Transaction Flows between OUs: Also for POs without items and destination type = expense

Dear,

I was wondering whether the Transaction Flow feature in Inventory can be used for purchase orders that do not have items on the PO lines and whose distributions have destination type = Expense. 

In the 12.0 user guide for Inventory, from p19-38 and onwards, only examples are given that are initiated by sales orders (external or internal, based on internal requisition). I wanted to know whether a Transaction Flow of type Procuring would be usable in following scenario:

Purchase requisition in OU A > PO in OU B shipped to Inv Org A > Receipt in Inv Org A > AR invoice in OU B towards OU A & vice-versa in AP > Trade invoice is entered in OU B by matching to PO