Re: [MW:8895] WELDING WITH F Nr. 4 ELECTRODE FOR DOUBLE V

Dear Akhil,

You can very well use E 7018 for welding all the passes, in a double vee joint, you'll have to remove the root pass from the first side and then deposit the weld form the second side.

What ever way you weld, the 7018 weld needs to be done with backing, you use a backing strip or you back grind or back gouge.

please take care of clause QW-404.30, so that you are within the limits.

Regards,

Praveen

--- On Thu, 12/23/10, akcme <akhilcme@gmail.com> wrote:

> From: akcme <akhilcme@gmail.com>
> Subject: [MW:8892] WELDING WITH F Nr. 4 ELECTRODE FOR DOUBLE V
> To: "Materials & Welding" <materials-welding@googlegroups.com>
> Date: Thursday, December 23, 2010, 9:47 AM
> Dear All,
>
>
> From PQR done with E6010(FN 3) as root and E7018 as Hot
> pass and
> capping, can we form WPS with root, hot pass and capping as
> E7018???
>
> From ASME Sec IX it is clearly given that F Nr.4(E7018)
> Qualified wth
> backing is not qualified to carry out without backing.
>
> In double V grove welding can I form this WPS?? Since the
> welding on
> the second side is provided with backing by the first side
> weld.??
>
>
> Regards
>
> Akhil
>
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