{"id":465,"date":"2026-01-20T12:34:28","date_gmt":"2026-01-20T07:04:28","guid":{"rendered":"https:\/\/www.piyush-steel.com\/blog\/?p=465"},"modified":"2026-01-20T12:50:46","modified_gmt":"2026-01-20T07:20:46","slug":"orifice-flange-types","status":"publish","type":"post","link":"https:\/\/www.piyush-steel.com\/blog\/orifice-flange-types\/","title":{"rendered":"Orifice Flange Types: A Comprehensive Guide for Engineers"},"content":{"rendered":"<div class=\"ttr_start\"><\/div><p data-start=\"300\" data-end=\"731\">Orifice flanges are specialized pipe flanges designed to work with <em data-start=\"367\" data-end=\"383\">orifice meters<\/em> for measuring the flow rate of liquids and gases in pipelines. Unlike standard flanges, orifice flanges are machined with pairs of pressure tappings, eliminating the need for separate pressure taps on the pipe wall. These flanges are engineered to securely hold orifice plates and provide accurate flow measurements in industrial piping systems.<\/p>\n<p data-start=\"733\" data-end=\"940\">At <strong data-start=\"736\" data-end=\"752\">Piyush Steel<\/strong>, we manufacture and supply premium quality orifice flanges in various materials, pressure classes, standards, and connection types to meet the demands of modern industrial applications.<\/p>\n<h2 data-start=\"947\" data-end=\"990\"><strong data-start=\"950\" data-end=\"990\">Classification of Orifice Flanges<\/strong><\/h2>\n<p data-start=\"992\" data-end=\"1175\"><strong><a href=\"https:\/\/www.piyush-steel.com\/ansi-asme-16.5-orifice-flanges.html\">Orifice flanges<\/a><\/strong> can be categorized based on several criteria \u2014 including connection type, orifice location, pressure class, and flange face type. Below we explore each type in detail:<\/p>\n<h3 data-start=\"1182\" data-end=\"1217\"><strong data-start=\"1185\" data-end=\"1217\">Based on Connection Type<\/strong><\/h3>\n<p data-start=\"1219\" data-end=\"1314\">Different connection methods suit different installation requirements and operating conditions:<\/p>\n<h4 data-start=\"1316\" data-end=\"1352\"><strong data-start=\"1320\" data-end=\"1352\">a) Weld Neck Orifice Flanges<\/strong><\/h4>\n<ul data-start=\"1353\" data-end=\"1658\">\n<li data-start=\"1353\" data-end=\"1437\">\n<p data-start=\"1355\" data-end=\"1437\"><strong data-start=\"1355\" data-end=\"1371\">Description:<\/strong> These feature a long tapered hub welded directly to the pipeline.<\/p>\n<\/li>\n<li data-start=\"1438\" data-end=\"1565\">\n<p data-start=\"1440\" data-end=\"1565\"><strong data-start=\"1440\" data-end=\"1449\">Uses:<\/strong> Ideal for <strong data-start=\"1460\" data-end=\"1477\">high\u2011pressure<\/strong> and <strong data-start=\"1482\" data-end=\"1502\">high\u2011temperature<\/strong> applications like petrochemical, oil &amp; gas, and energy plants.<\/p>\n<\/li>\n<li data-start=\"1566\" data-end=\"1658\">\n<p data-start=\"1568\" data-end=\"1658\"><strong data-start=\"1568\" data-end=\"1582\">Advantage:<\/strong> Provides excellent structural integrity and reduced stress concentration.<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"1660\" data-end=\"1695\"><strong data-start=\"1664\" data-end=\"1695\">b) Threaded Orifice Flanges<\/strong><\/h4>\n<ul data-start=\"1696\" data-end=\"1938\">\n<li data-start=\"1696\" data-end=\"1776\">\n<p data-start=\"1698\" data-end=\"1776\"><strong data-start=\"1698\" data-end=\"1714\">Description:<\/strong> These have internal threads for screwing onto threaded pipes.<\/p>\n<\/li>\n<li data-start=\"1777\" data-end=\"1875\">\n<p data-start=\"1779\" data-end=\"1875\"><strong data-start=\"1779\" data-end=\"1788\">Uses:<\/strong> Best for <strong data-start=\"1798\" data-end=\"1824\">low to medium pressure<\/strong> systems where welding is difficult or impractical.<\/p>\n<\/li>\n<li data-start=\"1876\" data-end=\"1938\">\n<p data-start=\"1878\" data-end=\"1938\"><strong data-start=\"1878\" data-end=\"1892\">Advantage:<\/strong> Easy to install and remove without welding.<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"1940\" data-end=\"1974\"><strong data-start=\"1944\" data-end=\"1974\">c) Slip\u2011On Orifice Flanges<\/strong><\/h4>\n<ul data-start=\"1975\" data-end=\"2255\">\n<li data-start=\"1975\" data-end=\"2071\">\n<p data-start=\"1977\" data-end=\"2071\"><strong data-start=\"1977\" data-end=\"1993\">Description:<\/strong> These flanges slip over the pipe and are then welded both inside and outside.<\/p>\n<\/li>\n<li data-start=\"2072\" data-end=\"2159\">\n<p data-start=\"2074\" data-end=\"2159\"><strong data-start=\"2074\" data-end=\"2083\">Uses:<\/strong> Suitable for <strong data-start=\"2097\" data-end=\"2128\">lower pressure environments<\/strong> and general industrial piping.<\/p>\n<\/li>\n<li data-start=\"2160\" data-end=\"2255\">\n<p data-start=\"2162\" data-end=\"2255\"><strong data-start=\"2162\" data-end=\"2176\">Advantage:<\/strong> Simple alignment and welding make them cost\u2011effective for many applications.<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"2257\" data-end=\"2305\"><strong data-start=\"2261\" data-end=\"2305\">d) RTJ (Ring Type Joint) Orifice Flanges<\/strong><\/h4>\n<ul data-start=\"2306\" data-end=\"2603\">\n<li data-start=\"2306\" data-end=\"2416\">\n<p data-start=\"2308\" data-end=\"2416\"><strong data-start=\"2308\" data-end=\"2324\">Description:<\/strong> These flanges use a precisely machined metal ring gasket to form a <strong data-start=\"2392\" data-end=\"2415\">high\u2011integrity seal<\/strong>.<\/p>\n<\/li>\n<li data-start=\"2417\" data-end=\"2522\">\n<p data-start=\"2419\" data-end=\"2522\"><strong data-start=\"2419\" data-end=\"2428\">Uses:<\/strong> Common in <strong data-start=\"2439\" data-end=\"2474\">high\u2011pressure, high\u2011temperature<\/strong> applications where leak prevention is critical.<\/p>\n<\/li>\n<li data-start=\"2523\" data-end=\"2603\">\n<p data-start=\"2525\" data-end=\"2603\"><strong data-start=\"2525\" data-end=\"2539\">Advantage:<\/strong> Offers superior sealing compared to raised face (RF) designs.<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"2605\" data-end=\"2637\"><strong data-start=\"2609\" data-end=\"2637\">e) Blind Orifice Flanges<\/strong><\/h4>\n<ul data-start=\"2638\" data-end=\"2812\">\n<li data-start=\"2638\" data-end=\"2725\">\n<p data-start=\"2640\" data-end=\"2725\"><strong data-start=\"2640\" data-end=\"2656\">Description:<\/strong> Solid flanges that block off flow while retaining pressure tappings.<\/p>\n<\/li>\n<li data-start=\"2726\" data-end=\"2812\">\n<p data-start=\"2728\" data-end=\"2812\"><strong data-start=\"2728\" data-end=\"2737\">Uses:<\/strong> Used in systems where flow measurement needs to be temporarily isolated.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"2819\" data-end=\"2867\"><strong data-start=\"2822\" data-end=\"2867\">Based on Orifice Location (Bore Type)<\/strong><\/h3>\n<p data-start=\"2869\" data-end=\"2949\">The design of the orifice plate inside the flange helps match measurement needs:<\/p>\n<h4 data-start=\"2951\" data-end=\"2988\"><strong data-start=\"2955\" data-end=\"2988\">a) Concentric Orifice Flanges<\/strong><\/h4>\n<ul data-start=\"2989\" data-end=\"3211\">\n<li data-start=\"2989\" data-end=\"3047\">\n<p data-start=\"2991\" data-end=\"3047\"><strong data-start=\"2991\" data-end=\"3003\">Feature:<\/strong> The orifice hole is centered in the flange.<\/p>\n<\/li>\n<li data-start=\"3048\" data-end=\"3135\">\n<p data-start=\"3050\" data-end=\"3135\"><strong data-start=\"3050\" data-end=\"3063\">Use Case:<\/strong> Accurate measurement of clean fluid flows such as water, steam, or gas.<\/p>\n<\/li>\n<li data-start=\"3136\" data-end=\"3211\">\n<p data-start=\"3138\" data-end=\"3211\"><strong data-start=\"3138\" data-end=\"3152\">Advantage:<\/strong> Provides uniform pressure drop and stable flow readings.<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"3213\" data-end=\"3249\"><strong data-start=\"3217\" data-end=\"3249\">b) Eccentric Orifice Flanges<\/strong><\/h4>\n<ul data-start=\"3250\" data-end=\"3453\">\n<li data-start=\"3250\" data-end=\"3313\">\n<p data-start=\"3252\" data-end=\"3313\"><strong data-start=\"3252\" data-end=\"3264\">Feature:<\/strong> The orifice bore is offset from the pipe center.<\/p>\n<\/li>\n<li data-start=\"3314\" data-end=\"3395\">\n<p data-start=\"3316\" data-end=\"3395\"><strong data-start=\"3316\" data-end=\"3329\">Use Case:<\/strong> Ideal for fluids containing solids, slurries, or entrained gases.<\/p>\n<\/li>\n<li data-start=\"3396\" data-end=\"3453\">\n<p data-start=\"3398\" data-end=\"3453\"><strong data-start=\"3398\" data-end=\"3412\">Advantage:<\/strong> Reduces trailing eddies and blockages.<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"3455\" data-end=\"3494\"><strong data-start=\"3459\" data-end=\"3494\">c) Square\u2011Edged Orifice Flanges<\/strong><\/h4>\n<ul data-start=\"3495\" data-end=\"3752\">\n<li data-start=\"3495\" data-end=\"3547\">\n<p data-start=\"3497\" data-end=\"3547\"><strong data-start=\"3497\" data-end=\"3509\">Feature:<\/strong> Precision square bore at the orifice.<\/p>\n<\/li>\n<li data-start=\"3548\" data-end=\"3674\">\n<p data-start=\"3550\" data-end=\"3674\"><strong data-start=\"3550\" data-end=\"3563\">Use Case:<\/strong> Applications that require <strong data-start=\"3590\" data-end=\"3637\">high measurement accuracy and repeatability<\/strong> \u2014 such as custody transfer metering.<\/p>\n<\/li>\n<li data-start=\"3675\" data-end=\"3752\">\n<p data-start=\"3677\" data-end=\"3752\"><strong data-start=\"3677\" data-end=\"3691\">Advantage:<\/strong> Minimizes turbulence and provides a defined pressure drop.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"3759\" data-end=\"3795\"><strong data-start=\"3762\" data-end=\"3795\">Based on Pressure Classes<\/strong><\/h3>\n<p data-start=\"3797\" data-end=\"3865\">Orifice flanges come in standard ANSI\/ASME pressure ratings such as:<\/p>\n<ul data-start=\"3867\" data-end=\"4003\">\n<li data-start=\"3867\" data-end=\"3914\">\n<p data-start=\"3869\" data-end=\"3914\"><strong data-start=\"3869\" data-end=\"3912\">Class 150, 300, 600, 900, 1500 and 2500<\/strong><\/p>\n<\/li>\n<li data-start=\"3915\" data-end=\"4003\">\n<p data-start=\"3917\" data-end=\"4003\">Suitable for various operational pressures from low to ultra\u2011high in pipeline systems.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4005\" data-end=\"4125\">These classes determine the flange\u2019s <strong data-start=\"4042\" data-end=\"4081\">temperature and pressure resistance<\/strong>, crucial for engineering design and safety.<\/p>\n<h3 data-start=\"4132\" data-end=\"4171\"><strong data-start=\"4135\" data-end=\"4171\">Based on Flange Facing Types<\/strong><\/h3>\n<h4 data-start=\"4173\" data-end=\"4200\"><strong data-start=\"4177\" data-end=\"4200\">a) Raised Face (RF)<\/strong><\/h4>\n<ul data-start=\"4201\" data-end=\"4278\">\n<li data-start=\"4201\" data-end=\"4231\">\n<p data-start=\"4203\" data-end=\"4231\">The most common flange face.<\/p>\n<\/li>\n<li data-start=\"4232\" data-end=\"4278\">\n<p data-start=\"4234\" data-end=\"4278\">Ease of installation and wide compatibility.<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"4280\" data-end=\"4305\"><strong data-start=\"4284\" data-end=\"4305\">b) Flat Face (FF)<\/strong><\/h4>\n<ul data-start=\"4306\" data-end=\"4372\">\n<li data-start=\"4306\" data-end=\"4372\">\n<p data-start=\"4308\" data-end=\"4372\">Used where mating flange has a flat face to minimize distortion.<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"4374\" data-end=\"4406\"><strong data-start=\"4378\" data-end=\"4406\">c) Ring Type Joint (RTJ)<\/strong><\/h4>\n<ul data-start=\"4407\" data-end=\"4458\">\n<li data-start=\"4407\" data-end=\"4458\">\n<p data-start=\"4409\" data-end=\"4458\">Best for leak\u2011proof services under high pressure.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4460\" data-end=\"4532\">(Piyush Steel stocks all common facing types as per industry standards.)<\/p>\n<h2 data-start=\"4539\" data-end=\"4590\"><strong data-start=\"4542\" data-end=\"4590\">Materials &amp; Standards for Orifice Flanges<\/strong><\/h2>\n<p data-start=\"4592\" data-end=\"4765\">At <strong data-start=\"4595\" data-end=\"4611\">Piyush Steel<\/strong>, our orifice flanges are available in a wide range of <strong data-start=\"4666\" data-end=\"4679\">materials<\/strong> and <strong data-start=\"4684\" data-end=\"4711\">international standards<\/strong> such as ANSI\/ASME B16.5, B16.36, DIN, BS, and more.<\/p>\n<h3 data-start=\"4767\" data-end=\"4792\"><strong data-start=\"4771\" data-end=\"4792\">Materials Offered<\/strong><\/h3>\n<p data-start=\"4793\" data-end=\"5010\">\u2714 Carbon Steel (ASTM A105, A350)<br data-start=\"4825\" data-end=\"4828\" \/>\u2714 Stainless Steel (ASTM A182 304\/316\/904L)<br data-start=\"4870\" data-end=\"4873\" \/>\u2714 Alloy Steel (F5, F11, F22)<br data-start=\"4901\" data-end=\"4904\" \/>\u2714 Nickel &amp; Duplex Alloys \u2014 Monel, Inconel, Super Duplex<br data-start=\"4959\" data-end=\"4962\" \/>\u2714 Custom materials as per project requirements<\/p>\n<p data-start=\"5012\" data-end=\"5157\">This range ensures suitability across industries such as <strong data-start=\"5069\" data-end=\"5154\">oil &amp; gas, chemical, power, pharmaceuticals, water treatment, and food processing<\/strong>.<\/p>\n<h2 data-start=\"5164\" data-end=\"5205\"><strong data-start=\"5167\" data-end=\"5205\">Applications of Orifice Flanges<\/strong><\/h2>\n<p data-start=\"5207\" data-end=\"5250\">Orifice flanges are critical components in:<\/p>\n<p data-start=\"5252\" data-end=\"5462\">\u2705 Flow metering systems in oil &amp; gas pipelines<br data-start=\"5298\" data-end=\"5301\" \/>\u2705 Chemical processing plants<br data-start=\"5329\" data-end=\"5332\" \/>\u2705 Power generation facilities<br data-start=\"5361\" data-end=\"5364\" \/>\u2705 Water &amp; wastewater treatment<br data-start=\"5394\" data-end=\"5397\" \/>\u2705 Steam &amp; compressed air monitoring<br data-start=\"5432\" data-end=\"5435\" \/>\u2705 Petrochemicals and more<\/p>\n<p data-start=\"5464\" data-end=\"5639\">Their robust construction, accurate pressure tappings, and compatibility with orifice plates make them ideal for precise flow measurement in demanding industrial environments.<\/p>\n<h2 data-start=\"5646\" data-end=\"5696\"><strong data-start=\"5649\" data-end=\"5696\">Why Choose Piyush Steel Orifice Flanges?<\/strong><\/h2>\n<p data-start=\"5698\" data-end=\"5730\">At <strong data-start=\"5701\" data-end=\"5717\">Piyush Steel<\/strong>, we provide:<\/p>\n<p data-start=\"5732\" data-end=\"6034\">\ud83d\udd39 High quality orifice flanges manufactured under strict quality control<br data-start=\"5805\" data-end=\"5808\" \/>\ud83d\udd39 Compliance with international standards (ANSI, ASME, DIN, BS)<br data-start=\"5872\" data-end=\"5875\" \/>\ud83d\udd39 Wide range of sizes, materials, and pressure classes<br data-start=\"5930\" data-end=\"5933\" \/>\ud83d\udd39 Customized solutions for specific industry needs<br data-start=\"5984\" data-end=\"5987\" \/>\ud83d\udd39 On\u2011time delivery and global export support<\/p>\n<h2 data-start=\"6041\" data-end=\"6058\"><strong data-start=\"6044\" data-end=\"6058\">Conclusion<\/strong><\/h2>\n<p data-start=\"6060\" data-end=\"6415\">Understanding the <strong data-start=\"6078\" data-end=\"6106\">types of orifice flanges<\/strong> is essential for choosing the right component for your flow measurement and process system. Whether it\u2019s high\u2011pressure applications requiring RTJ flanges, or precision metering needing square\u2011edged or concentric orifice designs, <strong data-start=\"6336\" data-end=\"6352\">Piyush Steel<\/strong> offers a comprehensive portfolio to meet your project demands.<\/p>\n<div class=\"ttr_end\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Orifice flanges are specialized pipe flanges designed to work with orifice meters for measuring the flow rate of liquids and gases in pipelines. Unlike standard flanges, orifice flanges are machined with pairs of pressure tappings, eliminating the need for separate pressure taps on the pipe wall. These flanges are engineered to securely hold orifice plates &#8230; <a title=\"Orifice Flange Types: A Comprehensive Guide for Engineers\" class=\"read-more\" href=\"https:\/\/www.piyush-steel.com\/blog\/orifice-flange-types\/\" aria-label=\"More on Orifice Flange Types: A Comprehensive Guide for Engineers\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":466,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-465","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 v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Orifice Flange Types: A Comprehensive Guide for Engineers<\/title>\n<meta name=\"description\" content=\"Understanding the types of orifice flanges is essential for choosing the right component for 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