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Up Topic American Welding Society Services / Technical Standards & Publications / Full Open Corner Joint
- - By welderla (*) Date 09-22-2010 23:22
Is a full open outside corner joint prequal with D1.1?  I have two pieces of angle irons forming a 90 degree angle.  I have both of the beveled where they meet.  The angles do not over lap one another.  So is this prequalified on its own or does it fall under another prequal?  It needs to be a CJP.  I am using D1.1:2000.
Parent - - By 803056 (*****) Date 09-22-2010 23:34
Are you back gouging the root side of the first weld deposited? If so, I believe it can be considered to be a prequalified joint detail provided you can select a detail that is included in figure 3.4.

Al
Parent - - By welderla (*) Date 09-23-2010 11:17
I am unable to do a back gouge because of the length and location of the joint.
Parent - By Lawrence (*****) Date 09-23-2010 12:59
It's safe to say that if it's an open root and there is neither back gouge/backweld or a backing strip, than the WPS must be qualified per clause 4.
Parent - - By waccobird (****) Date 09-23-2010 13:15
welderla
Back Gouging can be done other ways besides carbon arc gouging.
A grinder in the right hands can accomplish the back gouging.
Good Luck
Marshall
Parent - - By welderla (*) Date 09-23-2010 13:35
That still doesn't answer my question, i have a outside corner joint, not an overlapping corner joint like the examples in d1.1 fig3.3/3.4.  The corner is mitered so it fits tight.  is this a prequalified or not and if not how do i make it a prequal without having to make a PQR?
Parent - By Lawrence (*****) Date 09-23-2010 14:11
I think you have been given an answer. You just don't like the answer  :)    

What you describe is not prequalified.

It's full pen, with no backing bar, no back gouge/backweld.. Therefore not prequalified.

A tight fit means nothing if you are still making a full pen/open root weld.

Al told you.. You can make it prequalified with backgouge/backweld or backing.
Parent - - By waccobird (****) Date 09-23-2010 14:16
welderla
According to AWS D1.1  All the prequalified Joint details for CJP either require back gouging or backing bar for prequalified ability.
So if you can not back gouging or using a backing bar then you will have to qualify the procedure.
Joint detailed in Fig. 3.3 are for PJP and Joint details for CJP are in Fig. 3.4. You will not find a joint detail in Fig. 3.4 that does not require either back gouging or backing bar except in an instance for Submerged Arc Welding are you going to use SAW as your process?
Good Luck
Marshall
Parent - By swnorris (****) Date 09-27-2010 16:34
welderla,

I agree that it's not prequalified.  If you can't get to the back side, then you can't get to it.  I might have provided the EOR with an alternate detail before beveling both pcs. where they meet.  Not to be a smart ass, but I assume that you must have known that you couldn't get to the back side before you beveled the pcs.  Sometimes, even CJP welds can be reduced to something less, especially if the back side is inaccessible.  Just curious.  How much of an open root do you have?
Up Topic American Welding Society Services / Technical Standards & Publications / Full Open Corner Joint

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