Ok, so long story short.
The building i take care of recently converted existing condenser water piping to chill water piping, and the fiberglass insulation was never upgraded.
The insulation on the "new" chill water piping is only 1" thick, however all of the joints were hit with CP-34 to provide a vapor barrier. So here is the issue. We've noticed lately that quite a bit of the pipe insulation is saturated with water. I'm pretty confident that we dont have a leak so i'm thinking the 1" wall on the pipe cover just isnt up to the job.
So what should the minimum wall thickness be on chill water piping?