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ehderube (Mechanical) (OP)
9 May 05 9:15

I was wondering if anyone has any information regarding back gouging and when it is required.  We have just welded a 3" plate with a backing strip (bevel prep.), removed the backing strip and now are wondering if the side that the backing strip was on should be back gouged and welded?

HgTX (Civil/Environmental)
9 May 05 12:03
What code are you working to?  What's the loading condition of the joint?


Eng-Tips guidelines:  FAQ731-376

Helpful Member!  metengr (Materials)
9 May 05 12:50
If you want to assure a full penetration weld joint, I would strongly recommend to back gouge (grind) and add weld metal, as required.
Helpful Member!  valero (Mechanical)
9 May 05 13:15
Also to add to metengr's reply if you are working to ASME 8 your joint efficiencies will be less if you remove the backing strip and do not grind / gouge to sound metal and weld out. You would also want to perform a dye penetrant, or mag particle inspection after grinding / gouging to inspect the root pass it is not required by code but is good practice.

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