[MW:1156] Re: FCAW --- UT / RT ???

Dear Friend, FCAW is prone to these deffects if you consumable is not having capability to produce the sound weld. First of all the filler shall have the low hydrogen (H4 at least). If your wire spool is kept in open area it pick up the moisture and create problem of porosity.

 

Again skill of the welder is most important thing when we use FCAW. Normal SMAW welders are not comfortable with this procedure and if they weld with FCAW, most of the time LOF comes in. If you have resources (time and money), I will suggest to do welder qualification with bend test (not just RT), that will solve your problem of LOF.   

If any one have some other input .........most welcome.

 

C. K. Purohit
General Manager - QA/QC/NDT/R&D
KNM Process Systems Sdn Bhd.
HP :    +616 3376448
Phone : +603 89460338
Fax   : +603 89460333

-----Original Message-----
From: greetings <senthilthandesh@gmail.com>
To: materials-welding@googlegroups.com
Date: Mon, 22 Sep 2008 16:54:45 +0400
Subject: [MW:1155] Re: FCAW --- UT / RT ???

Check whether material required pre-heating

Make sure the process which you followed is correct (example grinding should be done after completion of single pass, etc)

On Fri, Sep 19, 2008 at 9:42 PM, PREM SHANKARDUTT NAUTIYAL <prem_nautiyal@rediffmail.com > wrote:

 
Dear Friends

We are presently using FCAW process(E71T-1) for welding SA516Gr.70 material in 3G and 1G. The joint calls for 100% RT and UT. The thickness is 70mm with double V.
But everytime we get repair in the weld like slag, LOF,porosities..

So my basic question is can FCAW be used to weld RT and UT joints??
If yes what is the correct procedure / precautions to be followed..

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

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