ABSTRACT
Adequate knowledge and information of flow rates of various process streams plays a very important role in any chemical process industry, specifically when flow rate directly affects the purity of product and plant efficiency. Orifice meters are the most common type of meters used for flow measurement by various industries. Even though these meters have large pressure drop/losses and hence correspondingly large pumping cost, they are very simple in construction with no moving parts and are easy to install and replace. They are less costly compare to other devices and can be used for wide range of fluid flow rates. They can be used for flow measurement of gases, liquids, and slurries and can be operated at extreme operating conditions.
