Type of Sewer Pipe?

[Ebenezer Shickadance]

Can anyone advise what kind of sewer pipe I'm looking at here? I believe they are both the same material, but they're on opposite sides of a concrete enclosed elbow so I'm not sure.

It's a 4" pipe leading from the house to the septic tank. The house is 70 years old. The line seems to have been installed at some point to replace the original clay pipe. Any help is appreciated!

 

[Jeff Handy]

It could be orangeburg pipe.

Which is layers of paper and tar pressed together.

You can find lots of info on it on Google.

 

[Twowaxhack]

First pipe looks like asbestos pipe to me and the second pic it looks like cast iron.

the big hunk of concrete might be how they joined the two.

 

[Ebenezer Shickadance]

Thank you both for the replies... After some poking around today I learned that it is asbestos pipe after all.

Now comes the fun of deciding what to do next. Thanks again!