If you have been welding since '96 you should atleast know 7018 needs clean surfaces. You should also know how to mitigate warping plates, like a temporary gusset or running 3/32 or 1/8 rod to lower heat input, or anchoring it to what it is sitting on.
You should also know that same heat destroys the concrete you just welded on. For a dirty pipe and a dirty plate it looks okish. I would rather weld low H rod outside than through dirty shit and call it a cover pass which means your 6010 root looks like garbage, because of that was a structural weld your plate with a 3/4" gap between the bearing surface and your 4" pipe means 7/8s of that bearing structure is useless; shouldve used 2x2x1/8 angle for that much support. It looks like shit. Welds look meh..