Introduction:Today in many industrial processes it is important to precisely measure the fluid flow rate within a system as a whole or in part. This applies to both liquids and gases (e.g. carbon dioxide, nitrogen, liquors, etc.) which are an integral part of the process, or to compress air, water or steam which are essential for the operation of the system. The installation of any flow meter can be explained in two ways. Firstly, process control where the flow meter is used to measure the flow rate of the fluid or energy flow to enable control of the process and therefore to be certain that the final product is of the required quality. The second is cost allocation when energy is used to provide process or space heating; It is essential to know where the costs associated with energy are actually incurred. The cost of energy is assigned to a particular product, department or other user through flow metering, which usually results in a significant reduction in total energy costs. The advantage of flow metering is that it can allocate heating costs. Not only that, it also improves process control, identifies key energy users, monitors the results of process changes, controls steam boiler efficiency, identifies energy patterns throughout the day, and provides management information. In today's world, orifices are still the most commonly used type of flow meter used. The main reason they are used over other flow meters is because they offer cost advantages, especially in larger line sizes, and have proven robust, reliable and effective for many years. The orifice continues to provide a very competitive solution where there is a need for a robust and economical flow meter that has a turndown of no more than 4:1... middle of paper... so a result can be very precise but imprecise. Thus, an experiment that has an accurate answer is said to be more successful than an experiment that has an accurate value but an inaccurate answer. Conclusion: To summarize, this experiment has shown that there will always be a loss in the system but the system can be made more efficient to minimize losses and thus reduce costs. The experiment carried out to determine the volumetric flow rate demonstrated experimentally and theoretically that there are some errors in the experiment when the experimental value was compared with the theoretical value. One of the most obvious possibilities for error that could have occurred during the experiment was human error. However, these errors can be reduced by repeating the experiment more than twice and, if possible, also by using better equipment.