hi guys!
i have a broken fixture that i am trying to replace on the boiler here and i was told that the previous technician might have welded it to the boiler before.
i don’t have a lot of experience with welding, but the fixture that i circled red on the first picture doesn’t look welded to me?? i can see a visible gap, unlike with other fixtures it does seems welded? what do you think?

i cant unscrew the fixture tho because it keeps deforming but i think it has to do with it being broken, and i have to try to use a different kind of wrench