Re: [MW:25651] Comparison for FCAW & GMAW

Sir 

It is possible that if you use Pulsed MIG for Root Run only and Subsequent Run by FCAW Process for this Projects. 

G. K. Banerjee.

NAGPUR.

On Wed, Nov 2, 2016 at 2:38 AM, Hemant W Joshi <hwjoshi@tce.co.in> wrote:

The issue of using IS 2062 plate for the pipes as has being enquired rihghty so by mr. Nautiyal remains unanswered. Can we get an idea about it?

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Lakshman Kumar. B
Sent: Thursday, October 27, 2016 1:47 PM
To: materials-welding@googlegroups.com
Subject: RE: [MW:25615] Comparison for FCAW & GMAW

 

Dear Mr. Pradip And all friends…

 

Thanks a lot for sharing your valuable inputs, and really it's a great learning and good understanding also….

 

Further I would like to bring to your notice for the following key parameters…

(please see the images also and pls be informed that it is of water pipe line and cant able to correlate with Oil & Gas Cross country pipe lines) the following limitations we have …

 

1.       Pipe are not in exact round shape and most of the time pipes internal will be supported by spider pipes (bracings) to retain its shape, however those will be removed during execution time. Here 120 Inch dia (3000Mtr dia) with a thickness of 16/18 mm – D/T is almost 190…

 

Hence internal / external fitup clamps are not possible.

Edge preparation at site is not feasible, and we have a limitation to restrict to factory made bevel or bevel preparation by free hand ( not that much accurate)

 

 

2.       Pipe will be laid in the trench one after one – (like as O&G it is not welded outside the trench and lowering the pipe line with side booms) – after completing one pipe welding another pipe will be laid and will continue further…

3.       Hence pipe are directly laying in the trench, we didn't have much clearance under the pipe

 

Hence big weld heads are not possible to use.

We can't able to go for full automation like as CRC Evans and all (earlier I worked in Reliance and in CRC welding)

 

4.       Like as O&G – alignments are not too much straight, and didn't have free ROU clearances –

O&G lines has to laid far from villages and dense areas, where as Water lines have to laid near to villages and cities by connecting all the areas.

Like as in O&G or for full automation – we can't provide the clear work front.

 

Water lines have the above limitations and so only we should be particular about the process…

Any way I understood Any of  the process can be implemented.

 

Thanks & Regards,

Lakshman Kumar B,

+91 9440031459.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of pgoswami
Sent: Thursday, October 27, 2016 9:11 AM
To: materials-welding@googlegroups.com
Subject: RE: [MW:25612] Comparison for FCAW & GMAW

 

Hi Lakhsman,

 

Both the processes are popular choices for pipeline welding. Mechanization  is the key. In general controlled surface transfer process e.g. STT or RMD are very conveniently used for long pipeline welding projects to cut down the production time and defect rates.

 

The attached documents provide some insights to such projects. Use the info at your discretion.

 

Thanks.

 

 

 

Pradip Goswami, P.Eng,IWE
 Welding & Metallurgical Engineering Specialist ,

ca.linkedin.com/pub/pradip-goswami/5/985/299

pgoswami@quickclic.net

pradip.goswami@gmail.com

 

---

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Lakshman Kumar. B
Sent: Wednesday, October 26, 2016 2:26 PM
To: materials-welding@googlegroups.com
Subject: RE: [MW:25609] Comparison for FCAW & GMAW

 

Hi Mr. Neilash Kumar,

 

It is 120 Inch (3000Mm Dia) with 20 mm thick for a water transmission project.

 

Thanks & Regards,

Lakshman Kumar B,

+91 9440031459.

 

From: 'Neilashkumar' via Materials & Welding [mailto:materials-welding@googlegroups.com]
Sent: Wednesday, October 26, 2016 4:26 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:25605] Comparison for FCAW & GMAW

 

Dear Lakshman,

 

Can you please tell us the size of the pipe and thickness in order to choose the suitable weld process? It's like need to be automated in terms of orbital type.

 

I will be able to give more input on hearing the above queries .

P.NEILASHKUMAR 

Sent from my iPad

MOB : 966 551094590

             +91 9952110791

On 26-Oct-2016, at 7:26 AM, Lakshman Kumar. B <lakshmankumar4@gmail.com> wrote:

Hi friends,

 

We have a big pipe line job in water segment.

We are planning to implement FCAW or GMAW technique to expedite the welding activity…

Please suggest me that which technique is most favorable for IS2062 material (equivalent to Pno 1) at site for 5G or 6G position…..

Your detail explanation will be more helpful on selecting the process….

Also in terms of cost – which will be economical for the project ….

 

Thanks & Regards,

Lakshman Kumar B,

Project Manager.

 

Navayuga Engineering Company LTD

Corp Off: Plot no 379, Road No 10,

Jubileehills, Hyderabad.500033 India.

Tel -  +91 -40-2333 9990/91/92 – Ext 398

Fax: +91-40-2333 7789

Mob - +91 9440031459.

Email –lakshmankumarb@navayuga.com

http://www.necltd.com/

<image001.jpg>

 

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