There is only one file type that uses the .XFLOW extension:
FlowExchange Data File
Data file created in the FlowExchange format, which is used to transfer material stream data between CAPE-OPEN compliant flowsheet simulators; stores flowsheet material stream data and physical properties.
NOTE: You can save XFLOW files with the XFlowSaver unit operation and load XFLOW files with the XFlowLoader unit operation.
Updated: May 11, 2015