FCAW Process for welding of tanks

[N VENKATESWARA PRASAD]

Dear All,
 
We are planning to introduce Flux cored Arc welding for L seams and C seam welding of Tanks.  The Tank dia is 12m and material is ASTM A 515 Gr. 60.  We are planning to use E 71T1 flux cored wires.  FCAW was never used for welding my cleint jobs.  So he is asking history on usage FCAW wires for Tanks, repair percentage, bead apperance and any other adavantages.  If  you have FCAW wire please send me the above details and also photos of  some weld joints also.
 
Regards
 
N.V. PRASAD

[Muhammed Ibrahim PK]

Hi,

 

Be care ful when doing FCAW. Porosity and Lack of fusion is the major issue if the welder is not properly trained. It is recommended for stuctural. If you check the hardness also the weldmetal will show more than 200 BHN.

Thanks & Regards
Muhammed Ibrahim PK

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[pgoswami]

Hi Mr. Prasad,

 

FCAW could be an ideal welding process for the  thickness you have mentioned. However one has to be very careful about the individual performances of specific brands. Within the same AWS specifications, filler metals from two manufacturers may not produce equal performance. You may have to screen the filler properly, upon discussion with manufacturers, qualify procedure, train and qualify the welders. In addition incorporating additional NDE over and above the design code would be a good idea.

 

Pradip Goswami,P.Eng.

Welding & Metallurgical Engineer/Specialist

Ontario Power Generation Inc.

Email-pgoswami@sympatico.ca,

pgos...@quickclic.net

 

---

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Muhammed Ibrahim PK
Sent: Sunday, June 20, 2010 9:41 AM
To: material...@googlegroups.com
Subject: Re: [MW:5669] FCAW Process for welding of tanks

[hpi001]

Dear Mr. Prasad,

I agree with Mr. Pradip Goswani regarding mechanical properties of
FCAW wires. I have some experience with FCAW wires of the same AWS
classification, welded under the same conditions but showing complete
different mechanical properties afterwards, especially under fatigue
circumstances.
The fatigue strength of similar FCAW wires differs very much compared
to solid wires.
I suppose your tank with a diameter of 12 meters will be a kind of
storage tank and therefore will not undergo any cyclic load so fatigue
will not be an issue, if fatigue can be an issue than please take this
into account.

Best Regards,

Herman Pieper

On 20 jun, 23:16, "pgoswami" <pgosw...@quickclic.net> wrote:
> Hi Mr. Prasad,
>
> FCAW could be an ideal welding process for the  thickness you have
> mentioned. However one has to be very careful about the individual
> performances of specific brands. Within the same AWS specifications, filler
> metals from two manufacturers may not produce equal performance. You may
> have to screen the filler properly, upon discussion with manufacturers,
> qualify procedure, train and qualify the welders. In addition incorporating
> additional NDE over and above the design code would be a good idea.
>
> Pradip Goswami,P.Eng.
> Welding & Metallurgical Engineer/Specialist
> Ontario Power Generation Inc.

> Email-pgosw...@sympatico.ca <mailto:sympatico.capgosw...@quickclic.net> ,
> pgosw...@quickclic.net