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.
What is the legal age to rent a hotel room in pa? All hotels have their own set of rules, its not the LAW that you have to be a certain age, but most hotels choose between 18 and 21 when you can start to rent a room. 6 people found this useful.