Lousy welding on the flange
That's usually the best that prison labour can do, I'm afraid. I'm sure the beatings will continue until the morale (and welding) improves.
Am I correct in assuming that that's most likely a lithium-soap based lubricating grease going into those drums?
With [2"] and  (stainless type) cast into the pipe fitting, I'm guessing some capitalist Western Pig industrial products have managed to find their way to NK?
The look on the blokes face on the left speaks volumes to me. He's sweating and thinking ...
"Sh!t, I hope this jerry-built batch of industrial plumbing keeps working while Glorious Leader is watching! If it breaks down while he's watching, it's 30 years in a gulag for me!!"