Re: [MW:16726] Rolling/Forming of Plug Welded Carbon Steel and Duplex Stainless steel sheets

Hi ! While plug welding and sealing weld at the perifery It is essential to have vent Holes on base of CS plate to avoid any air trapping during welding and rolling , Failing which  will cause failure of Plug weld and seal weld Regards   Hegde Prakash Pune --- On Fri, 8/2/13, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote: From: kannayeram gnanapandithan <kgpandithan@gmail.com> Subject: Re: [MW:16724] Rolling/Forming of Plug Welded Carbon Steel and Duplex Stainless steel sheets To: materials-welding@googlegroups.com Date: Friday, 8 February, 2013, 1:30 PM What contractor says is the best method to achieve result, otherwise difference in expansion of 2 different materials will play major role Pandithan Welding Consultant On 2/8/13, bijoy joseph <bijoy.joseph1@gmail.com> wrote: > Dear Dtta, > You can make grove and plug type joint on the both plates before rolling > and after rolling remove the eah plug and do the seal welding  OR  If  SS > plug is aviliale, then can do the seal welding over it. > Bijoy joseph > > On Thu, Feb 7, 2013 at 11:24 PM, c sridhar <sridhar305@yahoo.com> wrote: > >> Mr. Dutta, >> >> You have mentioned that, 'I would have thought that the flat sheets >> should >> be >> plugwelded to geta single sheet of 36 mm thickness (30 mm SA 516 Grade 70 >> with 6 mmSuperduplex SS lining) and then the entire 36 mm sheet could be >> >> rolled. However our contractor informs that there could be problems in >> the strength of the plug weld and the joints could fail on Rolling.' >> >> As you have rightly pointed out, the SS with higher thick CS could be >> plugged together >> and then rolled. No problems will arise as long as the weld is sound and >> with proper fusion.. >> >> It is a common practice and radiography / Ultrasonic test could be taken >> at random  (or) fully to >> check the quality of the weld if required. >> >> Since you are going to use a SS consumable, the ductility will not be a >> problem and the rolling >> will be successful and you can go ahead positively. >> >> C Sridhar. >> >> >> >> >> >>   -- >> 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/ >> >> http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm >> >> 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. >> --- >> You received this message because you are subscribed to the Google Groups >> "Materials & Welding" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to materials-welding+unsubscribe@googlegroups.com. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > -- > 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/ > http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm > > 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. > --- > You received this message because you are subscribed to the Google Groups > "Materials & Welding" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to materials-welding+unsubscribe@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm 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. --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.

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