dear sir thanks for your reply.
1) i mean can we use other electrodes like E7010-P1 or E7018 in pipeline root welding or any other ?
3) Why we use E7010 electrodes in filling/capping with combination of E6010 in root for same API 5L X42 or A106 Gr.B carbon steel pipeline, if E7010 is for alloy steel ?
On Mon, Sep 30, 2013 at 7:08 AM, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote:
E6010 is used only for root weld in pipe line because during welding (cellulose electrodes) decomposes cellulose + water, generates carbon monoxide and Hydrogen, Hydrogen gas is poor electrical conductor and has a high ionization potential that causes the resistance of the arc opening to increase and the electrons emission to decrease, which result in a higher arc voltage and more penetrating arc--On Sun, Sep 29, 2013 at 4:07 PM, Srini Vasan <srinicwi@gmail.com> wrote:E 6010 is most suitable for deeply penetrarion,also it reduces slag inclusion.but if we use E 7018 we cant achieve good penetration.E 6010 electrodes mostly utilized in pipelines,for deep penetration and good characteristics.
On 29 Sep 2013 13:26, "Octane Mac" <octane.mac@gmail.com> wrote:--1) Question is not clear. What do you mean by option?2) E7018 arc is not deeply penetrating like of E60103) E7010-A1 contains 0.5% Mo unlike E6010. There isn't any similar E7010 like E6010. SFA 5.5 deals with alloyed steels and 5.1 with carbon steel.Octane--On Sun, Sep 29, 2013 at 9:57 AM, Sam <onlyprivate2007@gmail.com> wrote:
--Dear experts,1) i want to learn that is there any option of E6010 in root welding of pipe by SMAW available ? i do know that same E6010 used for API 5L grade B, 42 and upto grade 60 also.2) If we use E7018 in root (when it suits UTS of base metal) , what is the main problem ? is it only about slag in inside face and penetration ?3) Why E6010 is AWS SFA 5.1 and same E7010 is AWS SFA 5.5 (both looks same except UTS) ?please answer in details.Regards,sam.
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