pipe
IF it is 60 psi, then it is not concrete, rather Transite asbestos pipe. The only transition that will work is a Dresser type, (Baker, Dresser, etc.), with the proper reducing gaskets on both sides. You will have to know the approximate o.d. of the transite because the o.d. varied according to the pipe's class, so that the proper gaskets and coupling will be furnished.