Skip to main content

Re: [MW:22177] Rust on Stainless Steel Weld Joints

By Materials & Welding
Hi
I recomended clean whith citric acid if rust is deep, remove the weld .

Agustin jiménez
Level 2 Ut, rt , pt, vt, mt
CWI


'Prakash Hegde' via Materials & Welding <materials-welding@googlegroups.com> escribió:

>Hi!
>In addition to improper use of Wire brush,Excessive grinding caused the removal of Cr Oxide film and after that Improper Pickling and passivation causes such type of rusted surface
>Regards
>
>Hegde Prakash
>
>
>
>--------------------------------------------
>On Sun, 26/10/14, Vino Varghese <vinopvarghese@gmail.com> wrote:
>
> Subject: Re: [MW:22173] Rust on Stainless Steel Weld Joints
> To: materials-welding@googlegroups.com
> Date: Sunday, 26 October, 2014, 8:27 PM
>
> Hi!!
> Most probably the wire brush/grinding wheel
> (Carbon Steel) would have played the culprit.
> Please check that SS wire brush of good quality
> has been used.
> RegardsVino
>
> On Sat, Oct 25, 2014
> at 10:55 PM, Weaver, mark <Mark.Weaver@honeywell.com>
> wrote:
>
>
>
>
>
> Incorrect filler metal or contaminated brush/grinding
> discs. PMI the weld metal to determine metallurgy. 
>
>
>
> Sent from my iPhone
>
>
> On Oct 25, 2014, at 10:51 AM, "Sahavas v s" <sahavas143r@gmail.com>
> wrote:
>
>
>
>
>
>
> Hi,
>
>
>
> It has been observed on all weld joints were corroded with
> rust, but components dont have any rust. can any one answer
> me the reason why weld joints have only corrosion not on
> base metal?
>
>
>
> Pipe : A312 TP 316 L
>
> Filler wire : ER316L
>
> Weld Type : Butt weld
>
> --
>
> 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/
>
> http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>
>  
>
> 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.
>
> ---
>
> You received this message because you are subscribed to the
> Google Groups "Materials & Welding" group.
>
> To unsubscribe from this group and stop receiving emails
> from it, send an email to
> materials-welding+unsubscribe@googlegroups.com.
>
> For more options, visit https://groups.google.com/d/optout.
>
>
>
>
>
>
>
>
> --
>
> 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/
>
> http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>
>  
>
> 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.
>
> ---
>
> You received this message because you are subscribed to the
> Google Groups "Materials & Welding" group.
>
> To unsubscribe from this group and stop receiving emails
> from it, send an email to materials-welding+unsubscribe@googlegroups.com.
>
> For more options, visit https://groups.google.com/d/optout.
>
>
>
>
>
>
> --
>
> 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/
>
> http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>
>  
>
> 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.
>
> ---
>
> You received this message because you are subscribed to the
> Google Groups "Materials & Welding" group.
>
> To unsubscribe from this group and stop receiving emails
> from it, send an email to materials-welding+unsubscribe@googlegroups.com.
>
> For more options, visit https://groups.google.com/d/optout.
>
>
>--
>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/
>http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>
>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.
>---
>You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
>To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
>For more options, visit https://groups.google.com/d/optout.

--
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/
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm

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.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Comments

Post a Comment

Popular posts from this blog

Re: [MW:10788] ON PLOT PIPING & OFF PLOT PIPING

By Materials & Welding
Piping systems involved for the flow lines and gathering lines from the well head isolation valve to the production facility or processing plant isolation valve are determined as OFF PLOT. ON PLOT defines piping system in the processing plant and production platform. ANSI/ASME B31.4 applies for off plot piping system. B31.4 allows the use of either API 1104 or ASME section IX (as appropriate). However, occasionally, a very small system such as piping within 500 feet of a processing plant (some client also said 400 feet) may be declared B31.3 rather than B31.4. When B31.3 is invoked, only ASME Section IX is used. before you decide which code to use for welding procedure and/or welder qualification for pipe welding, you have to know the design and construction code applicable to the system. Please read far enough into scope and diagram illustrating the application of either B31.3 and B31.4 hope this helps rgds 2011/4/21 pradip kumar sil < pradipsil@gmail.com > Dear all, ...
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