{"id":1032,"date":"2026-04-20T22:35:38","date_gmt":"2026-04-21T02:35:38","guid":{"rendered":"https:\/\/www.songhaiflange.com\/?p=1032"},"modified":"2026-04-20T22:35:58","modified_gmt":"2026-04-21T02:35:58","slug":"orifice-flanges-what-they-are-how-they-work-and-when-to-use-them","status":"publish","type":"post","link":"https:\/\/www.songhaiflange.com\/de\/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":"

Orifice Flanges Guide<\/h2>\n

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

What Are Orifice Flanges<\/h3>\n

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

How They Work<\/h3>\n
    \n
  1. Flow Restriction:<\/strong> Fluid passes through the orifice plate opening<\/li>\n
  2. Pressure Drop:<\/strong> Velocity increases, creating pressure differential<\/li>\n
  3. Measurement:<\/strong> Pressure taps measure upstream and downstream pressure<\/li>\n
  4. Calculation:<\/strong> Flow rate calculated using Bernoulli equation<\/li>\n<\/ol>\n

    Key Components<\/h3>\n
      \n
    • Orifice Plate:<\/strong> Precision machined plate with concentric or eccentric bore<\/li>\n
    • Flange Pair:<\/strong> Matched flanges with pressure tap connections<\/li>\n
    • Pressure Taps:<\/strong> Located at flange, vena contracta, or pipe taps<\/li>\n
    • Gaskets:<\/strong> Special gaskets with tabs for plate alignment<\/li>\n
    • Jack Screws:<\/strong> For easy plate removal and maintenance<\/li>\n<\/ul>\n

      Types of Orifice Plates<\/h3>\n\n\n\n\n\n\n
      Typ<\/th>\nApplication<\/th>\n<\/tr>\n
      Concentric<\/td>\nClean liquids, gases, and steam<\/td>\n<\/tr>\n
      Eccentric<\/td>\nLiquids with solids or gases with liquids<\/td>\n<\/tr>\n
      Segmental<\/td>\nSlurries and dirty fluids<\/td>\n<\/tr>\n
      Quadrant Edge<\/td>\nLow Reynolds number flows<\/td>\n<\/tr>\n<\/table>\n

      Anwendungen<\/h3>\n
        \n
      • Natural gas flow measurement<\/li>\n
      • Steam flow monitoring<\/li>\n
      • Water and wastewater treatment<\/li>\n
      • Chemical process control<\/li>\n
      • Petroleum refining<\/li>\n
      • HVAC system balancing<\/li>\n<\/ul>\n

        Vorteile<\/h3>\n
          \n
        • Simple, proven technology<\/li>\n
        • No moving parts<\/li>\n
        • Wide range of sizes and materials<\/li>\n
        • Relatively low cost<\/li>\n
        • Easy to install and maintain<\/li>\n
        • Interchangeable orifice plates<\/li>\n<\/ul>\n

          Limitations<\/h3>\n
            \n
          • Permanent pressure loss (energy cost)<\/li>\n
          • Limited turndown ratio (typically 3:1 to 5:1)<\/li>\n
          • Requires straight pipe runs upstream and downstream<\/li>\n
          • Accuracy affected by wear and erosion<\/li>\n
          • Not suitable for dirty or abrasive fluids<\/li>\n<\/ul>\n

            Installation Requirements<\/h3>\n
              \n
            1. Minimum 10-20 pipe diameters straight run upstream<\/li>\n
            2. Minimum 5-10 pipe diameters straight run downstream<\/li>\n
            3. Proper gasket alignment (no gasket protrusion into flow)<\/li>\n
            4. Correct orifice plate orientation (bevel downstream)<\/li>\n
            5. Pressure tap lines properly purged and filled<\/li>\n<\/ol>\n

              Standards and Specifications<\/h3>\n
                \n
              • ASME MFC-3M: Measurement of fluid flow in closed conduits<\/li>\n
              • ISO 5167: Orifice plates, nozzles, and Venturi tubes<\/li>\n
              • AGA Report No. 3: Natural gas flow measurement<\/li>\n
              • ASME B16.36: Orifice flanges<\/li>\n<\/ul>\n

                Accuracy Considerations<\/h3>\n

                Typical accuracy ranges from 0.5% to 2% of full scale, depending on:<\/p>\n

                  \n
                • Orifice plate machining tolerance<\/li>\n
                • Pressure tap location accuracy<\/li>\n
                • Differential pressure transmitter accuracy<\/li>\n
                • Installation conditions<\/li>\n
                • Fluid properties and flow regime<\/li>\n<\/ul>\n

                  Orifice flanges remain one of the most widely used flow measurement devices in process industries due to their simplicity, reliability, and cost-effectiveness.<\/p>","protected":false},"excerpt":{"rendered":"

                  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 […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","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\/de\/wp-json\/wp\/v2\/posts\/1032","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/comments?post=1032"}],"version-history":[{"count":1,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/posts\/1032\/revisions"}],"predecessor-version":[{"id":1033,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/posts\/1032\/revisions\/1033"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/media?parent=1032"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/categories?post=1032"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/tags?post=1032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}