PVC plastic is one type of pipe that does not contain iron.
Pig Iron it is called in the trade
Asbestos pipe is made of cement that contains asbestos fibers. Iron pipe is made from cast iron.
galvanize wrought iron pipe
Bi pipe is a black iron pipe.
GI Pipe is "Galvanized Iron" Pipe. These days the pipe will likely be made from steel rather than iron.
ferrite
Cast iron is not threaded, steel pipe is.
was asbestos used in production of cast iron pipe
Galvanized Iron pipe
galvanized iron pipes commonly used on water pipe lines, it is dipped into zinc for corrosion protection
It's a type of pipe
Nothing BUT ductile is much stronger