Saturday, November 13, 2010

Re: [MW:8241] heat input

 Dear Mr. Padmanabhan,
 
 QW-409.26 is for first layer only.
 

QW-409.26 For the first layer only, an increase in heat

input of more than 10% or an increase in volume of weld

metal deposited per unit length of weld of more than 10%

over that qualified.

 

Also in SMAW or GTAW welding variables table for WPS, there is no reference to QW-409.26.

 

I have one more question. During production welding, heat input reading as stated in WPS will be maximum acceptable limit or as stated in PQR.

 

Ahmed Husain
Mob-0547170325




From: G Padmanabhan <gpadmana@gmail.com>
To: materials-welding@googlegroups.com
Sent: Thu, November 11, 2010 1:24:55 PM
Subject: Re: [MW:8209] heat input

Dear Ahmed,
If heat input change is more than 10% of your PQR,WPS is not acceptable as per ASME Sec IX QW 409.26.

On Thu, Nov 11, 2010 at 8:53 AM, Ahmed Husain <ahmraha@yahoo.com> wrote:

 
 

Dear all,

I have come across a WPS for LTCS (with impact test) in which maximum heat input figure is below 800 joules/mm, But the actual heat input figure in supporting PQR is above 800 j/mm.  I have two questions.

1.       WPS is acceptable or not.

2.       Which code/ standard is referred to find out acceptable heat input limit.

Construction code is ASME B31.3; WPS qualification code is ASME SEC IX

With regards
 
 
 Ahmed H.

--
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.



--
With Warm regards,

G.Padmanabhan
+96895685853

--
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.

No comments:

[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...