Re: [MW:18779] Multiple process GTAW+SMAW Process,

Dear Mr.Sridhar ,

Thank you for your details .

As ASME II C, SFA 5.1, Table 1 and I referred other major welding consumable manufacturer's catalogues ,  E7018 is not recommended for DCEN ( Straight Polarity ), so practically you might have achieved with DCEN for E7018 on pipes with full penetration.

Have you tested any tensile, bend tests in PQR with the same technique you have mentioned in your mail .

If it is OK, then I would check in my shop too.

Regards,

Saravanan.

On Thu, Sep 26, 2013 at 7:19 PM, c sridhar <sridhar305@yahoo.com> wrote:

There is  no doubt about  penetration(medium)  level with E 7018 & E 7016 type electrodes compared to E 6010.

But what I have said is " E 7018 gives full penetration  with DC EP & both E 7018 & E 7016 electrodes give deep

penetration with DC SP " and could be used for root application.

The penetration depth  is  comparable to welds made with E 6010 using  DC RP.

Filler & Cap passes to be done with DC RP.

Sridhar.

 

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From: kannayeram gnanapandithan <kgpandithan@gmail.com>
To: materials-welding <materials-welding@googlegroups.com>
Sent: Thursday, 26 September 2013 10:55 AM
Subject: Re: [MW:18770] Multiple process GTAW+SMAW Process,

7016&7018 will give medium penetration unlike 6010 which gives deep penetration

On Tue, Sep 24, 2013 at 11:17 PM, c sridhar <sridhar305@yahoo.com> wrote:

E7018 type electrodes give radiographic quality  full penetration welds on single 'v' groove butt joints with DC EP .

Both E 7016 & E 7018 type electrodes give deep  and full penetration welds with DC EN  (like in E 6010) and filler
passes to be continued with DCEP.

Both techniques were adopted successfully in pipe line joints.

sridhar.

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From: "george.dilintas@gr.bureauveritas.com" <george.dilintas@gr.bureauveritas.com>
To: materials-welding@googlegroups.com
Sent: Wednesday, 18 September 2013 12:53 PM
Subject: Re: [MW:18690] Multiple process GTAW+SMAW Process,

If you want to involve only SMAW then E-6010 is the only option for the root pass.
For filling you could continue with E-7018

rudolf saldanha ---17/09/2013 10:30:00---hI, Saravanan,  

From: rudolf saldanha <rudolf_jude@yahoo.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: 17/09/2013 10:30
Subject: Re: [MW:18673] Multiple process GTAW+SMAW Process,
Sent by: materials-welding@googlegroups.com

---

hI, Saravanan,
 
May I know if it is mandatory by code that back gouging has to be done when we have a Full Penetration Joint using only SMAW process.
As far as I know, backing and back gouging are supplementary essentials for SMAW process.
 
To get a full penetration it is not compulsory to go for GTAW + SMAW process, but we can still do it with SMAW only.
 
We can use LB52U which also belongs to SFA 5.1 just as E7018, and it is commonly used for welding on pipelines where welding is done on one side.
 
http://www.weldingsupply.com.au/index.php/kobe-lb52u-low-hydrogen.html
 
The above link may be of help.
 
Please correct me if I am wrong.
 
Thanks and regards
Rudolf
 
 
 

From: Saravanan Sornam <saravanshyla@gmail.com>
To: materials-welding@googlegroups.com
Sent: Tuesday, 17 September 2013, 14:05
Subject: Re: [MW:18670] Multiple process GTAW+SMAW Process,

Hi San ,

I said that , only SMAW on the Inaccessible Pipe size, for example 6 ", cannot be welded and even you cannot get Full Penetration using E7018 only on Single V Bevel.

It should be welded only by using GTAW for Root and subsequent welds by SMAW until Cap.

Regards,
Saravanan,
Korea


On Mon, Sep 16, 2013 at 7:32 PM, jaffar ali riyas mohamed nizamin <jaffarqc1987@gmail.com> wrote:
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