[MW:5217] Technical Qery regarding welder performance qualification for ASME Sec ix QW-452.1(b)
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asad azmi
May 23, 2010, 1:38:49 AM5/23/10
to material...@googlegroups.com
Dear All,
Can you please elobrate the meaning of word "ALL" and "1/2 ( 13) and over with a minimum of three layers" from the table QW - 452.1(b) .
also what is the thickness of weld metal qualified if the welder is qualified by BEND Test.( QW-452.1(a))
Thanks & Regards
Asad Azmi
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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.
israr
May 24, 2010, 1:46:47 AM5/24/10
to Materials & Welding
Dear Mr. Asad,
If welder is qualified in position 6G he is qualified for all the
position,
If welder do the welding 13mm with min 3 layers, he is qualified to
weld unlimited thickness but single pass should not be more than 13mm
thick.
Regards
Israr ahmed
On May 23, 8:38 am, asad azmi <azmiasada...@gmail.com> wrote:
> Dear All,
>
> *Can you please elobrate the meaning of word "ALL" and "1/2 ( 13) and
> over with a minimum of three layers" from the table QW - 452.1(b) .*
> **
> *also what is the thickness of weld metal qualified if the welder is
> qualified by BEND Test.( QW-452.1(a))*
> **
> Thanks & Regards
> **
> *Asad Azmi*
If welder is qualified in position 6G he is qualified for all the
position,
If welder do the welding 13mm with min 3 layers, he is qualified to
weld unlimited thickness but single pass should not be more than 13mm
thick.
Regards
Israr ahmed
On May 23, 8:38 am, asad azmi <azmiasada...@gmail.com> wrote:
> Dear All,
>
> *Can you please elobrate the meaning of word "ALL" and "1/2 ( 13) and
> over with a minimum of three layers" from the table QW - 452.1(b) .*
> **
> *also what is the thickness of weld metal qualified if the welder is
> qualified by BEND Test.( QW-452.1(a))*
> **
> Thanks & Regards
> **
> *Asad Azmi*
>
> --
> To post to this group, send email to material...@googlegroups.com
> To unsubscribe from this group, send email to materials-weld...@googlegroups.com
> For more options, visit this group's bolg athttp://materials-welding.blogspot.com/
> --
> To post to this group, send email to material...@googlegroups.com
> To unsubscribe from this group, send email to materials-weld...@googlegroups.com
hpi001
May 24, 2010, 8:13:32 AM5/24/10
to Materials & Welding
Dear Mr. Asad Azmi,
The term "all" in this table 452.1(b) has nothing to do with welding
positions as proposed by Mr. Israr Ahmed but applies on the full
thickness of the specimen welded during qualification also when using
different welding processes and/or combinations of multiple welders.
So when the thickness of the test plate for example was 30 mm with
weld metal over full thickness (t) the thickness range qualified is 2t
which in this case is <60 mm.
The second part applies on the following: If multiple process or
welders are used each process / welder should weld a part of minimum
of 13 mm of the full thickness with min.3 layers in order to receive a
thickness approval range for all thickness's. Qualification is also
only valid for multilayer welding, the comment from Mr. Israr Ahmed
about single layer of max. 13 mm is not mentioned in this table,
besides that a single layer of 13 mm is in my opinion only possible
with SAW process.
So for example let say you have a test piece single side welded of 30
mm in which you execute a root of 4 layers GTAW with a total thickness
of min. 13 mm, for the rest you perform GMAW (17 mm) than your welder
qualification has a thickness validity for GTAW: all thickness with/
wihout backing; for GMAW: all thickness only with backing or back
gouging.
I hope this clarify things for you.
Best Regards,
Herman Pieper
On 23 mei, 07:38, asad azmi <azmiasada...@gmail.com> wrote:
> Dear All,
>
> *Can you please elobrate the meaning of word "ALL" and "1/2 ( 13) and
> over with a minimum of three layers" from the table QW - 452.1(b) .*
> **
> *also what is the thickness of weld metal qualified if the welder is
> qualified by BEND Test.( QW-452.1(a))*
> **
> Thanks & Regards
> **
> *Asad Azmi*
>
The term "all" in this table 452.1(b) has nothing to do with welding
positions as proposed by Mr. Israr Ahmed but applies on the full
thickness of the specimen welded during qualification also when using
different welding processes and/or combinations of multiple welders.
So when the thickness of the test plate for example was 30 mm with
weld metal over full thickness (t) the thickness range qualified is 2t
which in this case is <60 mm.
The second part applies on the following: If multiple process or
welders are used each process / welder should weld a part of minimum
of 13 mm of the full thickness with min.3 layers in order to receive a
thickness approval range for all thickness's. Qualification is also
only valid for multilayer welding, the comment from Mr. Israr Ahmed
about single layer of max. 13 mm is not mentioned in this table,
besides that a single layer of 13 mm is in my opinion only possible
with SAW process.
So for example let say you have a test piece single side welded of 30
mm in which you execute a root of 4 layers GTAW with a total thickness
of min. 13 mm, for the rest you perform GMAW (17 mm) than your welder
qualification has a thickness validity for GTAW: all thickness with/
wihout backing; for GMAW: all thickness only with backing or back
gouging.
I hope this clarify things for you.
Best Regards,
Herman Pieper
On 23 mei, 07:38, asad azmi <azmiasada...@gmail.com> wrote:
> Dear All,
>
> *Can you please elobrate the meaning of word "ALL" and "1/2 ( 13) and
> over with a minimum of three layers" from the table QW - 452.1(b) .*
> **
> *also what is the thickness of weld metal qualified if the welder is
> qualified by BEND Test.( QW-452.1(a))*
> **
> Thanks & Regards
> **
> *Asad Azmi*
>
> --
> To post to this group, send email to material...@googlegroups.com
> To unsubscribe from this group, send email to materials-weld...@googlegroups.com
> For more options, visit this group's bolg athttp://materials-welding.blogspot.com/
> To post to this group, send email to material...@googlegroups.com
> To unsubscribe from this group, send email to materials-weld...@googlegroups.com
hpi001
May 24, 2010, 8:18:13 AM5/24/10
to Materials & Welding
Dear Mr. Asad Azmi,
Forgot to mention the second part of your questions but QW 452.1(a)
only specifies the tests (specimens) required for welder
qualifications and always QW 452.1 (b) applies for determining the
validity range.
Best Regards,
Herman Pieper
On 23 mei, 07:38, asad azmi <azmiasada...@gmail.com> wrote:
> Dear All,
>
> *Can you please elobrate the meaning of word "ALL" and "1/2 ( 13) and
> over with a minimum of three layers" from the table QW - 452.1(b) .*
> **
> *also what is the thickness of weld metal qualified if the welder is
> qualified by BEND Test.( QW-452.1(a))*
> **
> Thanks & Regards
> **
> *Asad Azmi*
>
Forgot to mention the second part of your questions but QW 452.1(a)
only specifies the tests (specimens) required for welder
qualifications and always QW 452.1 (b) applies for determining the
validity range.
Best Regards,
Herman Pieper
On 23 mei, 07:38, asad azmi <azmiasada...@gmail.com> wrote:
> Dear All,
>
> *Can you please elobrate the meaning of word "ALL" and "1/2 ( 13) and
> over with a minimum of three layers" from the table QW - 452.1(b) .*
> **
> *also what is the thickness of weld metal qualified if the welder is
> qualified by BEND Test.( QW-452.1(a))*
> **
> Thanks & Regards
> **
> *Asad Azmi*
>
> --
> To post to this group, send email to material...@googlegroups.com
> To unsubscribe from this group, send email to materials-weld...@googlegroups.com
> For more options, visit this group's bolg athttp://materials-welding.blogspot.com/
> To post to this group, send email to material...@googlegroups.com
> To unsubscribe from this group, send email to materials-weld...@googlegroups.com
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