What schedule 10 ,20, 40, 80, 120????
The wall thickness of 4" Sch 40 pipe is 0.237 inches.The outer diameter is 4.5 inches and the inner diameter is 4.026 inches.
Bi pipe is a black iron pipe.
Black pipe is an amateur term for common steel or iron pipe.
Black iron pipe is used for gas installations but ONLY if the piping is indoors. Outdoor gas piping is usually done in galvanized pipe. Steam is also piped with black pipe, fire sprinkler and standpipe systems also use black pipe.
I assume you mean black iron pipe, which is used to run the gas line to your furnace.
GI Pipe is "Galvanized Iron" Pipe. These days the pipe will likely be made from steel rather than iron.
Yes, it's better pipe.
There is Black Iron pipe, made of iron. There is Cast Iron pipe, which is black in colour, made from old cars and their parts. There is black ABS plastic pipe, made of plastic. There is Utility pipe, also made from plastic.
BIP is Black Iron Pipe.
No
the wall thickness of sch 40 - 500mm dia pipe is 15mm or 16mm.
It is not possible to answer this without more information. However to find the thickness measure the external diameter, measure the internal diameter subtract the internal from the external and that will give you the thickness of the pipe