RE: [MW:26615] WQT- Electrode

Hi Shankar,

 

Both 6010 & 7010, are cellulosic electrodes, i.e. non low hydrogen type. Complete welding by Non-Hydrogen electrodes may not be technically right.  7018 is a good choice for filler passes, however is not the best electrode for vertical down position, which pipe liners  prefer due to  higher welding speed and lesser volume of generated  slag.  Vertical down pipeline electrodes are traditionally deemed as Cellulosic electrodes.

 

However basic pipeline electrodes of high integrity  are also available  these days, which are as competitive as E-7018/7018-1 electrodes. Attached is some information on some products from Bohler.

 

A point to note  7018/7018-1 had been the backbone of all varieties of C-Mn steels, availability & quality should not be a concern.

 

I would think a technical rationale based discussion with plant contractor would be effective.

 

Thanks.

 

 

P.Goswami.P.Eng, IWE.

Welding & Metallurgical Specialist

Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/

Email:pgoswami@quickclic.net,pradip.goswami@gmail.com

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ammar Shaikh
Sent: June 16, 2017 11:14 AM
To: materials-welding@googlegroups.com
Cc: SHANKAR SHIVARATRI <sshankarirs@gmail.com>
Subject: Re: [MW:26614] WQT- Electrode

 

7018 or 7010 Should be defined by WPS and validated by PQR.

 

On Tue, Jun 13, 2017 at 12:44 PM, Shankar S <sshankar.irs@gmail.com> wrote:

Dear experts,

 

At one particular LPG bottling plant contractor proposed  WQT approval root run as E6010 and fill as E7010.  I have doubt that E7018 is suppose use for fill up only. 

 

Project: Pipeline. Pipe specification PSL2( API)-  Oil & Gas. Ref. standards: API 1104, ASME B 31.4/8.

 

Please suggest accordingly.

 

Thanks in Advance.

 

regards,

Shankar

Hyderabad India.

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