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.
The minimum age to get into any club is 18, however, some clubs have an 'over 21' policy. It is a good idea to carry ID (identification) with you that proves your age, particularly if you look younger than 21 years old. Hotel Senior Â· 5 years ago. 1. Thumbs up.