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.
Talk0 Share. Generally speaking, you must be 18 years old with a valid ID, and many hotels require a major credit card in your name. I have heard of some exceptions, where it is difficult if not impossible to rent a hotel for a teen during spring break for example.