{"id":1032,"date":"2026-04-20T22:35:38","date_gmt":"2026-04-21T02:35:38","guid":{"rendered":"https:\/\/www.songhaiflange.com\/?p=1032"},"modified":"2026-04-21T20:19:07","modified_gmt":"2026-04-22T00:19:07","slug":"orifice-flanges-what-they-are-how-they-work-and-when-to-use-them","status":"publish","type":"post","link":"https:\/\/www.songhaiflange.com\/vi\/2026\/04\/20\/orifice-flanges-what-they-are-how-they-work-and-when-to-use-them\/","title":{"rendered":"Orifice Flanges What They Are How They Work and When to Use Them"},"content":{"rendered":"<h2>Orifice Flanges Guide<\/h2>\n<p>Orifice flanges are specialized flanges designed for flow measurement in piping systems. They work in conjunction with an orifice plate to create a pressure differential that can be measured and converted to flow rate.<\/p>\n<h3>What Are Orifice Flanges<\/h3>\n<p>Orifice flanges consist of a matched pair of flanges with an orifice plate sandwiched between them. The orifice plate has a precisely machined hole that creates a restriction in the flow stream.<\/p>\n<h3>How They Work<\/h3>\n<ol>\n<li><strong>Flow Restriction:<\/strong> Fluid passes through the orifice plate opening<\/li>\n<li><strong>Pressure Drop:<\/strong> Velocity increases, creating pressure differential<\/li>\n<li><strong>Measurement:<\/strong> Pressure taps measure upstream and downstream pressure<\/li>\n<li><strong>Calculation:<\/strong> Flow rate calculated using Bernoulli equation<\/li>\n<\/ol>\n<h3>Key Components<\/h3>\n<ul>\n<li><strong>Orifice Plate:<\/strong> Precision machined plate with concentric or eccentric bore<\/li>\n<li><strong>Flange Pair:<\/strong> Matched flanges with pressure tap connections<\/li>\n<li><strong>Pressure Taps:<\/strong> Located at flange, vena contracta, or pipe taps<\/li>\n<li><strong>Gaskets:<\/strong> Special gaskets with tabs for plate alignment<\/li>\n<li><strong>Jack Screws:<\/strong> For easy plate removal and maintenance<\/li>\n<\/ul>\n<h3>Types of Orifice Plates<\/h3>\n<table>\n<tr>\n<th>Lo\u1ea1i<\/th>\n<th>Application<\/th>\n<\/tr>\n<tr>\n<td>Concentric<\/td>\n<td>Clean liquids, gases, and steam<\/td>\n<\/tr>\n<tr>\n<td>Eccentric<\/td>\n<td>Liquids with solids or gases with liquids<\/td>\n<\/tr>\n<tr>\n<td>Segmental<\/td>\n<td>Slurries and dirty fluids<\/td>\n<\/tr>\n<tr>\n<td>Quadrant Edge<\/td>\n<td>Low Reynolds number flows<\/td>\n<\/tr>\n<\/table>\n<h3>\u1ee8ng d\u1ee5ng<\/h3>\n<ul>\n<li>Natural gas flow measurement<\/li>\n<li>Steam flow monitoring<\/li>\n<li>Water and wastewater treatment<\/li>\n<li>Chemical process control<\/li>\n<li>Petroleum refining<\/li>\n<li>HVAC system balancing<\/li>\n<\/ul>\n<h3>\u01afu \u0111i\u1ec3m<\/h3>\n<ul>\n<li>Simple, proven technology<\/li>\n<li>No moving parts<\/li>\n<li>Wide range of sizes and materials<\/li>\n<li>Relatively low cost<\/li>\n<li>Easy to install and maintain<\/li>\n<li>Interchangeable orifice plates<\/li>\n<\/ul>\n<h3>Limitations<\/h3>\n<ul>\n<li>Permanent pressure loss (energy cost)<\/li>\n<li>Limited turndown ratio (typically 3:1 to 5:1)<\/li>\n<li>Requires straight pipe runs upstream and downstream<\/li>\n<li>Accuracy affected by wear and erosion<\/li>\n<li>Not suitable for dirty or abrasive fluids<\/li>\n<\/ul>\n<h3>Installation Requirements<\/h3>\n<ol>\n<li>Minimum 10-20 pipe diameters straight run upstream<\/li>\n<li>Minimum 5-10 pipe diameters straight run downstream<\/li>\n<li>Proper gasket alignment (no gasket protrusion into flow)<\/li>\n<li>Correct orifice plate orientation (bevel downstream)<\/li>\n<li>Pressure tap lines properly purged and filled<\/li>\n<\/ol>\n<h3>Standards and Specifications<\/h3>\n<ul>\n<li>ASME MFC-3M: Measurement of fluid flow in closed conduits<\/li>\n<li>ISO 5167: Orifice plates, nozzles, and Venturi tubes<\/li>\n<li>AGA Report No. 3: Natural gas flow measurement<\/li>\n<li>ASME B16.36: Orifice flanges<\/li>\n<\/ul>\n<h3>Accuracy Considerations<\/h3>\n<p>Typical accuracy ranges from 0.5% to 2% of full scale, depending on:<\/p>\n<ul>\n<li>Orifice plate machining tolerance<\/li>\n<li>Pressure tap location accuracy<\/li>\n<li>Differential pressure transmitter accuracy<\/li>\n<li>Installation conditions<\/li>\n<li>Fluid properties and flow regime<\/li>\n<\/ul>\n<p>Orifice flanges remain one of the most widely used flow measurement devices in process industries due to their simplicity, reliability, and cost-effectiveness.<\/p>\n<p><strong>WhatsApp:<\/strong>\u00a0+86-18658777855<br \/>\n<strong>Email:<\/strong>\u00a01007788887@qq.com<br \/>\n<a href=\"https:\/\/www.720yun.com\/vr\/a6ajt7ynrw0\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-884\" src=\"http:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4.webp\" alt=\"\" width=\"1290\" height=\"2317\" title=\"\" srcset=\"https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4.webp 1290w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-167x300.webp 167w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-570x1024.webp 570w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-768x1379.webp 768w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-855x1536.webp 855w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-1140x2048.webp 1140w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-7x12.webp 7w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-416x747.webp 416w\" sizes=\"auto, (max-width: 1290px) 100vw, 1290px\" \/><\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Orifice Flanges Guide Orifice flanges are specialized flanges designed for flow measurement in piping systems. They work in conjunction with an orifice plate to create a pressure differential that can be measured and converted to flow rate. What Are Orifice Flanges Orifice flanges consist of a matched pair of flanges with an orifice plate sandwiched [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[66,88,92,91],"class_list":["post-1032","post","type-post","status-publish","format-standard","hentry","category-blog","tag-flange","tag-gasket","tag-raised","tag-rtj"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/posts\/1032","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/comments?post=1032"}],"version-history":[{"count":2,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/posts\/1032\/revisions"}],"predecessor-version":[{"id":1038,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/posts\/1032\/revisions\/1038"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/media?parent=1032"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/categories?post=1032"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/tags?post=1032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}