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ragujet
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Join Date: Jul 2013
Posts: 4

Welding Question

08/10/2013 11:10 PM

hi friends,

i need to mig weld mild steel 20mm-20mm T joint and corner joint (both sigle v groove)

please guide me with optimal groove angle, root opening, root face sizes

thanks...
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lyn
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Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: welding question

08/10/2013 11:31 PM

Per AWS specs.

Do you know what AWS is?

Are you a welder?

Are you a manager?

An estimator?

What country?
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ragujet
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Join Date: Jul 2013
Posts: 4
#2
In reply to #1

Re: welding question

08/11/2013 12:07 AM

hi lyn iam a DIY welding beginer from india
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lyn
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#3
In reply to #2

Re: welding question

08/11/2013 12:12 AM

INDIAN STANDARDS (BIS) ON WELDING - The Indian Institute of ...

STANDARDS FOR WELDING (ISO)

Indian Standard Code of Practice for Design, Fabrication, and ...
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
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#4

Re: welding question

08/11/2013 2:46 AM

A V-groove (or J-groove) configuration is usually for a butt weld, not for a T or corner weld. As far as I know, T's and corners just use 90° angles, though other angles would be possible.

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Original_Macgyver
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Join Date: Jul 2013
Location: Lost Wages Nevada
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#5

Re: Welding Question

08/11/2013 10:40 PM

You're taking on a very ambitious project of welding such thick material. How long have you been welding as a novice? Have you ever dealt with this type of weld before on thinner materials? This thicker material leads me to believe that there is going to be a lot of pressure or force working against this weld. I've seen even a certified welder with years of experience fail a weld inspection on the same material. Be very careful. You are responsible for the safety of this device you're welding.

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fixitorelse
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Join Date: Aug 2010
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#6
In reply to #5

Re: Welding Question

08/12/2013 4:31 AM

20mm is not thick, 200mm is getting thick.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#7
In reply to #6

Re: Welding Question

08/12/2013 10:46 AM

OK. How about asking the Structural Engineer responsible for designing the thing? After all, it should be on the "for construction" drawing issued to the Welder; if it isn't, get the Engineer to add it to the drawing on a later "for construction" revision.

If it isn't, walk away from the job and the liability that comes with any failure of the weld in service.

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Original_Macgyver
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#8
In reply to #6

Re: Welding Question

08/12/2013 2:24 PM

For a DIY welder...

  1. He shouldn't be welding anything over 8 mm thick.
  2. I have to believe that if he is a DIY welder, his machine isn't rated for anything thicker than 10 mm thick.
  3. If he has to ask about bevels and root openings, look out!!
  4. If this welder doesn't have the common sense to look it up on google then he shouldn't be welding anything!!
  5. Yes 200 mm is thick, however for this poster, 20 mm is too thick!!
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geraldpaxton
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#9

Re: Welding Question

08/13/2013 5:10 PM

Not sure of size of your mig unit, or the precision required for the job but I would suggest a deep enough groove to get 100% penetration and then secondary passes on alternating sides to fill the grove to the profile required, then ultrasound or x-ray testing, grind out the flaws and re-weld. Sign up for welding-advisors.com newsletter.
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Users who posted comments:

fixitorelse (1); geraldpaxton (1); lyn (2); Original_Macgyver (2); PWSlack (1); ragujet (1); Tornado (1)

Previous in Forum: Masa Dosing and Mixing Plant Type: HM 1500/2250   Next in Forum: Anyone Else Used Earth Coupled Loops for Process Cooling? What Size?

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