Saturday, March 31, 2012

Re: [MW:14034] Alloy stels PWHT - Hydrogen Bake

Dear Sir,
 
First of all P No. of Alloy material shall be mentioned. If it is P 5A & 5B then as per FW's specification if t </= 13 mm.- Cool under insulaiton to ambient temp., If 13<t</=25 mm.- 350º C. for 2 hours, If 25<t</=50 mm.- 350º C. for 4 hours, If t> 50 mm.- Intermediate S.R. at 600º C for 2 hours or 650º C for 1 hour.
 
Might the above be helpful to you.
 
With regards,
 
 
C. R. GANDHI
(MANAGER- Q. A./ Q.C.)

--- On Sat, 3/31/12, Zakaria ghrab <zakaria.ghrab@gmail.com> wrote:

From: Zakaria ghrab <zakaria.ghrab@gmail.com>
Subject: [MW:14031] Alloy stels PWHT - Hydrogen Bake
To: materials-welding@googlegroups.com, materials-welding@goolegroups.com
Date: Saturday, March 31, 2012, 3:50 PM



Dear Experts,
 
 need some reference / support from ASME B31.1 for performing hydrogen bake in alloy steels when is not possible to do immediatly PWHT after Welding for any case.
 
- What's minimum time after welding  when it's mandatory to perform this intermediate cycle
- Holding time and temperature !
- Others requirements (if any)
 
I know that it's necessary to perform this heat treatment but i didn't get support from Code.
 
Regards
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Re: [MW:14033] What is acceptance criteria for root undercut

Dear Sajid,

Please find below the attachments from API 1104 for the acceptance criteria for undercut.

Thanks and Regards,

M.SarojKumar
AWS-CWI and ASNT Level-II NDT in RT,UT,PT,MT
Inspection Engineer.

On Fri, Mar 30, 2012 at 9:24 AM, sajid sakhidas <sajidsakhidas@gmail.com> wrote:
Dear sir,

Good morning,

What is acceptance criteria for root ubndercut for flow line and
pipeline(API1104 or ASME B31.4 and B31.8),if possible please give me
refrance.

Thanks

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Re: [MW:14032] Renewal &Continunity of welder qualification

Dear Friend,
           as per my understanding the welder should be renewed with NDT report. and that NDT report shall be signed by any client for evidence. we have to attach the report with the welder performance record and renew with date of renewal and date of next expiry.
Actually speaking we have to maintain welder history record. from that any client could understand this welder is capable to give good weld. i hope u could catch me. thank you.



--
Regards,
J.C.Andrews
Sr.QA/QC
Bahrain




On Thu, Mar 29, 2012 at 2:00 PM, yahya albalushi <qci.y.albalushi82@gmail.com> wrote:
Gents,

For the welder who has been doing production weld for the last 6
months since his qualification test,Where his company keeping his
performance record.what are the required continuation documents to be
provided to the client in each 6 months? overmore, does his WQT record
needs to be renewed by means of getting stamp of clients QC to
validate his qualification?

Regards,

Yahya
QC(PIPING)
Oman

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[MW:14031] Alloy stels PWHT - Hydrogen Bake



Dear Experts,
 
 need some reference / support from ASME B31.1 for performing hydrogen bake in alloy steels when is not possible to do immediatly PWHT after Welding for any case.
 
- What's minimum time after welding  when it's mandatory to perform this intermediate cycle
- Holding time and temperature !
- Others requirements (if any)
 
I know that it's necessary to perform this heat treatment but i didn't get support from Code.
 
Regards

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[MW:14030] ASTM A666 / ASTM A250 type 304L

Dear Experts,

We are based in Middle  East, can anyone suggest Seamless Pipes & Fittings Manufacturers conforming to below given Standards.

1) ASTM A666 / ASTM A250 type 304L

Thanks with,

Best Regards,

Santosh Karnire
Senior Procurement Engineer



P.O. Box 4988, Fujairah, United Arab Emirates. www.permapipe.ae
Tel   : +971 6 5573338 Ext: 438   |   
Fax    : +971 9 2282541
Cell  : +971 55 6471359              |   Email : skarnire@permapipe.ae

**** Setting the international standard for Pre-insulated Pipe for the District Cooling and Oil & Gas Industries.


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Friday, March 30, 2012

Re: [MW:14029] Speed of Tensile Test


Hi

 

The maximum stress and strain rate limits given in ASTM A370 paragraphs 11.4.1-11.4.3.

The stress or strain rate influences the value of the material strength. A faster strain rate will yield larger strength values, and conversely, slower rates of testing will produce lower values. 

However to provide a consistent testing method , an elastic loading rate of 50 ksi per minute is to be used until after strain hardening.

 

Regards

 

Prem Nautiyal
--- On Wed, 3/28/12, Pushpraj Anand <pushprajanand34@gmail.com> wrote:


From: Pushpraj Anand <pushprajanand34@gmail.com>
Subject: [MW:14006] Speed of Tensile Test
To: "materials-welding" <materials-welding@googlegroups.com>
Date: Wednesday, March 28, 2012, 5:09 PM

What is the speed of tensile test for Procedure qualification as per section IX?

i read some coads they recommended for some speed of tensile test,is
it mandatory to follow or we can do at any speed?
--
Regards,
Pushpraj Anand

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Re: [MW:14028] Heat input value in WPS

Hi Nilesh,
'matter of fact the lower range value is equally important. If the heat input is reduced as compared to PQR values, tendency to harden increases as cooling rate is increased. In your WPS, you need to mention the range as recorded in the PQR.
TG

On Fri, Mar 23, 2012 at 11:53 AM, Prashant Shelar <pshelar@lamprell.com> wrote:

Hi Nilesh,

 

Being impact as a requirement, you will have to limit the maximum Heat Input value in WPS as qualified in the PQR. You will have to indicate the values on WPS with upper limit restricted to that in PQR.

 

Thanking you,

Rgds,

 

Prashant

 

 

 

 

 

 


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of waman nilesh
Sent: Friday, March 23, 2012 11:07 AM
To: materials-welding@googlegroups.com; materials-welding@goolegroups.com
Cc: wamannp@yahoo.com
Subject: [MW:13977] Heat input value in WPS

 

Dear Experts,

I have question we are doing WPS, PQR & WPQ ( Material- IS 2062 GR B & thickness- 20 mm ) as per EN 15614 standard in which impact is essential.

So which value of heat input is to be mention on  WPS.

 

With Regards,

Nilesh

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Tarantula



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Re: [MW:14027] UT Acceptance criteria for Forging

Rajesh,
No. It is more or less decided by a design engineer for individual product.
TG

On Fri, Mar 30, 2012 at 8:42 AM, Prakashraman B <prakashraman.b@doosan.com> wrote:

Dear Mr. Patel,

 

Ref. NB-2540 of ASME Sec III - RULES FOR CONSTRUCTION OF NUCLEAR FACILITY COMPONENTS

 

 

Regards,

Prakash Raman .B

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Rajesh.Patel@Linde-LE.com
Sent: 29 March 2012 12:17
To: materials-welding@googlegroups.com
Subject: [MW:14013] UT Acceptance criteria for Forging

 

Dear all

is there any other acceptance standard available for UT of forging as per ASME/ASTM except Section VIII DIVII and  SA 388 various level

Best Regards

Rajesh Patel

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Tarantula



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[MW:14026] Re: PWHT OF P91 BY INDUCTION HEATING

Dear Pradip Sir,

Thank you very much for valueble informations. We are going to conduct
another PWHT mock test,considering all these facts and skilled
technicians have been called for the same.

Regards,


Sandeep
Qc Engineer

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Re: [MW:14025] P-91 material and Welding


Dear Rohit,

Here i have enclosed for Gr.91 forming & welding Tips, as required by you.


On Wed, Mar 28, 2012 at 2:41 PM, Rohit mn <rhmalhotra84@gmail.com> wrote:
Dear Experts...

Can anyone provide me PPT on P91 material and how to perform welding
and what are the special precaution need to be taken.....

rgds
Rohit

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--
Regards,
G.jayaprakash
Alstom Projects India Ltd,
Durgapur.
09679997249

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RE: [MW:14023] UT Acceptance criteria for Forging

Dear Mr. Patel,

 

Ref. NB-2540 of ASME Sec III - RULES FOR CONSTRUCTION OF NUCLEAR FACILITY COMPONENTS

 

 

Regards,

Prakash Raman .B

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Rajesh.Patel@Linde-LE.com
Sent: 29 March 2012 12:17
To: materials-welding@googlegroups.com
Subject: [MW:14013] UT Acceptance criteria for Forging

 

Dear all

is there any other acceptance standard available for UT of forging as per ASME/ASTM except Section VIII DIVII and  SA 388 various level

Best Regards

Rajesh Patel

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[MW:14022] What is acceptance criteria for root undercut

Dear sir,

Good morning,

What is acceptance criteria for root ubndercut for flow line and
pipeline(API1104 or ASME B31.4 and B31.8),if possible please give me
refrance.

Thanks

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RE: [MW:14021] PWHT OF P91 BY INDUCTION HEATING

Sandeep,

 
AWS D-10.10 is written to facilitate local PWHT for all types of C-Mn and low alloy steels. Grade-91 requires special considerations. Attached is the specification for P-91 and P-92 steels written by one of the well reputed EPC organization in North America. This specification,though a bit generic is downloadable form the link below.
 
I ve highlighted the clauses very relevant to local PWHT on P-91 . You may read and use these recommendations at your discretion.
 
To answer to your point, P-91 requires a complete soak at the suggested PWHT cycle. For guidance in the  attached spec  if the O.D is @ 760 Deg then the ID should be 730 Deg.If induction heating of up to 139 mm thickness could attain this temperature range, then this technique would be acceptable otherwise do not use it subject to your client and your management's discretion.
 
As I mentioned before P-91 is a dangerous steel, IT IS NOT JUST ANOTHER Cr-Mo steel. Hence one has to ensure that a through PWHT is performed on weld of this grade.
 
I have cross referred the clauses of D-10.10, you had mentioned in your earlier email.But AWS interpretation(see attached) looks different.
 
Also see below the purple colored text on what AWS recommends on uniformity of temperature for a PWHT operation.
 
I would say discuss this issue with the PWHT contractor such that the temperature could be maintained within the range as specified above.
 
Thanks.




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

http://www.scribd.com/doc/47805169/Q110-Welding-of-9Cr-1Mo-V-Grade-91-and-9Cr-2W-Grade-92


 

D -10.10

11.1 Temperature Uniformity. Requirements regarding temperature uniformity are generally specified separately for the heating/cooling and hold portions of the PWHT cycle. ASME Section III limits temperature variation during heating and cooling to not more than 250°F (138.9°C) within any 15 ft (4.6 m) interval of weld length. This limit generally acts as a circumferential temperature gradient due to the fact that it is most often applied to  heating of circumferential butt welds. The requirement in B31.3 which states "The heating method shall provide the required metal temperature, metal temperature uniformity,... " does not provide useful guidance. Generally, the required uniformity during the hold period amounts to staying within the bounds of the maximum and minimum temperature requirements specified by the codes.

Concerns about temperature uniformity during PWHT are related to the resulting stresses and possible distortion or cracking which could occur as discussed in 11.2 and 11.4. Use the lesser of the maximum temperature differences shown below or that provided in the governing document for PWHT.

Maximum Recommended Temperature Differences for PWHT:- During heating and cooling, the maximum temperature difference within the heated band should be 250°F (139°C) or as limited by the maximum axial temperature gradient.During hold, the maximum temperature difference within the soak band should be 100°F (55°C) or the allowed temperature range, whichever is less. During hold, the maximum temperature difference around any circumferential plane within that portion of the heated band outside of the soak band should be 100°F (55°C)


-----Original Message-----
From: materials-welding@googlegroups.com [
mailto:materials-welding@googlegroups.com] On Behalf Of sandeep monody
Sent: Wednesday, March 28, 2012 2:58 AM
To: Materials & Welding
Subject: Re: [MW:14003] PWHT OF P91 BY INDUCTION HEATING

Dear Pradip Sir,

Thank you very much for your valuable information. Still some doubts are there as given below.

As per AWS D10.10( Clause2.3.1)temperature variation up to 83deg is acceptable and AWS D10.10 itself says that there is no way to eliminate temperature variation though out the wall thickness(Clause 2.3).

Actually in our site we have materials with various thicknesses and some up to 139mm and now question is.. what will be the temperature variation for 139mm thickness(On jobs its not possible to measure inside temperature).

Have any equation or formula to find out the temperature variation throughout the thickness?

Have any role of Thermal conductivity of P91 in this case?

Is it possible a uniform temperature at OD and ID regardless of thickness?

Awaits for your reply

Thanks and regards

Sandeep
QC Engineer

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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.

RE: [MW:14020] PWHT OF P91 BY INDUCTION HEATING

Sandeep,

 
AWS D-10.10 is written to facilitate local PWHT for all types of C-Mn and low alloy steels. Grade-91 requires special considerations. Attached is the specification for P-91 and P-92 steels written by one of the well reputed EPC organization in North America. This specification,though a bit generic is downloadable form the link below.
 
I ve highlighted the clauses very relevant to local PWHT on P-91 . You may read and use these recommendations at your discretion.
 
To answer to your point, P-91 requires a complete soak at the suggested PWHT cycle. For guidance in the  attached spec  if the O.D is @ 760 Deg then the ID should be 730 Deg.If induction heating of up to 139 mm thickness could attain this temperature range, then this technique would be acceptable otherwise do not use it subject to your client and your management's discretion.
 
As I mentioned before P-91 is a dangerous steel, IT IS NOT JUST ANOTHER Cr-Mo steel. Hence one has to ensure that a through PWHT is performed on weld of this grade.
 
I have cross referred the clauses of D-10.10, you had mentioned in your earlier email.But AWS interpretation(see attached) looks different.
 
Also see below the purple colored text on what AWS recommends on uniformity of temperature for a PWHT operation.
 
I would say discuss this issue with the PWHT contractor such that the temperature could be maintained within the range as specified above.
 
Thanks.




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

http://www.scribd.com/doc/47805169/Q110-Welding-of-9Cr-1Mo-V-Grade-91-and-9Cr-2W-Grade-92


 

D -10.10

11.1 Temperature Uniformity. Requirements regarding temperature uniformity are generally specified separately for the heating/cooling and hold portions of the PWHT cycle. ASME Section III limits temperature variation during heating and cooling to not more than 250°F (138.9°C) within any 15 ft (4.6 m) interval of weld length. This limit generally acts as a circumferential temperature gradient due to the fact that it is most often applied to  heating of circumferential butt welds. The requirement in B31.3 which states "The heating method shall provide the required metal temperature, metal temperature uniformity,... " does not provide useful guidance. Generally, the required uniformity during the hold period amounts to staying within the bounds of the maximum and minimum temperature requirements specified by the codes.

Concerns about temperature uniformity during PWHT are related to the resulting stresses and possible distortion or cracking which could occur as discussed in 11.2 and 11.4. Use the lesser of the maximum temperature differences shown below or that provided in the governing document for PWHT.

Maximum Recommended Temperature Differences for PWHT:- During heating and cooling, the maximum temperature difference within the heated band should be 250°F (139°C) or as limited by the maximum axial temperature gradient.During hold, the maximum temperature difference within the soak band should be 100°F (55°C) or the allowed temperature range, whichever is less. During hold, the maximum temperature difference around any circumferential plane within that portion of the heated band outside of the soak band should be 100°F (55°C)


-----Original Message-----
From: materials-welding@googlegroups.com [
mailto:materials-welding@googlegroups.com] On Behalf Of sandeep monody
Sent: Wednesday, March 28, 2012 2:58 AM
To: Materials & Welding
Subject: Re: [MW:14003] PWHT OF P91 BY INDUCTION HEATING

Dear Pradip Sir,

Thank you very much for your valuable information. Still some doubts are there as given below.

As per AWS D10.10( Clause2.3.1)temperature variation up to 83deg is acceptable and AWS D10.10 itself says that there is no way to eliminate temperature variation though out the wall thickness(Clause 2.3).

Actually in our site we have materials with various thicknesses and some up to 139mm and now question is.. what will be the temperature variation for 139mm thickness(On jobs its not possible to measure inside temperature).

Have any equation or formula to find out the temperature variation throughout the thickness?

Have any role of Thermal conductivity of P91 in this case?

Is it possible a uniform temperature at OD and ID regardless of thickness?

Awaits for your reply

Thanks and regards

Sandeep
QC Engineer

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Thursday, March 29, 2012

Re: [MW:14022] RE: 14017] Renewal &Continunity of welder qualification

Thanks John,
 
I do know about the 6 months renewal of qualification if the welder did not weld.But specificaly I am asking about the welder who is continuing production weld for the last 6 months since his qualification date.
 
My doubts are:
1.I was working with my former employer where we used to get monthly welder performance recod + when a welder complets 6 months from his qualification date ,the contractor QC used to bring a record of his accepted weld joints within the last 3 months so we as a client QC RENEW the welder card by means of  giving company's stamp & signeture so he becoms renewed to carry on welding for the next 6 months.over more, If we find a welder in the field doing welding without Welder ID we suspend him from welding unless his card with him.Even though we know his performance is satisfactory .
2. I am now with new employer where I noticed the welders cards without renewual date .Since then I started to assume that they must be renewed as what I used to do with the former employer.
3.I fully understand that when a welder is welding for the last 6 months doesn't need requalification nor test if his performance is good.the only thing is what I requir is to be provided with Continuty of welder qualification record by means of doing the same as per point No 1 above.
4- I know it would be confusing or not required to do so as long Sec IX dosn't mention such a thing in regard to contractor providin Contiuty of welder qualification to the client in case of welders used to weld for the last 6 month.But Sec IX mentioned in QW.300.3 that welders continuty record to be provided.
5. It would be my own interpretation for the code or my former employer practic in this regard.
 
lastly,
Currently, We have more than one contractor where all are providing us with welder Continuty of qualification record to be signed each 6 month for the welder who are producing weld for the last 6 months.
 
 
Regards,
 
Yahya

2012/3/29 John Henning <jhenning@deltak.com>
If you are going by ASME Boiler and Pressure Vessel Code, there are no
requirements (Interpretation IX-95-38) provided by ScIX on how or when
continuity is to be recorded.  ScIX only states that the weldor is
qualified for 6 months from the last time he used the PROCESS
(Interpretation IX-10-17).

Below is the HSB(r) information on IX-95-38:

ASME Code Interpretations

Status:  Currently Valid
Status Description:


Interpretation: IX-95-38
Subject: Section IX, QW-322, Expiration and Renewal of Qualification
Date Issued: January 6, 1997
File Number: BC96-132
Related Documents:

Question: Is it a requirement of QW-322 for a manufacturer to maintain
records to demonstrate a welder's or welding operator's continuing
qualification for a process from the date of the original qualification
test?

Reply: Section IX does not address how conformance to QW-322 is
demonstrated. Other book sections may address the maintenance of
records.

The above interpretation was transcribed by HSB Code Services from the
official publications [ASME published volumes, National Board,
Eurodyne]. Although every effort was made to accurately reproduce this
interpretation, use of this information should be for research only. It
is strongly recommended that the official published document be used for
Code business.


What I do is scan the weldors records each month and record in a
database the last use of the process for each month.  I include the
drawing number for the work he was involved in.  From this data I can
pull any QA records for the weld if necessary to satisfy a customer or
their inspector.

EN specs are more prescriptive then ASME and require the continuity weld
to be of the same type as the qualifying weld, to be volumetrically
examined, etc.

John A. Henning
Welding & Materials

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of yahya albalushi
Sent: Thursday, March 29, 2012 6:01 AM
To: Materials & Welding
Subject: [MW:14017] Renewal &Continunity of welder qualification

Gents,

For the welder who has been doing production weld for the last 6 months
since his qualification test,Where his company keeping his performance
record.what are the required continuation documents to be provided to
the client in each 6 months? overmore, does his WQT record needs to be
renewed by means of getting stamp of clients QC to validate his
qualification?

Regards,

Yahya
QC(PIPING)
Oman

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[MW:14019] RE: 14017] Renewal &Continunity of welder qualification

If you are going by ASME Boiler and Pressure Vessel Code, there are no
requirements (Interpretation IX-95-38) provided by ScIX on how or when
continuity is to be recorded. ScIX only states that the weldor is
qualified for 6 months from the last time he used the PROCESS
(Interpretation IX-10-17).

Below is the HSB(r) information on IX-95-38:

ASME Code Interpretations

Status: Currently Valid
Status Description:


Interpretation: IX-95-38
Subject: Section IX, QW-322, Expiration and Renewal of Qualification
Date Issued: January 6, 1997
File Number: BC96-132
Related Documents:

Question: Is it a requirement of QW-322 for a manufacturer to maintain
records to demonstrate a welder's or welding operator's continuing
qualification for a process from the date of the original qualification
test?

Reply: Section IX does not address how conformance to QW-322 is
demonstrated. Other book sections may address the maintenance of
records.

The above interpretation was transcribed by HSB Code Services from the
official publications [ASME published volumes, National Board,
Eurodyne]. Although every effort was made to accurately reproduce this
interpretation, use of this information should be for research only. It
is strongly recommended that the official published document be used for
Code business.


What I do is scan the weldors records each month and record in a
database the last use of the process for each month. I include the
drawing number for the work he was involved in. From this data I can
pull any QA records for the weld if necessary to satisfy a customer or
their inspector.

EN specs are more prescriptive then ASME and require the continuity weld
to be of the same type as the qualifying weld, to be volumetrically
examined, etc.

John A. Henning
Welding & Materials

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of yahya albalushi
Sent: Thursday, March 29, 2012 6:01 AM
To: Materials & Welding
Subject: [MW:14017] Renewal &Continunity of welder qualification

Gents,

For the welder who has been doing production weld for the last 6 months
since his qualification test,Where his company keeping his performance
record.what are the required continuation documents to be provided to
the client in each 6 months? overmore, does his WQT record needs to be
renewed by means of getting stamp of clients QC to validate his
qualification?

Regards,

Yahya
QC(PIPING)
Oman

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Re: [MW:14018] Renewal &Continunity of welder qualification

As per my understanding there is no need to get renewal of WQT if the welder still work at the same company of the WQT he attend. only required if the welder work with other company for a duration 6 month above then he needs to get renewal. if you want prove to your client for your welder performance, do PRODUCTION TEST.
On Mar 30, 2012 12:11 AM, "yahya albalushi" <qci.y.albalushi82@gmail.com> wrote:
>
> Gents,
>
> For the welder who has been doing production weld for the last 6
> months since his qualification test,Where his company keeping his
> performance record.what are the required continuation documents to be
> provided to the client in each 6 months? overmore, does his WQT record
> needs to be renewed by means of getting stamp of clients QC to
> validate his qualification?
>
> Regards,
>
> Yahya
> QC(PIPING)
> Oman
>
> --
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[MW:14017] Renewal &Continunity of welder qualification

Gents,

For the welder who has been doing production weld for the last 6
months since his qualification test,Where his company keeping his
performance record.what are the required continuation documents to be
provided to the client in each 6 months? overmore, does his WQT record
needs to be renewed by means of getting stamp of clients QC to
validate his qualification?

Regards,

Yahya
QC(PIPING)
Oman

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[MW:14016] RE: 14005] P-91 material and Welding

Dear Rohit,
May be we can discuss further on P91 welding, selection of filler alloys,
heat cycle, etc.

Meanwhile, please review the attached brochure.
Thanks

With Kind Regards

Amitabha Bhattacharya
Head-Application Technology
 
Bohler Welding Group India Pvt. Ltd.
A-140, Road No 23, Wagle Industrial Estate
Metropolitan, Ground Floor
Thane 400 604, India
Ph: +91 22 2582 8855/4228 4400
Mobile ;+91 9833998246

Email: amitabha.bhattacharya@bwgindia.com
Web: www.bohlerweldinggroupindia.com
A Böhler Welding Group Company

This email message and any attachments are for the sole use of the intended
recipient(s) and contain confidential and/or privileged information. Any
unauthorized review, use, disclosure or distribution is prohibited. If you
are not the intended recipient, please contact the sender by reply email and
destroy all copies of the original message and any attachments

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Rohit mn
Sent: Wednesday, March 28, 2012 2:41 PM
To: Materials & Welding
Subject: [MW:14005] P-91 material and Welding

Dear Experts...

Can anyone provide me PPT on P91 material and how to perform welding and
what are the special precaution need to be taken.....

rgds
Rohit

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Re: [MW:14015] Speed of Tensile Test

Dear Puspraj,

I think following answer satisfies your query :

Tensile strength increases but ductility decreases as the testing speed is increased. The speed of the cross head of the tensile machine therefore needs to be controlled and BS EN 10002 specifies a stress rate range of 6MPa per second to 60MPa per second. The ASTM specifications have similar - but not identical - requirements.

jk70f4.gif
                                                                   Effect of speed of testing on strength and ductility

 

On Wed, Mar 28, 2012 at 5:09 PM, Pushpraj Anand <pushprajanand34@gmail.com> wrote:
What is the speed of tensile test for Procedure qualification as per section IX?

i read some coads they recommended for some speed of tensile test,is
it mandatory to follow or we can do at any speed?
--
Regards,
Pushpraj Anand

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[MW:14014] swivel flange

Dear All
In my project,contractor uses two types swivel ring flange that the rating & type of material of them are same, but swivel ring sit for one of them has conic at the end and remind has flat face.
Is it possible this geometry cause failure during operation?if yes why?
Regards

[MW:14013] UT Acceptance criteria for Forging

Dear all

is there any other acceptance standard available for UT of forging as per ASME/ASTM except Section VIII DIVII and  SA 388 various level

Best Regards

Rajesh Patel

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Re: [MW:14012] Can SMAW welders qualified in matl Grade A36 weld also S355 ..ASME section IX

All materials comes under same P number. So no need to qualify again.
 
Arvinda

On Tue, Mar 27, 2012 at 10:19 AM, Anthony <hepolitodias@gmail.com> wrote:
we generally have welders qualified to A36 in our firm as per sec
presently we are working on a project demanding S355 JR /JO and we
have qualified the procedure and wleders also but can i use my other
welders who are qualified in A36[3G]  and A106 Gr B [6G] as per ASME
sec IX

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Re: [MW:14011] ASME sect IX - Welders Performance Qualification

Dear Mr.Zakaria,
 
You are absolutely ok.
 
Once welder is qualified on GTAW procees , he can weld both SS and CS materials in same process. If welder goes for SMAW  needs to qualify in SMAW process since changing F number.
 
Arvinda

On Mon, Mar 26, 2012 at 9:03 PM, Zakaria ghrab <zakaria.ghrab@gmail.com> wrote:
Dear Experts,

  I need some confirmation / explain from your part.

I have welders qualified for GTAW process in carbon steel coupon test material, according my understanding for ASME sect IX welders performance qualification, welders is qualified to weld Stainless steel under all essential variable requirement are ok. IT's our case (Same FN°6 filler metal, added backing gas....).

But our client, said that, according ASME sect IX QW-423.1, welders can not be qualified to weld Stainless steel (PN°8) , it's mention that "When a base metal shown in the left column is used for welder qualification, the welder is qualified to weld all combinations of base metals shown in the right column" means as their explain, Welder qualified with carbon steel coupon can weld CS to one of (PN°1 to PN°11) but not PN°X to PN°X, X from 1 to 11.

Can you confirm if i'm right and how to get confirmation from ASME sect IX, means what's the means of "combination" in ASME sect IX QW-423.1).



Regards



----
Zakaria

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Re: [MW:14010] ASME sect IX - Welders Performance Qualification

Hi,
QW 423.1 says clearly that "ALL COMBINATION OF BASE METALS"
It means If you qualified with P.No.1 then the welder qualified to weld all combination of base metals of P- or S-No. 1 through P- or S- No. 11, P- or S-No. 34,and P- or S-No. 41 through P- or S-No. 49.
ALL Combination means either P1 to P1 or P1 to other P numbers as specified.
So he can weld P1 to P1 as well as P1 to P8 etc.,and as specified in the right column of QW423.1.
When a base metal
shown in the left column is used for welder qualification,
the welder is qualified to weld all combinations of base
metals shown in the right column, including unassigned
metals of similar chemical composition to these metals.
 
Thanks & Regards,

(Karthik)

Karthikeyan.S
QA/QC Manager
German-Thai Boiler Engineering Cooperation Limited.
Rayong Factory ;
379 Moo.6 Soi 8, Tambol Pananikom,
Nikompattana, Rayong 21180 THAILAND
Tel : +66 38 897 035-9 Ext. 137
Fax : +66 38 897 034
Hand Phone: 0066 892512282


From: Zakaria ghrab <zakaria.ghrab@gmail.com>
To: materials-welding@googlegroups.com
Sent: Tuesday, March 27, 2012 12:03 AM
Subject: [MW:13997] ASME sect IX - Welders Performance Qualification

Dear Experts,

  I need some confirmation / explain from your part.

I have welders qualified for GTAW process in carbon steel coupon test material, according my understanding for ASME sect IX welders performance qualification, welders is qualified to weld Stainless steel under all essential variable requirement are ok. IT's our case (Same FN°6 filler metal, added backing gas....).

But our client, said that, according ASME sect IX QW-423.1, welders can not be qualified to weld Stainless steel (PN°8) , it's mention that "When a base metal shown in the left column is used for welder qualification, the welder is qualified to weld all combinations of base metals shown in the right column" means as their explain, Welder qualified with carbon steel coupon can weld CS to one of (PN°1 to PN°11) but not PN°X to PN°X, X from 1 to 11.

Can you confirm if i'm right and how to get confirmation from ASME sect IX, means what's the means of "combination" in ASME sect IX QW-423.1).



Regards



----
Zakaria

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Wednesday, March 28, 2012

[MW:14008] RE: 13998] Can SMAW welders qualified in matl Grade A36 weld also S355 ..ASME section IX

Only if you can meet the requirements of QW-423.1 and QW-423.2 for
unlisted materials similar to listed materials. I have found it is
generally a tough sell to customers.

John A. Henning
Welding & Materials

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Anthony
Sent: Tuesday, March 27, 2012 1:20 AM
To: Materials & Welding
Subject: [MW:13998] Can SMAW welders qualified in matl Grade A36 weld
also S355 ..ASME section IX

we generally have welders qualified to A36 in our firm as per sec
presently we are working on a project demanding S355 JR /JO and we have
qualified the procedure and wleders also but can i use my other welders
who are qualified in A36[3G] and A106 Gr B [6G] as per ASME sec IX

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[MW:14007] RE: 13997] ASME sect IX - Welders Performance Qualification

While your customer is being a bit thick, I think you can show the essence of what the Code means by an old interpretation, IX-83-70.  As noted by HSB this interpretation is more limiting than the current Code but the essence is that for a given filler metal, i.e. F-number, the welder can be qualified by alternative base metals.  In the case of the interpretation the filler metal is SMAW and desired result is to weld nickel based base metals.  The Code Case clearly states that welding P1 to P1 with the appropriate filler metal qualifies welding P4X.  One could also look at Interpretations IX-86-51 and IX-89-15.

 

Status Description: QW-423.1 has expanded the range of qualified production base metals beyond those listed in the Question. (2010 Edition)

Interpretation:

IX-83-70

Subject:

Section IX, QW-310.5(c)

Date Issued:

June 27, 1983

File Number:

BC83-270

Related Documents:


Question: A manufacturer has qualified WPS for welding P-Nos. 41 through 45 with the SMAW process using the appropriate filler metals. May a welder be qualified using the SMAW process for welding P-Nos. 41 through 45 by welding a test coupon of these P-Numbers or combinations thereof, or P-No. 1 welded to itself or to any of the above P-Numbers using the filler metal of the qualified WPS?


Reply: Yes.


The above interpretation was transcribed by HSB Code Services from the official publications [ASME published volumes, National Board, Eurodyne]. Although every effort was made to accurately reproduce this interpretation, use of this information should be for research only. It is strongly recommended that the official published document be used for Code business.

 

Beyond that QW-423.1 reads (in part)  “. . . When a base metal shown in the left column is used for welder qualification, the welder is qualified to weld all combinations of base metals shown in the right column . . .”.  Last I checked, all means ALL.  All would include  any combination of the listed base metals welded to themselves.

 

Good luck.  Customers with only a little knowledge can be a giant pain in the derrière.

 

John A. Henning

Welding & Materials

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Zakaria ghrab
Sent: Monday, March 26, 2012 12:04 PM
To: materials-welding@googlegroups.com
Subject: [MW:13997] ASME sect IX - Welders Performance Qualification

 

Dear Experts,

 

  I need some confirmation / explain from your part.

 

I have welders qualified for GTAW process in carbon steel coupon test material, according my understanding for ASME sect IX welders performance qualification, welders is qualified to weld Stainless steel under all essential variable requirement are ok. IT's our case (Same FN°6 filler metal, added backing gas....).

 

But our client, said that, according ASME sect IX QW-423.1, welders can not be qualified to weld Stainless steel (PN°8) , it's mention that "When a base metal shown in the left column is used for welder qualification, the welder is qualified to weld all combinations of base metals shown in the right column" means as their explain, Welder qualified with carbon steel coupon can weld CS to one of (PN°1 to PN°11) but not PN°X to PN°X, X from 1 to 11.

 

Can you confirm if i'm right and how to get confirmation from ASME sect IX, means what's the means of "combination" in ASME sect IX QW-423.1).

 

 

 

Regards

 

 

 

----

Zakaria

 

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[MW:35346] Cast-iron welding

Any advice for cast iron welding Sent from Yahoo Mail for iPhone