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ALasi
Participant

Join Date: Jun 2010
Posts: 4

Welding

06/09/2010 11:43 AM

Hi can we welding Pipe X52 to Flange PN 64 by using 7010 electrode
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metalSmiths
Guru

Join Date: Feb 2008
Location: East Tenneesse, USA
Posts: 685
Good Answers: 46
#1

Re: Welding

06/09/2010 8:53 PM

What does your engineer say?

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CNCNuckingfuts
Associate

Join Date: Jun 2010
Location: Connecticut, USA
Posts: 51
Good Answers: 8
#2

Re: Welding

06/09/2010 10:15 PM

I was able to find these notes...hope it is helpful. I would not proceed unless I had a drawing or process sheet along with specifications directly related to the process of welding the flange to the pipe from a qualified Engineer. I would assume that you will have to get an x-ray done so be sure to use the correct process or you will be looking at some considerable time loss reworking it.

EURO PIPE 7010 is an all position cellulosic electrode that is especially suited for welding high strength pipe. It produces the consistent, deep penetration required to maintain a proper keyhole when vertical down welding in open root pipe joints.

* Note: E-6010 or E-7010 electrodes shall be used for butt-welds. Also E-6010, E-7010, or E-7018 electrodes shall be used on fillet welds when welding fittings such as stoppers, no-blos, weld-o-lets, branch pipes, branch saddles, etc. Low hydrogen E-7018 electrodes shall be used on fillet welds when welding harness ears and strap restraints.

WELDBEND NOTES:

Weld neck Flanges can be joined to pipe of lesser wall with proper end preparation and joint design.

The recommendations that follow apply to weld neck flanges with standard plain end bevels (as shown above) and with a hub thickness at the bevel no greater than 1 1/2 times the mating pipe thickness.

  1. The thickness of the flange hub at the weld bevel and the pipe shall be in accordance with the design requirements of the applicable section of ASME B31 Code for Pressure Piping.
  2. When the internal offset due to unequal thickness does not exceed 1/2 times the pipe wall thickness, then the rules and figures given on page 75 are recommended as well for joining weld neck flanges to pipe of lesser wall and/or higher strength.
  3. When the additional thickness of the hub at the bevel results in an offset at the outside diameters of the ends to be joined, reference should be made to ASME B31 and ASME B16.5
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ashfaqanwer
Commentator
Engineering Fields - Piping Design Engineering - New Member

Join Date: Apr 2010
Posts: 66
Good Answers: 1
#3

Re: Welding

06/10/2010 3:01 AM

If the flange is also in carbon steel you can surely use E7010 electrodes for welding. Its good if you perform the root pass with E6010.

Regards,

Ashfaq Anwer

http://thepetrostreet.com
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ALasi
Participant

Join Date: Jun 2010
Posts: 4
#4
In reply to #3

Re: Welding

06/10/2010 2:09 PM

thank you M.r Ashfaq yes this flange carbon steel. Is there any slandered say that we can weld by use E-7010
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ashfaqanwer
Commentator
Engineering Fields - Piping Design Engineering - New Member

Join Date: Apr 2010
Posts: 66
Good Answers: 1
#5
In reply to #4

Re: Welding

06/10/2010 2:22 PM

You would not be finding any specific standard describing about the use of E-710 for X52 piping but surely you can look into the characteristics and use of E-7010 in AWS or ASME Sec. II part C. This is good for root pass due to deep penetration. However, for filling / capping you may use E-7018.

Go for it.

Regards,

Ashfaq Anwer

http://thepetrostreet.com
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PMoon
Power-User
Hobbies - Target Shooting - New Member

Join Date: Feb 2010
Location: Florida
Posts: 259
Good Answers: 29
#6

Re: Welding

06/10/2010 4:15 PM

You need a Weld Procedure Specification (WPS) for the base materials, joint geometry, and filler metals you intend to use. Welding without a WPS or qualified welders is not acceptable under any conditions for anything or any reason.

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Users who posted comments:

ALasi (1); ashfaqanwer (2); CNCNuckingfuts (1); metalSmiths (1); PMoon (1)

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