{"id":2021,"date":"2025-04-24T16:38:46","date_gmt":"2025-04-24T08:38:46","guid":{"rendered":"https:\/\/www.ductileironsuppliers.com\/?post_type=product&p=2021"},"modified":"2025-04-24T16:38:46","modified_gmt":"2025-04-24T08:38:46","slug":"class-250-ductile-iron-pipe-suppliers","status":"publish","type":"product","link":"https:\/\/www.ductileironsuppliers.com\/ar\/product\/class-250-ductile-iron-pipe-suppliers","title":{"rendered":"\u0645\u0648\u0631\u062f\u0648 \u0623\u0646\u0627\u0628\u064a\u0628 \u062d\u062f\u064a\u062f \u0627\u0644\u062f\u0643\u062a\u0627\u064a\u0644 \u0641\u0626\u0629 250"},"content":{"rendered":"

Class 250 ductile iron pipe combines robust pressure capacity with proven longevity, making it a top choice for water, wastewater, irrigation and industrial networks. Engineered to a nominal working pressure of 250 psi<\/strong> (with a 100 psi<\/strong> surge allowance), its nodular-iron body features a shop-applied cement-mortar lining and versatile external protection to achieve an expected service life exceeding 100 years<\/strong>. Installation is streamlined via push-on, mechanical, restrained and flanged joints<\/strong>, ensuring rapid, leak-tight assembly in the trench or at the pump vault. Fully compliant with ANSI\/AWWA C150\/A21.50\u201391<\/strong>, C151\/A21.51<\/strong>, C104\/C105<\/strong>, C110\/C111<\/strong>, ISO 2531<\/strong>, EN 545<\/strong> and EN 598<\/strong> standards, it delivers a competitive wall-thickness and life-cycle cost profile versus Class 52, 53, 150 and 350 series.<\/p>\n

Application Scenarios<\/h2>\n
    \n
  • \n

    Municipal potable water distribution:<\/strong> Class 250\u2019s 250 psi rating supports high-pressure loops and feeders in urban and suburban zones.<\/p>\n<\/li>\n

  • \n

    Wastewater and sewer mains:<\/strong> Cement-mortar lining resists tuberculation in gravity and force mains, minimizing cleaning cycles.<\/p>\n<\/li>\n

  • \n

    Agricultural irrigation networks:<\/strong> Specialized irrigation ranges of ductile iron pipes deliver low friction losses and exceptional durability in field conditions.<\/p>\n<\/li>\n

  • \n

    Industrial process piping:<\/strong> Flanged Class 250 fittings link directly to pumps, valves and metering assemblies in chemical and power plants.<\/p>\n<\/li>\n<\/ul>\n

    Service Life<\/h2>\n

    Modern ductile iron pipelines, when coated with cement-mortar and properly sleeved, routinely outlast 100 years<\/strong> in typical soil environments. Detailed life-cycle analyses confirm Class 250\u2019s low operating costs and minimal maintenance burden yield superior total-cost performance versus PVC and other materials over a century-long horizon.<\/p>\n

    Installation and Jointing<\/h2>\n

    Push-On & Mechanical Joints<\/h3>\n
      \n
    • \n

      Push-on joints<\/strong> employ a lubricant-coated gasket for quick, trench-side assembly without bolting.<\/p>\n<\/li>\n

    • \n

      Mechanical joints<\/strong> use gland-and-bolt restraint gaskets (e.g., Field-Lok\u00ae) rated for 250 psi, eliminating thrust-block requirements in many layouts.<\/p>\n<\/li>\n<\/ul>\n

      Restrained & Flanged Connections<\/h3>\n
        \n
      • \n

        Restrained joints<\/strong> lock spigot into bell under pressure surges, safeguarding against separation in bends and dead-ends.<\/p>\n<\/li>\n

      • \n

        Flanged ends<\/strong> bolt to equipment via ANSI B16.1 250 psi patterns or AWWA C207 configurations, yielding rigid, dismantlable connections.<\/p>\n<\/li>\n<\/ul>\n

        Corrosion Protection<\/h3>\n
          \n
        • \n

          Internal lining:<\/strong> Centrifugal cement-mortar per ANSI\/AWWA C104 forms a high-pH barrier against tuberculation.<\/p>\n<\/li>\n

        • \n

          External coatings:<\/strong> Options include bonded zinc, asphaltic enamel or epoxy; loose polyethylene sleeving per AWWA C105 can be added for aggressive soils.<\/p>\n<\/li>\n<\/ul>\n

          International Standards<\/h2>\n
            \n
          • \n

            ANSI\/AWWA C150\/A21.50<\/strong> \u2013 Pressure-class thickness definitions<\/p>\n<\/li>\n

          • \n

            ANSI\/AWWA C151\/A21.51<\/strong> \u2013 Pipe dimensions and tolerances<\/p>\n<\/li>\n

          • \n

            ANSI\/AWWA C104\/C105<\/strong> \u2013 Lining and encasement specifications<\/p>\n<\/li>\n

          • \n

            ANSI\/AWWA C110\/C111<\/strong> \u2013 Mechanical & push-on joint performance<\/p>\n<\/li>\n

          • \n

            ISO 2531:2012<\/strong>, EN 545<\/strong>, EN 598<\/strong> \u2013 International benchmarks for water and sewage applications<\/p>\n<\/li>\n<\/ul>\n

            Comparative Parameters (Classes 52, 53, 150, 250, 350)<\/h2>\n
            \n

             <\/p>\n

            \n\n\n\n\n\n\n\n\n\n
            Class<\/th>\nWorking Pressure<\/th>\nSurge Allowance<\/th>\nJoint Types<\/th>\nWall-Thickness Range<\/th>\nDiameters Available<\/th>\n<\/tr>\n<\/thead>\n
            52<\/strong><\/a><\/td>\n200 psi<\/td>\n100 psi<\/td>\nMechanical only<\/td>\n6.8\u20139.9 mm<\/td>\n4\u2033\u201348\u2033<\/td>\n<\/tr>\n
            53<\/strong><\/a><\/td>\n250 psi<\/td>\n100 psi<\/td>\nMechanical only<\/td>\n7.2\u201310.9 mm<\/td>\n4\u2033\u201348\u2033<\/td>\n<\/tr>\n
            150<\/strong><\/a><\/td>\n150 psi<\/td>\n100 psi<\/td>\nPush-on, MJ, restrained, flanged<\/td>\n6.4\u201322.5 mm<\/td>\n3\u2033\u201364\u2033<\/td>\n<\/tr>\n
            250<\/strong><\/td>\n250 psi<\/td>\n100 psi<\/td>\nPush-on, MJ, restrained, flanged<\/td>\n7.1\u201324.3 mm<\/td>\n3\u2033\u201364\u2033<\/td>\n<\/tr>\n
            350<\/strong><\/a><\/td>\n350 psi<\/td>\n100 psi<\/td>\nPush-on, MJ, restrained, flanged<\/td>\n8.0\u201327.6 mm<\/td>\n3\u2033\u201364\u2033<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

            Advantages<\/h2>\n
              \n
            • \n

              Exceptional Durability:<\/strong> Over a century of proven field performance<\/p>\n<\/li>\n

            • \n

              High Strength:<\/strong> Meets AWWA tensile and impact standards under deep cover and surge events<\/p>\n<\/li>\n

            • \n

              Corrosion Control:<\/strong> Cement-mortar lining plus coatings\/sleeving minimize internal and external degradation<\/p>\n<\/li>\n

            • \n

              Installation Flexibility:<\/strong> Multiple joint systems adapt to any trench or above-ground scenario<\/p>\n<\/li>\n

            • \n

              Sustainability:<\/strong> Up to 90 % recycled content; fully recyclable at end-of-life<\/p>\n<\/li>\n<\/ul>\n

              Frequently Asked Questions<\/h2>\n
                \n
              1. \n

                What does \u201cClass 250\u201d mean?<\/strong>
                It denotes a nominal working pressure rating of 250 psi, with a 100 psi surge allowance, per ANSI\/AWWA C150 tables.<\/p>\n<\/li>\n

              2. \n

                How long will Class 250 pipe last?<\/strong>
                With proper lining and encasement, service lives regularly exceed 100 years.<\/p>\n<\/li>\n

              3. \n

                Which joint type installs fastest?<\/strong>
                Push-on joints need only bell-hole prep and no bolting, speeding trench-time.<\/p>\n<\/li>\n

              4. \n

                Can it be used in corrosive soils?<\/strong>
                Yes\u2014pair with loose polyethylene sleeving per AWWA C105 or epoxy coating for aggressive environments.<\/p>\n<\/li>\n

              5. \n

                What diameters are available?<\/strong>
                Nominal sizes from 3\u2033 to 64\u2033 cover most distribution and transmission needs.<\/p>\n<\/li>\n<\/ol>\n

                Case Studies<\/h2>\n
                  \n
                • \n

                  University of Michigan LCCA:<\/strong> A 1 000 ft, 8\u2033 Class 250 main demonstrated lower total cost of ownership<\/strong> over a 100-year design life versus PVC in a detailed life-cycle cost analysis.<\/p>\n<\/li>\n

                • \n

                  Louisville Water MRRP:<\/strong> Rehab of early-20th-century iron mains\u2014including Class 250 pipes\u2014in the Main-Replacement & Rehabilitation Program reduced annual break rates by over 70 %, extending system life with targeted cleaning and relining.<\/p>\n<\/li>\n<\/ul>\n

                  ductile iron pipe dimensions<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
                  <\/td>\n<\/td>\n<\/td>\nPipe body weight \uff08kg\/m)<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                  (Inside Diameter)<\/td>\n(Outside Diameter)<\/td>\nSocket Weight<\/td>\nK8<\/td>\nK9<\/td>\nK10<\/td>\nC class<\/td>\nTotal weight of Active Length=6M (kg)<\/td>\nTotal weight of Active Length=5.7M (kg)<\/td>\n<\/tr>\n
                  DN(mm)<\/td>\nOD(mm)<\/td>\n\u2248 kg<\/td>\nClass<\/td>\nkg\/m<\/td>\nK8<\/td>\nK9<\/td>\nK10<\/td>\nC class<\/td>\nK8<\/td>\nK9<\/td>\nK10<\/td>\nC class<\/td>\n<\/tr>\n
                  80<\/td>\n98<\/td>\n3.40<\/td>\n12.20<\/td>\n12.20<\/td>\n12.20<\/td>\nC40<\/td>\n9.10<\/td>\n77.00<\/td>\n77.00<\/td>\n77.00<\/td>\n58.00<\/td>\n73.00<\/td>\n73.00<\/td>\n73.00<\/td>\n55.00<\/td>\n<\/tr>\n
                  100<\/td>\n118<\/td>\n4.30<\/td>\n14.90<\/td>\n15.10<\/td>\n15.10<\/td>\nC40<\/td>\n11.12<\/td>\n93.70<\/td>\n95.00<\/td>\n95.00<\/td>\n71.00<\/td>\n90.00<\/td>\n91.00<\/td>\n90.00<\/td>\n68.00<\/td>\n<\/tr>\n
                  125<\/td>\n144<\/td>\n5.70<\/td>\n<\/td>\n18.90<\/td>\n<\/td>\nC40<\/td>\n<\/td>\n<\/td>\n119.00<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                  150<\/td>\n170<\/td>\n7.10<\/td>\n21.80<\/td>\n22.80<\/td>\n22.80<\/td>\nC40<\/td>\n16.48<\/td>\n138.00<\/td>\n144.00<\/td>\n144.00<\/td>\n106.00<\/td>\n132.00<\/td>\n138.00<\/td>\n137.00<\/td>\n101.00<\/td>\n<\/tr>\n
                  200<\/td>\n222<\/td>\n10.30<\/td>\n28.70<\/td>\n30.60<\/td>\n30.60<\/td>\nC40<\/td>\n22.62<\/td>\n183.00<\/td>\n194.00<\/td>\n194.00<\/td>\n146.00<\/td>\n174.00<\/td>\n185.00<\/td>\n185.00<\/td>\n139.00<\/td>\n<\/tr>\n
                  250<\/td>\n274<\/td>\n14.20<\/td>\n35.60<\/td>\n40.20<\/td>\n44.30<\/td>\nC40<\/td>\n32.63<\/td>\n228.00<\/td>\n255.00<\/td>\n280.00<\/td>\n210.00<\/td>\n218.00<\/td>\n244.00<\/td>\n267.00<\/td>\n200.00<\/td>\n<\/tr>\n
                  300<\/td>\n326<\/td>\n18.90<\/td>\n45.30<\/td>\n50.80<\/td>\n56.30<\/td>\nC30<\/td>\n43.90<\/td>\n290.00<\/td>\n323.00<\/td>\n357.00<\/td>\n282.00<\/td>\n278.00<\/td>\n309.00<\/td>\n340.00<\/td>\n269.00<\/td>\n<\/tr>\n
                  350<\/td>\n378<\/td>\n23.70<\/td>\n55.90<\/td>\n63.20<\/td>\n69.60<\/td>\nC30<\/td>\n51.88<\/td>\n359.00<\/td>\n403.00<\/td>\n441.00<\/td>\n335.00<\/td>\n343.00<\/td>\n384.00<\/td>\n420.00<\/td>\n319.00<\/td>\n<\/tr>\n
                  400<\/td>\n429<\/td>\n29.50<\/td>\n67.30<\/td>\n75.50<\/td>\n83.70<\/td>\nC30<\/td>\n60.78<\/td>\n433.00<\/td>\n482.00<\/td>\n532.00<\/td>\n394.00<\/td>\n414.00<\/td>\n460.00<\/td>\n506.00<\/td>\n376.00<\/td>\n<\/tr>\n
                  450<\/td>\n480<\/td>\n38.30<\/td>\n80.00<\/td>\n89.30<\/td>\n99.00<\/td>\nC30<\/td>\n73.30<\/td>\n515.00<\/td>\n575.00<\/td>\n632.00<\/td>\n472.00<\/td>\n492.00<\/td>\n550.00<\/td>\n597.00<\/td>\n450.00<\/td>\n<\/tr>\n
                  500<\/td>\n532<\/td>\n42.80<\/td>\n92.80<\/td>\n104.30<\/td>\n115.60<\/td>\nC30<\/td>\n87.20<\/td>\n600.00<\/td>\n669.00<\/td>\n736.00<\/td>\n566.00<\/td>\n572.00<\/td>\n638.00<\/td>\n702.00<\/td>\n540.00<\/td>\n<\/tr>\n
                  600<\/td>\n635<\/td>\n59.30<\/td>\n122.00<\/td>\n137.30<\/td>\n152.00<\/td>\nC30<\/td>\n120.62<\/td>\n791.00<\/td>\n882.00<\/td>\n971.00<\/td>\n783.00<\/td>\n755.00<\/td>\n842.00<\/td>\n926.00<\/td>\n747.00<\/td>\n<\/tr>\n
                  700<\/td>\n738<\/td>\n79.10<\/td>\n155.00<\/td>\n173.90<\/td>\n193.00<\/td>\nC25<\/td>\n142.15<\/td>\n1009.00<\/td>\n1123.00<\/td>\n1237.00<\/td>\n932.00<\/td>\n963.00<\/td>\n1071.00<\/td>\n1179.00<\/td>\n889.00<\/td>\n<\/tr>\n
                  800<\/td>\n842<\/td>\n102.60<\/td>\n192.00<\/td>\n215.20<\/td>\n239.00<\/td>\nC25<\/td>\n177.07<\/td>\n1255.00<\/td>\n1394.00<\/td>\n1537.00<\/td>\n1165.00<\/td>\n1197.00<\/td>\n1330.00<\/td>\n1465.00<\/td>\n1112.00<\/td>\n<\/tr>\n
                  900<\/td>\n945<\/td>\n129.60<\/td>\n232.00<\/td>\n260.20<\/td>\n289.00<\/td>\nC25<\/td>\n197.68<\/td>\n1521.00<\/td>\n1691.00<\/td>\n1863.00<\/td>\n1446.00<\/td>\n1452.00<\/td>\n1613.00<\/td>\n1777.00<\/td>\n1257.00<\/td>\n<\/tr>\n
                  1000<\/td>\n1048<\/td>\n161.30<\/td>\n275.00<\/td>\n309.30<\/td>\n343.20<\/td>\nC25<\/td>\n266.28<\/td>\n1811.00<\/td>\n2017.00<\/td>\n2221.00<\/td>\n1759.00<\/td>\n1729.00<\/td>\n1925.00<\/td>\n2118.00<\/td>\n1679.00<\/td>\n<\/tr>\n
                  1100<\/td>\n1152<\/td>\n194.70<\/td>\n<\/td>\n362.80<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n2372.00<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                  1200<\/td>\n1255<\/td>\n237.70<\/td>\n374.00<\/td>\n420.10<\/td>\n466.10<\/td>\nC25<\/td>\n373.88<\/td>\n2482.00<\/td>\n2758.00<\/td>\n3034.00<\/td>\n2481.00<\/td>\n2370.00<\/td>\n2632.00<\/td>\n2894.00<\/td>\n2369.00<\/td>\n<\/tr>\n
                  1400<\/td>\n1462<\/td>\n279.30<\/td>\n<\/td>\n547.20<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n3563.00<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                  ductile iron pipe\u00a0Mechanical property<\/h2>\n\n\n\n\n\n\n\n\n\n
                  Mechanical Property<\/td>\n<\/tr>\n
                  Nominal Diameter<\/td>\nHydraulic test<\/td>\nTensile strength<\/td>\nElogation<\/td>\nYield strength<\/td>\nBending strength<\/td>\nBrinell hardness<\/td>\nThickness of cement lining<\/td>\n<\/tr>\n
                  DN(MM)<\/td>\nMpa<\/td>\nMpa<\/td>\n%<\/td>\nMpa<\/td>\nMpa<\/td>\nHB<\/td>\nmm<\/td>\n<\/tr>\n
                  DN80-DN300<\/td>\n5<\/td>\n\u2265420<\/td>\n\u226510<\/td>\n\u2265300<\/td>\n\u2265590<\/td>\n\u2264230<\/td>\n3<\/td>\n<\/tr>\n
                  DN350-DN600<\/td>\n4<\/td>\n\u2265420<\/td>\n\u226510<\/td>\n\u2265300<\/td>\n\u2265590<\/td>\n\u2264230<\/td>\n5<\/td>\n<\/tr>\n
                  DN700-DN1000<\/td>\n3.2<\/td>\n\u2265420<\/td>\n\u226510<\/td>\n\u2265300<\/td>\n\u2265590<\/td>\n\u2264230<\/td>\n6<\/td>\n<\/tr>\n
                  DN1100-DN1600<\/td>\n2.5<\/td>\n\u2265420<\/td>\n\u22657<\/td>\n\u2265300<\/td>\n\u2265590<\/td>\n\u2264230<\/td>\n\u2026..<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":2022,"template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"tags":[],"products":[10],"class_list":["post-2021","product","type-product","status-publish","has-post-thumbnail","hentry","products-ductile-iron-pipes"],"acf":[],"yoast_head":"\nClass 250 ductile iron pipe suppliers - Jingang LuoKaiwei<\/title>\n<meta name=\"description\" content=\"Class 250 ductile iron pipe\u2014250 psi working pressure, 100 psi surge, 100+ year lifespan, push-on\/mechanical\/restrained\/flanged joints, ANSI\/AWWA C150, C104 & ISO 2531 compliant. 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