{"id":1926,"date":"2025-04-23T15:41:49","date_gmt":"2025-04-23T07:41:49","guid":{"rendered":"https:\/\/www.ductileironsuppliers.com\/?post_type=product&p=1926"},"modified":"2025-04-23T15:41:49","modified_gmt":"2025-04-23T07:41:49","slug":"class-k9-dn450-ductile-iron-pipe-suppliers","status":"publish","type":"product","link":"https:\/\/www.ductileironsuppliers.com\/ar\/product\/class-k9-dn450-ductile-iron-pipe-suppliers","title":{"rendered":"\u0645\u0648\u0631\u0651\u062f\u0648 \u0623\u0646\u0627\u0628\u064a\u0628 \u062d\u062f\u064a\u062f \u0627\u0644\u062f\u0643\u062a\u0627\u064a\u0644 \u0645\u0646 \u0627\u0644\u0641\u0626\u0629 K9 DN450"},"content":{"rendered":"

Class K9 DN450 ductile iron pipe combines optimal strength and durability with ease of installation and long-term cost efficiency. With a nominal wall thickness of approximately 8.55 mm<\/strong> (T = 9 \u00d7 (0.5 + 0.001 \u00d7 450)) and a design pressure of 9 bar<\/strong>, it reliably serves high-pressure water and wastewater systems for 100 + years<\/strong> with minimal maintenance. Its push-on, mechanical, restrained, and ball-and-socket joints<\/strong>, plus trenchless installation options (HDD, microtunneling), allow rapid, flexible deployment in congested or sensitive environments. Priced competitively at USD 460\u2013560 per ton<\/strong>, it strikes the ideal balance between cost and performance compared to Class K7, K8, and K12 alternatives. Fully compliant with ISO 2531<\/strong>, EN 545\/598<\/strong>, AWWA C151\/A21.51<\/strong>, and related standards, Class K9 DN450 ensures global interoperability and peace of mind .<\/p>\n

Application Scenarios<\/h2>\n

Ductile iron\u2019s mechanical properties and corrosion protection make it ideal for:<\/p>\n

    \n
  • \n

    Potable water transmission & distribution<\/strong> (mains, treatment-plant interconnects)<\/p>\n<\/li>\n

  • \n

    Wastewater & stormwater conveyance<\/strong> (gravity sewers, drainage, buried applications)<\/p>\n<\/li>\n

  • \n

    Industrial & irrigation systems<\/strong> (power plants, refineries, agricultural networks)<\/p>\n<\/li>\n

  • \n

    Subaqueous & trenchless crossings<\/strong> via HDD or microtunneling under rivers, highways, and railways<\/p>\n<\/li>\n

  • \n

    Sewer rehabilitation<\/strong> when chemical or abrasive sludges are present<\/p>\n<\/li>\n<\/ul>\n

    Service Life<\/h2>\n

    Modern ductile iron pipe endures over a century with:<\/p>\n

      \n
    • \n

      Internal cement-mortar lining<\/strong> resisting corrosion and biofouling<\/p>\n<\/li>\n

    • \n

      External zinc-bitumen or polyethylene coatings<\/strong> per ISO 8179 protecting against aggressive soils<\/p>\n<\/li>\n

    • \n

      \u2265 80 % recycled content<\/strong> and full recyclability for environmental sustainability<\/p>\n<\/li>\n<\/ul>\n

      Installation and Jointing<\/h2>\n

      Class K9 DN450 supports multiple joint systems:<\/p>\n

        \n
      • \n

        Push-on joints<\/strong> for fast, simple assembly without thrust blocks<\/p>\n<\/li>\n

      • \n

        Mechanical (Tyton\u00ae) & restrained (Tyton SIT PLUS\u00ae) joints<\/strong> eliminating concrete thrust blocks<\/p>\n<\/li>\n

      • \n

        Boltless ball-and-socket joints<\/strong> permitting angular deflections up to 15\u00b0 for alignment flexibility<\/p>\n<\/li>\n

      • \n

        Trenchless methods<\/strong> (HDD, microtunneling) with tension-locked spigots for minimal surface impact<\/p>\n<\/li>\n<\/ul>\n

        Product Series Comparison and Pricing<\/h2>\n
        \n

         <\/p>\n

        \n\n\n\n\n\n\n\n\n
        Class<\/th>\nDesign Pressure<\/th>\nWall Thickness (DN 450)<\/th>\nPrice\/Ton (USD)<\/th>\nIdeal Use Case<\/th>\n<\/tr>\n<\/thead>\n
        K7<\/strong><\/td>\n7 bar<\/td>\n\u2248 6.65 mm<\/td>\n460\u2013560<\/td>\nLow-pressure distribution<\/td>\n<\/tr>\n
        K8<\/strong><\/td>\n8 bar<\/td>\n\u2248 7.60 mm<\/td>\n460\u2013560<\/td>\nMedium-pressure mains<\/td>\n<\/tr>\n
        K9<\/strong><\/td>\n9 bar<\/td>\n\u2248 8.55 mm<\/td>\n460\u2013560<\/td>\nStandard high-pressure lines<\/td>\n<\/tr>\n
        K12<\/strong><\/td>\n12 bar<\/td>\n\u2248 11.40 mm<\/td>\n460\u2013560<\/td>\nTransmission & high-head<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

        (T = K \u00d7 (0.5 + 0.001 \u00d7 D), D = 450 mm, K = class)<\/em><\/p>\n

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

          ISO 2531:2009 \/ ISO 8180<\/strong> \u2013 Pipes, fittings, accessories.<\/p>\n<\/li>\n

        • \n

          EN 545 & EN 598<\/strong> \u2013 Drinking-water and sewer mains.<\/p>\n<\/li>\n

        • \n

          AWWA C151\/A21.51 & C110\/A21.10<\/strong> \u2013 U.S. potable-water applications.<\/p>\n<\/li>\n

        • \n

          ISO 4179<\/strong> \u2013 Internal cement-mortar lining.<\/p>\n<\/li>\n

        • \n

          ISO 8179<\/strong> \u2013 External protective coatings.<\/p>\n<\/li>\n<\/ul>\n

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

            High strength & ductility<\/strong> (tensile \u2265 400 MPa, elongation \u2265 10 %).<\/p>\n<\/li>\n

          • \n

            Corrosion resistance<\/strong> via dual linings\/coatings for long-term performance.<\/p>\n<\/li>\n

          • \n

            Rapid, flexible installation<\/strong> with modular joints and trenchless options.<\/p>\n<\/li>\n

          • \n

            Century-plus lifespan<\/strong> supported by extensive field data.<\/p>\n<\/li>\n

          • \n

            Lifecycle cost savings<\/strong> through reduced maintenance and energy use.<\/p>\n<\/li>\n<\/ul>\n

            FAQ<\/h2>\n

            Q1: Can Class K9 pipe withstand seismic events?<\/strong>
            A1: Yes\u2014rubber-ring (EPDM) gaskets and restrained-joint designs accommodate ground movement without leakage.
            Q2: What coating options exist?<\/strong>
            A2: Standard zinc-bitumen; optional polyethylene encasement, epoxy, or polyurethane.
            Q3: How are leak-tight joints ensured?<\/strong>
            A3: Precision-cast bells, EPDM\/SBR gaskets, and restrained systems guarantee a reliable seal.
            Q4: Are fittings and valves standardized?<\/strong>
            A4: Yes\u2014compatible with ISO 2531, EN 545 dimensions, and AWWA C110 flanges.<\/p>\n

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

              Lafayette, LA HDD crossings:<\/strong> Three successful HDD pulls (1,140 ft, 940 ft, 740 ft) using K9 ductile iron pipe demonstrated minimal disruption, cost savings, and rapid installation.<\/p>\n<\/li>\n

            • \n

              Aurora, CO water infrastructure:<\/strong> Aurora Water chose ductile iron for high-cyclic loading zones; the durable pipes met pumping-cycle stresses with zero failures over 15 years.<\/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":1927,"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-1926","product","type-product","status-publish","has-post-thumbnail","hentry","products-ductile-iron-pipes"],"acf":[],"yoast_head":"\nClass K9 DN450 ductile iron pipe suppliers - Jingang LuoKaiwei<\/title>\n<meta name=\"description\" content=\"Explore Class K9 DN450 ductile iron pipe: 8.55 mm wall, 9 bar rating, 100+ year lifespan, ISO 2531\/EN 545 compliance, K7\u2013K12 comparison, installation methods, advantages, FAQs & real-world case studies.\" \/>\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.ductileironsuppliers.com\/ar\/product\/class-k9-dn450-ductile-iron-pipe-suppliers\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Class K9 DN450 ductile iron pipe suppliers - Jingang LuoKaiwei\" \/>\n<meta property=\"og:description\" content=\"Explore Class K9 DN450 ductile iron pipe: 8.55 mm wall, 9 bar rating, 100+ year lifespan, ISO 2531\/EN 545 compliance, K7\u2013K12 comparison, installation methods, advantages, FAQs & real-world case studies.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ductileironsuppliers.com\/ar\/product\/class-k9-dn450-ductile-iron-pipe-suppliers\/\" \/>\n<meta property=\"og:site_name\" content=\"Jingang LuoKaiwei\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ductileironsuppliers.com\/wp-content\/uploads\/2025\/04\/ttoj6-5uiad.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"595\" \/>\n\t<meta property=\"og:image:height\" content=\"503\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.ductileironsuppliers.com\\\/product\\\/class-k9-dn450-ductile-iron-pipe-suppliers\",\"url\":\"https:\\\/\\\/www.ductileironsuppliers.com\\\/product\\\/class-k9-dn450-ductile-iron-pipe-suppliers\",\"name\":\"Class K9 DN450 ductile iron pipe suppliers - 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