Hood1,
It sounds like you are designing for the supports.
If your 60" pipe is designed to certain standards (i.e. BS, ASTM, etc.), the standards will tell you the approximate weight it should be. If it is special made, then the pipe manufacturer will always be able to help.
Please also take into account for the weight of the internal lining (i.e. cement, epoxy lining, etc.), connection method (i.e. flanged, spligot, etc.)