The image below is a schematic flow diagram of a typical oil refinery that depicts the various unit processes and the flow of intermediate product streams that occurs between the inlet crude oil feedstock and the final end products.
In order to check-in into a hotel, the person must be 21 years old.  If the person is younger than 21, then a parent or guardian can  give permission for them to check-in. 1 person found this useful.
Those walking into a hotel with a 21 age limit might test the policy. Hotels might be willing to rent to 19- and 20-year olds if you have the identification and driverâs license. Itâs not illegal to rent to you, so their policy becomes a matter of preference and circumstance.hose walking into a hotel with a 21 age limit might test the policy. Hotels might be willing to rent to 19- and 20-year olds if you have the identification and driverâs license. Itâs not illegal to rent to you, so their policy becomes a matter of preference and circumstance.