said by nunya:"Orangeberg" conduit (Fiber conduit). It's made out of paper (pulp) and pitch.
I heard at one time they used to use it for water and sewer pipe. I couldn't imagine it lasting more than a few years.
A rental I own needed some driveway drainage work done a summer or two ago, and the piping that took the driveway water out to the drainage area was Orangeburg. It was clogged and broken down and finally needed replacement (which we replaced with PVC).
But I can date it back to at least 1970 (and maybe back farther, but I can't verify that).... so that's 40+ years of service before needing to be replaced. I don't think that's bad at all for fiber pipe. I hadn't ever heard of Orangeburg until then. I thought it was kinda neat to see actually.