Al,
6.9 All welds shall be visually inspected. I get that part. The other part of 6.9 refers to Table 6.1 for acceptance criteria. I get that part. Table 6.1 addresses cracks, fusion, crater cross section, weld profiles, inspection time, undersized welds, undercut, and porosity. That's the part I don't get. The poster wanted to know whether plug and slot welds have the same rules for reinforcement as groove welds. No where in 6.1 does it address plug and slot welds. 6.1 (4) refers the reader to 5.24, which doesn't mention plug and slot welds, and refers the reader to 5.4 Acceptable and Unacceptable weld profiles. 5.4 addresses fillet weld and groove weld profiles in butt joints, with no mention of plug or slot welds. Groove welds are not the same as plug and welds. Look at their individual definitions in Annex K. I still say that plug and slot welds are not subject to any of this criteria unless there's an issue with a specific item, such as a crack in a plug weld, a fusion problem, undercut, or porosity that could be traced to 6.1 criteria. The same thing for manually welded studs.
By 803056
Date 03-12-2008 14:33
Edited 03-12-2008 15:03
I referred to the inspection of studs because there is no direct thread back to Table 6.1, yet the code committee responded to my inquiry that Table 6.1 is applicable to studs. As such, my take is that table 6.1 applies to "all welds" as does the profile requirements of section 5.
Is there a direct link, perhaps not, so this question should probably be addressed by the code committee if it isn't clearly addressed by D1.1.
My question took nearly two years to be resolved. I wonder how long it would take to address this issue.
As for the height of the reinforcement, I would look at the reentrant angle at the toe of the plug weld. If it is less than 90 degrees it should probably corrected so that it doesn't form a shape notched stress riser. As for the issue whether the slot and plug are groove welds or not, I consider them to be similar to a square groove with backing. As I stated before, I use the "test" that groove welds go into the joint, fillet welds go on the joint.
As is always the case, it is only my opinion. I would document my observations and let the EOR sort it out. If the plug or slot weld is stressed, he can require it to be corrected. If it isn't an issue, let sleeping dogs lie.
This is a good question! I'm not sure there is a definitive answer.
Best regards - Al