Re: [MW:13722] Can we do tack weld by pipe fitters?

Yes you are rigth we need to follow the indicated standart. Because for example  if you check  in API 653 it says ,  10.4.2.7

Tack welds used in the assembly of vertical joints of tank shells shall be removed and shall not remain in
the finished joint when the joints are welded manually. When such joints are welded by the submerged-arc process,
the tack welds shall be thoroughly cleaned of all welding slag but need not be removed provided that they are sound
and are thoroughly fused into the subsequently applied weld beads. Tack welds shall be made using a fillet-weld or
butt-weld procedure qualified in accordance with Section IX of the ASME Code. Tack welds to be left in place shall be
made by qualified welders.
 
It says if your tack will not be include in weld metal ,eg. manuel welding method, you can use unqualified welder

2012/2/16 Doni Afrizal <doni.afrizal@gmail.com>

Dear all,

The question is " Can we do tack weld by pipe fitters according to ASME 31.3? "

so, we should go to ASME B31.3.

The Code said on part 328.5.1 (c) Tack welds shall be made by a qualified welder or welding operator.

Regards,

Doni Afrizal

IdWI, ASNT NDT Level 2 (MT,PT,RI)

On Wed, Feb 15, 2012 at 6:19 PM, manpreet <manpreetsin88@rediffmail.com> wrote:

Hi,

Qualification is required (see applicable design code).

e.g. ASME VIII/1, UW-31 CUTTING, FITTING, AND ALIGNMENT
….
(c) …..Tack welds, whether removed or left in place, shall be made using a fillet weld or butt
weld procedure qualified in accordance with Section IX. …

Regards
Manpreet Singh




On Wed, 15 Feb 2012 09:04:56 +0530 wrote

>Can we do tack weld by pipe fitters according to ASME 31.3?



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