 2011 11:49 PM
To: materials-welding@googlegroups.com
Subject: [MW:10751] Reduction in thickness

Can somebody give details on reduction in pipe thickness due to corrosion by micro biological attack.

Regards
Anoop naik

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Re: [MW:10876] RE: Inconel 625 overlay on AISI4140

Dear


 
 For corrosion over lay as per ASME SEC IX    LPT, Hardness and Bend test is essential  and Chemical analysis required if it is mentioned in WPS
RAVIKUMAR T S
SENIOR ENGINEER-




From:        Prakash Hegde <pb.hegde@yahoo.com>
To:        <materials-welding@googlegroups.com>
Date:        04/26/2011 10:51 PM
Subject:        Re: [MW:10872] RE: Inconel 625 overlay on AISI4140
Sent by:        <materials-welding@googlegroups.com>

---

For Overlay weld ,Only corrosion properties are checked and not any other mechanical test .All mechanical properties are calculated on base metal of the component
Regards
Hegde P.b.

---

From: ravi <akravi54@gmail.com>
To: materials-welding@googlegroups.com
Sent: Tue, 26 April, 2011 2:33:19 PM
Subject: Re: [MW:10859] RE: Inconel 625 overlay on AISI4140

Dear Mr Moturu,
 
How are you checking the effect of cyclic loads on the overlay? What kind of testing was carried out?
Regards,
Ravi
On Mon, Apr 25, 2011 at 1:43 PM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:
What is you code of construction, was there any lethal or sour service requirements? Hardness restrictions? Requirement of SCC etc.

What is the tempering temperature of the base material (probably 540 °C is recommended as it should not exceed the tempering temperature), refer the datasheet tempering temperature for this material in the range of 540-680°C

 
From: venu moturu [mailto:moturuvenu@yahoo.com]
Sent: Sunday, April 24, 2011 10:57 AM
To: materials-welding@googlegroups.com
Cc: Bathula Raghuram (Mumbai - PIPING)
Subject: Inconel 625 overlay on AISI4140
 
Dear Friends,
 
Could anyone  pl. advice or guide us  as we wanted to weld corrosion resistant overlay of Inconel 625 on AISI 4140 on a used sub sea equipment in the oil and gas sector , where in the application demands severe Tensile and cyclic loads  on the component . The overlay shall be of approximately 4~5mm on a 100 mm thick section .
 
The vendor has submitted us two procedures with pulsed GMAW (Auto ) welding process having with and without  PWHT . When we referred the procedure with PWHT  we found that  the procedure is qualified (at  540 degreeC @ soaking time 2hrs and rate of heating 150 degree C/Hr)
 
can anyone help me out to send the literature with and without PWHT
 
Best regards
venu
 
 




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Re: [MW:10875] acceptance standards for pittings for SA 516 GR 70 Plates

Dear Mr Ricardo,

 

is it acceptable if plate thickness is  within acceptable limit and piting can be left as it is.

 

is there any surface conditionong/smoothenening is required or not.

 

 

 

pls suggest and give code reference if possible.

 

thanks and regards

On Tue, Apr 26, 2011 at 4:05 PM, Dindo <dindodelacruz@gmail.com> wrote:

Hi Azmi

 

If it is for new construction, then you can check the minimum thickness, If it doesn't meet your PO or thickness requirement then you can reject the plates, the supplier should have fix the pitting on their side and done all NDE required.

 

Ricardo

On Tue, Apr 26, 2011 at 2:01 AM, Kathalingam Babu <kathalingam.qaqc@ppl.com.sg> wrote:

Hi Azmi,

 

CA-Corrosion Allowance

 

You may refer the material spec. to get the CA.

 

Thanks & Regards,

 

K. Babu

 

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

From: asad azmi

To: materials-welding@googlegroups.com

Sent: Tuesday, April 26, 2011 1:17 PM

Subject: Re: [MW:10852] acceptance standards for pittings for SA 516 GR 70 Plates

Dear mr. Babu,

 

construction code is ASME SEC VIII DIV 1.

 

Pittings were observed  on the plates during material receiving inspection.

 

pls inform me what is CA.

 

thanks and regards

On Tue, Apr 26, 2011 at 4:10 AM, Kathalingam Babu <kathalingam.qaqc@ppl.com.sg> wrote:

Hi Azad,

 

You can consider the CA, as allowable depth of pitting allowed for the respective grade.

 

What is the construction code ?

 

Thanks & Regards,

 

K. Babu

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

From: asad azmi

To: materials-welding@googlegroups.com

Sent: Monday, April 25, 2011 8:06 PM

Subject: [MW:10842] acceptance standards for pittings for SA 516 GR 70 Plates

Dear All,

 

Greetings.

 

what is the acceptance standard for pittings on SA 516 GR 70 Plate.

 

I mean what is the depth and diameter allowed.

 

Thanks and Regards

 

Asad Azmi

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RE: [MW:10874] ASME/ASTM equivalent of S355J2+N

Dear Vikas,

The ASTM/ASME equivalent of structural material S355J2+N is ASTM A572 Gr-50

 

Best Regards,

M.K.Choudhary

P.O. Box 877,  Dammam  31421  KSA

Phone  : (+9663) 8471840 X 555

Fax       : (+9663) 8471291

www.zamilsteel.com

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Arunachalam A
Sent: Tuesday, April 26, 2011 9:14 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:10867] ASME/ASTM equivalent of S355J2+N

 

It is NOT ASTM A36. A36 has specified tensile of 420 N/mm2.

 

 

On Tue, Apr 26, 2011 at 4:44 PM, SENTHILKUMAR SWAMINATHAN <skumarswami@yahoo.co.in> wrote:

Vikas,

Refer attached may help you. Hope it is A36 (ASTM)
 

Regards,
S.SENTHILKUMAR

 

 

---

From: Vikas Bhandari <vikas.bhandari349@gmail.com>

To: materials-welding@googlegroups.com

Sent: Tue, 26 April, 2011 9:09:50 AM

Subject: [MW:10855] ASME/ASTM equivalent of S355J2+N

Dear All

 

What is the ASTM/ASME equivalent of structural material S355J2+N (minimum yield strength 355 MPa, Tensile 470 to 630 MPa, C: 0.20 max, Si: 0.55 max, Mn: 1.60 max , CE: 0.45 max). A link to reference document stating the same would be much appreciated.

 

Thanks & best regards

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Abu Dhabi Gas Industries Ltd,

P.O.Box # 50124

Abu Dhabi, UAE

Mobile : +971-50-5257122

 

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Re: [MW:10872] RE: Inconel 625 overlay on AISI4140

For Overlay weld ,Only corrosion properties are checked and not any other mechanical test .All mechanical properties are calculated on base metal of the component

Regards

Hegde P.b.

---

From: ravi <akravi54@gmail.com>
To: materials-welding@googlegroups.com
Sent: Tue, 26 April, 2011 2:33:19 PM
Subject: Re: [MW:10859] RE: Inconel 625 overlay on AISI4140

Dear Mr Moturu,

 

How are you checking the effect of cyclic loads on the overlay? What kind of testing was carried out?

Regards,

Ravi

On Mon, Apr 25, 2011 at 1:43 PM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:

What is you code of construction, was there any lethal or sour service requirements? Hardness restrictions? Requirement of SCC etc.

What is the tempering temperature of the base material (probably 540 °C is recommended as it should not exceed the tempering temperature), refer the datasheet tempering temperature for this material in the range of 540-680°C

 

From: venu moturu [mailto:moturuvenu@yahoo.com]
Sent: Sunday, April 24, 2011 10:57 AM
To: materials-welding@googlegroups.com
Cc: Bathula Raghuram (Mumbai - PIPING)
Subject: Inconel 625 overlay on AISI4140

 

Dear Friends,

 

Could anyone  pl. advice or guide us  as we wanted to weld corrosion resistant overlay of Inconel 625 on AISI 4140 on a used sub sea equipment in the oil and gas sector , where in the application demands severe Tensile and cyclic loads  on the component . The overlay shall be of approximately 4~5mm on a 100 mm thick section .

 

The vendor has submitted us two procedures with pulsed GMAW (Auto ) welding process having with and without  PWHT . When we referred the procedure with PWHT  we found that  the procedure is qualified (at  540 degreeC @ soaking time 2hrs and rate of heating 150 degree C/Hr)

 

can anyone help me out to send the literature with and without PWHT

 

Best regards

venu

 

 

 

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