Multi and Single Pass fillets-ASME Sec IX

[Vikas Bhandari]

Dear All

According to ASME sec IX, for GTAW, FCAW and GMAW in supplementary essential variables (QW 410.9) , a multi pass per side fillet/butt weld procedure cannot be used to weld single pass per side. (say single pass per side fillet weld.)

I am curious to know the technical reason behind the same. In my opinion, fill pass parameters of a butt weld procedure can be used for welding single pass fillet welds. Please advice if this is incorrect and kindly provide technical/ metallurgical reasoning for the same.

Thanks & best regards

[Kathalingam Babu]

Hi

 

It is because of the reason that, in multipass weld will be tempered and refined by subsequent passes but in case of Single pass will not be.

 

That is the reason , multipass to single pass is considered as SEV, but not vice versa.

 

Thanks & Regards,

 

K. Babu

----- Original Message -----

--
To post to this group, send email to material...@googlegroups.com
To unsubscribe from this group, send email to materials-weld...@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.