{"id":573,"date":"2026-02-28T16:57:51","date_gmt":"2026-02-28T11:27:51","guid":{"rendered":"https:\/\/www.absteel.in\/blog\/?p=573"},"modified":"2026-02-24T17:06:34","modified_gmt":"2026-02-24T11:36:34","slug":"orifice-flange-types-a-complete-guide","status":"publish","type":"post","link":"https:\/\/www.absteel.in\/blog\/orifice-flange-types-a-complete-guide\/","title":{"rendered":"Orifice Flange Types: A Complete Guide"},"content":{"rendered":"<div class=\"ttr_start\"><\/div>\n<p>Orifice flanges are important parts in pipeline flow measurement systems. They are designed to hold an orifice plate in place and allow accurate monitoring of fluid movement. These <strong>flow measurement flanges<\/strong> are used in oil &amp; gas, petrochemical plants, power generation units, water treatment facilities, and other process industries. Reliable flow data directly impacts operational efficiency, process stability, and plant safety. That is why industries rely on dependable <strong>orifice flange manufacturers<\/strong> who understand the importance of precision and performance across different <strong>orifice flange types<\/strong>.<\/p>\n\n\n\n<p>Orifice flanges are manufactured in accordance with international standards such as ASME B16.36 and ASME B16.5 to ensure dimensional accuracy and pressure integrity. They are available in many materials like carbon steel, stainless steel, duplex steel, and alloy steel grades to suit varying service conditions. These flanges are produced in multiple pressure classes such as 150#, 300#, 600#, 900#, 1500#, and 2500#, covering both moderate and high-pressure applications. Understanding the different types of orifice flanges and their specifications helps buyers select the correct solution for their specific piping system requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What is an Orifice Flange?<\/h2>\n\n\n\n<p>An <a href=\"https:\/\/www.absteel.in\/ansi-asme-b16.5-orifice-flanges-manufacturer-exporter.html\"><strong>orifice flange<\/strong><\/a> is a disc-type flange designed to be used along with an orifice plate to measure the flow rate of liquid or gas passing through the pipe. An orifice plate is a thin, metal disc with a precisely machined hole (orifice), which is placed between two flanges to form an orifice flange. The small hole in the orifice plate forces the liquid or gas to squeeze through it, thus reducing its pressure. Usually, two pressure tap holes, that are drilled and threaded, are placed before and after the orifice plate to connect differential pressure instruments. These instruments calculate the differential pressure by reading the pressure before and after the gas or liquid passes through the orifice plate. Orifice flanges are typically supplied in pairs with jack screws for easy plate removal. These flanges are manufactured to the ASME B16.36 standard and are available in all ASTM forged grades like A105, A182 F304, F316, F51, etc.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Orifice Flanges Types<\/h2>\n\n\n\n<p>There are 4 types of orifice flanges based on several factors like their design, installation method, pressure requirements, and the specific application needs in piping systems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Weld Neck Orifice Flange<\/h3>\n\n\n\n<p>This type is the most commonly used. It consists of a long tapered hub that smoothly transfers the stress from the flange to the pipe. This reduces the risk of failure, fatigue or cracking at the weld joint. A weld neck orifice flange is crucial in the high-pressure oil &amp; gas industry and refineries.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Slip-On Orifice Flange<\/h3>\n\n\n\n<p>This type of flange has a slightly larger bore than the pipe, so it slides over the pipe and is then welded. This means easy alignment and installation. As these flanges don&#8217;t provide stress distribution properties like weld neck flanges they are suitable for low to moderate pressure systems. This flange is a cost-effective option compared to weld neck flanges.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Threaded Orifice Flange<\/h3>\n\n\n\n<p>This flange has internal screw threads (like NPT or BSP) that match the external threads on the pipe. This type is simply screwed onto the pipe. It is commonly used in small-diameter or non-weld applications and low-pressure pipelines. Threaded flanges find common applications in water and utility services.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Socket Weld Orifice Flange<\/h3>\n\n\n\n<p>In this type, the pipe is inserted into a socket on the flange and then welded on the outside. These are small-diameter pipes that operate at a relatively high strength. This design provides strong and leak-resistant joints. As they combine high strength and a compact size, they are commonly used in chemical plants, hydraulic systems, and high-pressure instrumentation lines.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Materials Used in Orifice Flanges<\/h2>\n\n\n\n<p>Orifice flanges can be made from many materials to fit different applications and service conditions. These include grades under ASTM A105, ASTM A182 F304, F316, F316K, duplex and super duplex grades and alloy steel grades F11, F22, and F91. These materials are chosen based on their corrosion resistance, mechanical strength, and temperature suitability. This ensures reliable performance in different demanding industries.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Choose AB Steel for Orifice Flanges?<\/h2>\n\n\n\n<p>Every orifice flange we supply at AB Steel comes with practical manufacturing experience. As a dedicated manufacturer and supplier we understand that flow measurement parts need to be consistent and perform well, even in tough environments. Our orifice flanges are made according to international standards like ASME B16.36, ASTM, and ANSI. We also offer a complete range of pressure classes and material grades to ensure our products can operate across a wide range of conditions in the oil and gas, chemical, power, and utility sectors. Our machining processes focus on accurately tapping and drilling pressure ports to achieve accurate differential pressure readings. Before they are sent out, each flange goes through a strict quality check that includes PMI testing, hydro testing, and detailed dimensional checks.&nbsp; We also support custom requirements, like non-standard sizes and special surface coatings, to meet the needs of each project. We are just as committed to serving both domestic and export markets with competitive prices and reliable delivery schedules.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>Selecting the right orifice flange type is important for ensuring accurate flow measurement, long-term reliability, and overall system safety. As these flanges directly influence differential pressure readings and process control, choosing the correct design, material, and pressure class makes a measurable difference in plant performance. With a strong focus on quality and compliance, AB Steel stands as a dependable partner for high-quality industrial orifice flanges. For technical assistance, pricing details or bulk order inquiries, our team is always ready to support your requirements.<\/p>\n<div class=\"ttr_end\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Orifice flanges are important parts in pipeline flow measurement systems. They are designed to hold an orifice plate in place and allow accurate monitoring of fluid movement. These flow measurement flanges are used in oil &amp; gas, petrochemical plants, power generation units, water treatment facilities, and other process industries. Reliable flow data directly impacts operational &#8230; <a title=\"Orifice Flange Types: A Complete Guide\" class=\"read-more\" href=\"https:\/\/www.absteel.in\/blog\/orifice-flange-types-a-complete-guide\/\" aria-label=\"More on Orifice Flange Types: A Complete Guide\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":574,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-573","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-flanges-blogs"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Orifice Flange Types: A Complete Guide -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.absteel.in\/blog\/orifice-flange-types-a-complete-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Orifice Flange Types: A Complete Guide -\" \/>\n<meta property=\"og:description\" content=\"Orifice flanges are important parts in pipeline flow measurement systems. 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