[MW:977] Re: Root under cut

Root undercut is end result of high Current, travel speed, uneven root gap and some time because of surface tension of the material and last but not least because of welder human error. To avoid under cut mainly focus should be given on current and travel speed. Undercut problems are not envisaged with cellulose electrode if proper welding parameter set along with good skill welder. Some time re shuffling of root welders also help to reduce down root related discontinuities.

 

Regards

 

Paresh

 

On 7/28/08, atul patil <atulpatil99@gmail.com> wrote:

to avoid root undercut

thanks in advance

 

On 7/27/08, Paresh Katvi <pkatvi@gmail.com> wrote:

Dear Atul

 

Ar you looking for information How to avoid root undercut or NDT method to analisied under cut in most sensitive manner?

 

please give further information.

 

Regards

 

Paresh Katvi

 

On 7/22/08, atul patil <atulpatil99@gmail.com> wrote:

Dear all

I am working with Gas export pieline in Kazakhstan

We are using 6010 electrode for root

& 8010 for fill cap

 

we are facing the problem with root undercut

 

Actually on the basis of radiography ( ISO 13847 ) doesnt ask to cmpareason of density with parent metal It says only about length

 

Please guide

It is very difficult to prepare the calibration block for UT ( Manual ) in my city ( Atyrau )

Could you please guide

any  suggestions welcome.

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