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Re: [MW:28360] RE: 28355] Water Vapor in welded joints

By Materials & Welding
Hi
I also experienced the same but my observation is perticularly in night shift where welders are not particular about removing and cleaning the slag from welded joint and remains till morning Such practices causing moisture accumulation in the visinity of such jt
Therefore We had made mandatory to clean the weld joint free of slag Which has given us good results
Regards
Hegde


On Fri, 28 Sep 2018 at 19:59, PGoswami
<pgoswami@quickclic.net> wrote:

Hi,

This is a case of moisture condensation. It's possible if the relative humidity(RH) factor is high, typically above 60% or more. In Indian subcontinent after the Monsoon RH could be very high contributing to this. Where's the location of your plant? Do you have any humidity control in the shop floor?, it may help.

Stainless steel does not require any preheating however some preheating ( typically up to 30-40 DegC)  is advisable to get rid of the moisture accumulation, typically happening due to condensation.

 

Thanks.

 

P.Goswami.P.Eng, IWE.

Welding & Metallurgical Specialist

Email:pgoswami@quickclic.net,pradip.goswami@gmail.com

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Hareesh K V
Sent: September 28, 2018 12:24 AM
To: materials-welding <materials-welding@googlegroups.com>
Subject: [MW:28355] Water Vapour in welded joints

 

Dear Veterans, 

 

After the cooling of weld joints, water vapor is seen in the surface of weld joints. What is the reason? This is particularly seen in SS welded joints. 

 

Regards, 

 

Hareesh K V

+91-8547859202

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