Re: [MW:8946] defects in SMAW process

what could be the reason apart from backing the electrodes improperly  for defects  porosity, lack of fusion, under cuts, cracks and burnthrough in SMAW process when welding A53 Gr.B pipes. we got these defects. can  anybody elaborate in  detail about these defects and measures to be taken for good quality weld.

 

thanks,

shankark

On Fri, Dec 24, 2010 at 6:50 PM, mohammad ali <samanaligarh@yahoo.com> wrote:

The defects are; porosity, lack of fussion, under cuts, cracks etc   To avoid most of them make sure E 7018 is backed properly  as per electrode manufacturer's recomendations.     asif     --- On Fri, 24/12/10, shankark <shankark.qc@gmail.com> wrote: From: shankark <shankark.qc@gmail.com> Subject: [MW:8931] defects in SMAW process To: "Materials & Welding" <materials-welding@googlegroups.com> Date: Friday, 24 December, 2010, 10:34 AM we are using A53 gr. B material for pipeline project. in SMAW process, what defects we can expect in root, hotpass, fillup and capping.  we are using E6010 2.5 mm for root and E7018 2.5 mm for hotpass and capping.  for each defect, what measures we need to take for getting good quality weld.. thanks, shankark -- 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/ 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.

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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.