Monday, July 20, 2009

[MW:2722] Re: blow holes in double side welding in H-Beam SAW welding

Sir,
This is to inform you that we are not doing welding in open air. we do SAW welding inside the building .So, as you are saying, wind cannot be the reason. Their has to be some other reason.
Thanks,
Rohit Rawat,
Asst. engg. (QA)

--- On Sun, 19/7/09, Radhakrishnan Venkatraman <r_venkat68@hotmail.com> wrote:

From: Radhakrishnan Venkatraman <r_venkat68@hotmail.com>
Subject: [MW:2714] Re: blow holes in double side welding in H-Beam SAW welding
To: materials-welding@googlegroups.com
Date: Sunday, 19 July, 2009, 5:04 AM

The main reason for blowholes is wind.I think you people are doing welding in openair or may be moisture.Try to avoid these 2 by providing covered environment etc
 
Heat input to be reduced to avoid waviness 
 
Regards
R.Venkataraman    
 
> Date: Fri, 17 Jul 2009 22:31:52 -0700
> Subject: [MW:2702] blow holes in double side welding in H-Beam SAW welding
> From: rohit30584@gmail.com
> To: materials-welding@googlegroups.com
>
>
> Hi everyone out there,
> I am presently working in kirby building systems . we do PEB
> fabrication .we use material ASTM A572 typ1 gr50 .the p[roblem is when
> we do doubl;e side welding, blow holes occur in second side . what is
> the basic reason .allso waviness occurs in flanges of thickness 6mm
> and less,
> thanks,
> rohit rawat
> QA(quality assurance)
>
>
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