My new mistress

I'm trying not to be overly critical here, especially since you may not do this for a living.

Near the top of your photo it appears the new piping is three inch that feeds the steam main. It looks like you used a three by two inch concentric coupling to reduce the size (this will cause a dam) and then you fed the existing (painted red or brown) and used a what looks like a two and a half by two inch bushing. I realize that not every supply house carries every fitting known to man, but I think you may have some issues with the dam and the slightly undersized pipe (two inch section).

Can you see how steam/condensate would want to lay in that roughly 3" x 6" horizontal nipple that reduces down inside that coupling? Can you see how the 2" pipe that comes out of that same coupling may not provide the same flow as the dead men calculated for the roughly 100 year old 2.5" piping (painted) that feeds your two 2" steam mains?

To be honest, it may work fine and not hammer or provide wet steam. Everything certainly look plumb and straight. I am not trying to pick on your work, despite the fact that I've been in the heating business for over thirty years, our work is not always perfect either.

I’m nobody but I’d bet no water is going to pool there.

But yeah I’d rather see the riser be 2” or whatever size the main is