Skip to main content

RE: [MW:13443] RE: 13437] ASME Sec. IX changes 2011a - Query on Heat input calculation for weld overlay

By Materials & Welding
Hi Venkat

The Heat input calculation by "volume of weld metal" has been removed. Ie
QW-409.1(b) is not applicable for QW-409.29

BR
M.Vijayan


-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of N VENKATESWARA
PRASAD
Sent: Tuesday, January 10, 2012 10:29 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:13440] RE: 13437] ASME Sec. IX changes 2011a - Query on
Heat input calculation for weld overlay

Hi Vijayan,

Thanks for your reply.

What is changes in QW 409.29. I could not find any difference between
previous and present edition. Can you please eloborate on it.

Regards

VENKAT

On 1/9/12, vijayan <vijayan.m@madinagulf.com> wrote:
> Hi Venkat
>
>
>
> Per Sec IX, QW409.26, for first layer only, an increase of more than
> 10% of Heat input or volume of weld metal qualified requires
Requalification.
>
>
>
> This restriction is only applied to first layer due to the reason
> that, an increase in heat input or volume of WM on first layer, may
> increase the tendency to have more dilution with the base metal.
>
>
>
> In your case, first pass (first Layer-E309LMo) is 0.815 Kj/mm. this
> can be increased to 0.815*1.1=0.896Kj/mm.
>
>
>
> Other passes, there is no restriction on heat input.
>
>
>
> The first layer
>
> QW409.26 refers back to QW409.1 to calculate the heat input or volume
> of weld metal. there you will get more info about wave form controlled
welding.
>
>
>
> [cid:image001.png@01CCCEE9.EEC0DB20]
>
>
>
> BR
>
> M.Vijayan
>
>
>
>
>
> -----Original Message-----
> From:
> materials-welding@googlegroups.com<mailto:materials-welding@googlegrou
> ps.com> [mailto:materials-welding@googlegroups.com] On Behalf Of N
> VENKATESWARA PRASAD
> Sent: Monday, January 09, 2012 2:36 PM
> To: materials-welding
> Subject: [MW:13437] ASME Sec. IX changes 2011a - Query on Heat input
> calculation for weld overlay
>
>
>
> Dear All,
>
>
>
> As per Sec IX 2011 a , there were some changes in Heat input
> calculation regarding overlay. Can any body explain me with expample.
>
>
>
> We have one corrosion overlay qualified on CS material with E309LMO
> and E 316L.
>
>
>
> The heat input for first pass is 0.815 KJ/mm
>
> , second pass 0.7 KJ /mm
>
> final pass 0.715 KJ/mm
>
>
>
> What changes to done in in the WPS as per ASME Sex. 2011a.
>
>
>
>
>
> Regards
>
>
>
> Venkat
>
>
>
> --
>
> To post to this group, send email to
> materials-welding@googlegroups.com<mailto:materials-welding@googlegrou
> ps.com>
>
> To unsubscribe from this group, send email to
> materials-welding+unsubscribe@googlegroups.com<mailto:materials-weldin
> materials-welding+g+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.
>
> ________________________________
> This communication and any files transmitted with it are confidential
> and may also be privileged. It is for the exclusive use of the
> intended recipient(s). If you are not the intended recipient or the
> person responsible for delivering it to the intended recipient(s),
> please note that any form of distribution, copying or use of this
> communication or information contained in it is strictly prohibited
> and may be unlawful. If you have received this communication in error
> please return it to the sender, and delete the material from any
> computer. We reserve the right to monitor email communications through
normal internal and external networks.
> We believe but not warrant that the email and the attachments are
> virus free. The statement and opinions expressed in this communication
> are those of the writer and do not necessarily represent those of
> Madina Group, whose registered office address is
>
> P.O. Box 20459, Doha, Qatar.
> Tel. +974 44600818
> Fax. +974 44603143
>
> --
> 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.

This communication and any files transmitted with it are confidential and may also be privileged. It is for the exclusive use of the intended recipient(s). If you are not the intended recipient or the person responsible for delivering it to the intended recipient(s), please note that any form of distribution, copying or use of this communication or information contained in it is strictly prohibited and may be unlawful. If you have received this communication in error please return it to the sender, and delete the material from any computer. We reserve the right to monitor email communications through normal internal and external networks. We believe but not warrant that the email and the attachments are virus free. The statement and opinions expressed in this communication are those of the writer and do not necessarily represent those of Madina Group, whose registered office address is

P.O. Box 20459, Doha, Qatar.
Tel. +974 44600818
Fax. +974 44603143

--
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.

Comments

Post a Comment

Popular posts from this blog

Re: [MW:34105] SA266 GR4N 4 Cycle SPWHT

By Materials & Welding
Hi,  You are correct, Minimum refers to the one cycle for which this part will expose until final work shop PWHT. hence mill test certificate shall include this.  Max. SPWHT, refers to additional cycles of heat treatment that are reserved for future repairs during equipment lifetime.  Again, these simulated no. Of cycles shall be specified in MTC.  The idea is we need to make sure that steel mechanical properties are not compromised upon exposure to multiple repairs (i e 4 cycles in your case).  One could say, if steel is subjected to 4 cycles and is ok, then it should by defacto be good for one cycle, yet, this is wrong assumption cause mechanical problems and microstructure of materials varies accordingly based on no. Of cycles for which material will expose. This is apparent in alloy steel and especially for impact test values as an example.  In your case, this forged CS with properties before PWHT can be understood to be " as forged" condition (i.e. Wit...
Post a Comment
Read more

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more