{"id":570,"date":"2026-02-26T16:52:37","date_gmt":"2026-02-26T11:22:37","guid":{"rendered":"https:\/\/www.absteel.in\/blog\/?p=570"},"modified":"2026-02-24T16:57:42","modified_gmt":"2026-02-24T11:27:42","slug":"what-is-an-orifice-flange-a-detailed-guide-for-engineers-and-buyers","status":"publish","type":"post","link":"https:\/\/www.absteel.in\/blog\/what-is-an-orifice-flange-a-detailed-guide-for-engineers-and-buyers\/","title":{"rendered":"What is an Orifice Flange? A Detailed Guide for Engineers and Buyers"},"content":{"rendered":"
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Measuring flow in a pipeline is a vital task for any industrial setup. It is very important in sectors like oil and gas, petrochemicals, and power plants. Water treatment and chemical processing also rely on these measurements. Accurate flow monitoring ensures the plant runs well. It keeps the site safe and helps control high costs. The orifice flange is a central part of differential pressure flow systems used today.<\/p>\n\n\n\n

We design orifice flanges<\/a><\/strong> to hold an orifice plate inside a pipeline. These flanges follow international rules like ASME B16.36 and ASME B16.5. We produce them in pressure classes such as 150#, 300#, and 600#. They are also available in 900#, 1500#, and 2500# ratings. You can choose materials like carbon steel or stainless steel. Duplex steel and alloy steel are also common options for these parts.<\/p>\n\n\n\n

What is an Orifice Flange?<\/strong><\/h2>\n\n\n\n

An orifice flange is a specific type of flange. It works with an orifice plate to measure the fluid flow rate. We always install them in pairs. The orifice plate is placed between the two flanges. These flanges have built-in pressure tapping holes. These holes connect to instruments that check pressure levels.<\/p>\n\n\n\n

The working principle is quite simple. The orifice plate creates a restriction in the pipe. This restriction causes a pressure drop as fluid passes through. Engineers use this drop to calculate the flow rate of the liquid or gas. We provide jack screws with these flanges. These screws help you take the flanges apart for maintenance. They make it easy to remove the plate without damaging the pipe. Common material standards include ASTM A105 and ASTM A182 grades like F304, F316, F51, and F22.<\/p>\n\n\n\n

How Does an Orifice Flange Work?<\/strong><\/h2>\n\n\n\n

The system operates using the flow restriction principle. Fluid moves through the small hole in the orifice plate. This makes the fluid speed up. When speed increases, the pressure drops. This change is the key to the whole process.<\/p>\n\n\n\n

We use upstream and downstream pressure taps to see this change. These taps link directly to flow transmitters or manual gauges. The transmitter takes the pressure difference and turns it into a flow measurement. This data tells the buyer exactly how much fluid is moving. It is a very reliable way to track pipeline activity.<\/p>\n\n\n\n

Key Features of Orifice Flanges<\/strong><\/h2>\n\n\n\n