We use Rotating Equipment term to specify all machinery related with pumping and compressing fluids including different types of liquids and gases. Since the pumps and compressors do not exist without drives, this section is covering also electrical motors, engines, turbines. The hydroturbines, hydrogenerators and electrical generators are presented as well.

Static Equipment covers information about control valves, reactors, vessels, heat exchangers and some other equipment which is "statical" or "almost statical" during operation with different type of liquids, gases and mistures of fluids.