Re: Re: [MW:8173] weld thicness

Hi

 

This fire has been discussed earlier.

 

Pls find the attached article , which is clearly says that, the welder has to weld the entire circumference.

 

Though the answer is logical based , but it is acceptable and recognized by AWS Committee.

 

Regards

 

K.Babu

Singapore

 

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

From: muthu barathi

To: materials-welding@googlegroups.com

Sent: Tuesday, November 09, 2010 8:38 PM

Subject: Re: Re: [MW:8166] weld thicness

Hi,
Please do not try to mislead under confusion . in this way for example if your say 5 welders qualified maximum range is 10mm. if u want to weld 50 mm thick weld how you will weld ? will you ask your 5 welder to weld each 10mm ? under which code ? again u read the code carefully.

QW-452.1(b)
THICKNESS OF WELD METAL QUALIFIED
Thickness, t, of Weld Metal in Thickness of Weld
the Coupon, in. (mm) Metal Qualified
[Notes (1) and (2)] [Note (3)]
All 2t
1⁄2 (13) and over with a Maximum to be
minimum of three layers welded
NOTES:
(1) When more than one welder and/or more than one process and
more than one filler metal F-Number is used to deposit weld metal
in a coupon, the thickness, t, of the weld metal in the coupon
deposited by each welder with each process and each filler metal
F-Number in accordance with the applicable variables under QW-
404 shall be determined and used individually in the "Thickness,
t, of Weld Metal in the Coupon" column to determine the "Thickness
of Weld Metal Qualified."
(2) Two or more pipe test coupons with different weld metal thickness
may be used to determine the weld metal thickness qualified and
that thickness may be applied to production welds to the smallest
diameter for which the welder is qualified in accordance with
QW-452.3.
(3) Thickness of test coupon of 3⁄4 in. (19 mm) or over shall be used
for qualifying a combination of three or more welders each of
whom may use the same or a different welding process.
142








On Tue, 09 Nov 2010 16:42:35 +0530 wrote
>
Hi,

*Code allows. Refer Interpreatation IX-77-19 of ASME Sec IX;
A welder qualfied in a given procedure and for a given max. thickness may weld on a pipe of greater wall thickness provided the thickness deposited does not excedd his qualification. However, the welder must follow a WPS that has a PQR qualification necessary to weld the full pipe thickness in production.

* Additional info, refer QW-306 of ASME Sec IX allowscombination qualification for 2 or more welders in a single coupon
>
Regards.

>


From: muthu barathi
>To: materials-welding@googlegroups.com
>Sent: Mon, 8 November, 2010 7:19:41 PM
>Subject: Re: [MW:8147] weld thicness
>
>
No not at all. no codes permit.
>
>if a welder qualifies as per ASME sec IX. say 1o mm thk. maximum he can weld 2T ie. 2O MM ONLY.
>
>not changing location , it never works .
>try to requalify them. always try to qualify 13mm and above with multilayers then he will be eligible to weld unlimited thk as per sec IX. same time you have to consider which code you are using as per job requirement.
>
>
>
>On Mon, 08 Nov 2010 11:57:35 +0530 wrote
>>Dear All,
>I need your valuable information/comment on following case.
>There is a situation where 2 welders are qualified to weld 12mm thick. Ifthe job thickness is 20 mm and dia, sayis 36", contractor divide the joint in half. First simultaneously, each willweld approx 10mm thick including root half the circum, as they are qualified in 12 mm only. Then the interchange their location and they will complete the remaining welding.
Basically these 2 welders who are qualified upto 12 mm are welding 20mm thickness joint, but at any given location they are welding 10mm thickness.
>
>Is this practice is acceptable.
>
>Regards,
>
>Ahmed H.
>
>
>
>
>
>
>--
>>
>To post to this group, send email to materials-welding@googlegroups.com
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>>
>
>
>Dear Sir,
>
>
>
>
>
>Thanking You,
>
>Honesty is the best Policy
>
>With Warm Regards,
>
>Muthu Barathi P
>Mobile No:00962788269821 (Jordan)
>00962775401951
>




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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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>
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To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
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For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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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.
>


Dear Sir,





Thanking You,

Honesty is the best Policy

With Warm Regards,

Muthu Barathi P
Mobile No:00962788269821 (Jordan)
00962775401951

--
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.