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How Does an Orifice Flange Work?

How Does an Orifice Flange Work?

In the realm of fluid dynamics and pipeline systems, precise control over flow rates is crucial. Orifice flanges emerge as a key component in achieving this control, playing a vital role in regulating and measuring fluid flow. Let’s delve deeper into the workings of orifice flanges and how they contribute to the efficiency of piping systems.

What are Orifice Flanges?

An orifice flange is a specific type of flange designed to create a restriction or a differential pressure in a pipeline. It consists of a metal disc, known as the orifice plate, which contains a precisely measured hole (the orifice) at its center. This orifice plate is placed between two flanges in a pipeline, often held in position by bolts, and its function is to control the rate of flow by causing a pressure drop.

How Do Orifice Flanges Work?

1. Flow Regulation: When fluid passes through the orifice, the size of the hole creates a constriction in the flow path. This constriction leads to an increase in fluid velocity as it passes through the smaller area of the orifice.

2. Pressure Drop: According to Bernoulli’s principle, an increase in fluid velocity leads to a decrease in pressure. As the fluid accelerates through the orifice, the pressure drops, creating a differential pressure between the upstream and downstream sides of the orifice plate.

3. Measuring Flow Rates: The differential pressure created by the orifice plate is proportional to the flow rate of the fluid passing through it. By measuring this pressure difference, often with the help of pressure sensors or gauges installed upstream and downstream of the orifice, engineers can accurately determine the flow rate.

Key Components and Variations:

  • Orifice Plate: The heart of the orifice flange, the orifice plate, comes in various shapes and sizes with differently shaped orifices (circular, square, etc.), depending on the specific requirements of the application.
  • Flange Assembly: Orifice flanges consist of a pair of flanges, between which the orifice plate is installed. These flanges are connected by bolts and nuts, ensuring a secure and sealed connection.

Applications of Orifice Flanges:

1. Flow Measurement: Orifice flanges are widely used in industries such as oil and gas, chemical processing, and water treatment for accurate measurement of fluid flow rates.

2. Pressure Regulation: They are also employed to control and regulate pressure within pipelines by inducing a specific pressure drop.

3. Process Control: Orifice flanges play a crucial role in maintaining and optimizing the efficiency of various processes by precisely controlling flow rates.


Orifice Flanges serve as indispensable tools in the realm of fluid dynamics and pipeline systems, enabling accurate flow measurement and control. Their precise design and functionality aid in regulating flow rates, measuring differential pressure, and ensuring optimal performance across a spectrum of industries. By harnessing the principles of fluid mechanics, orifice flanges contribute significantly to the reliability, efficiency, and safety of diverse piping systems, making them a cornerstone in modern engineering practices.

Bhansali Metalloys Inc is one of the leading Manufacturer, Exporters, and Suppliers of High Quality Orifice Flanges  all over in India. We are Manufacturer, Supplier and Dealer of various types of Flanges such as Slip-On Flanges, Blind Flanges, Weld Neck Flanges, Lap Joint Flanges, Socket Weld Flanges, Orifice Flanges, Threaded Flanges and many more. We are Orifice Flanges Manufacturer in India. These Flanges are available in different grades and materials. We are Orifice Flanges Manufacturer, Supplier, Dealer, and Exporter in India. We are Orifice Flanges Supplier in India. Contact Us +919152160158 or email to for Orifice Flanges price list.

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Each Stainless Steel Lap Joint Flange is otherwise designed based on the characteristics of the applying and additionally the pressure. Consequently, different industries use different Square Pipes. We also produce customized Orifice Flanges Products at our factory as per our client’s requirements. For any types of Orifice Flanges Price List Call on +91 9152160158 or drop an Email to |

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