{"id":1934,"date":"2025-04-23T16:23:08","date_gmt":"2025-04-23T08:23:08","guid":{"rendered":"https:\/\/www.ductileironsuppliers.com\/?post_type=product&p=1934"},"modified":"2025-04-23T16:23:26","modified_gmt":"2025-04-23T08:23:26","slug":"class-k9-dn800-ductile-iron-pipe-suppliers","status":"publish","type":"product","link":"https:\/\/www.ductileironsuppliers.com\/ar\/product\/class-k9-dn800-ductile-iron-pipe-suppliers","title":{"rendered":"\u0645\u0648\u0631\u0650\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 DN800"},"content":{"rendered":"

Class K9 DN800 ductile iron pipe offers PN 25<\/strong> (2.5 MPa) nominal pressure, 11.7 mm<\/strong> nominal wall thickness, and a design life exceeding 100 years<\/strong> in benign soils\u2014making it ideal for critical water, sewage, and industrial networks. Installation flexibility comes via T-type push-on<\/strong>, K-type restrained<\/strong>, and self-restrained<\/strong> joints for rapid, leak-free connections across DN 80\u20131600 mm. Compared to K7, K8, and K12, K9 balances cost and durability (480\u2013650 USD\/m), while meeting ISO 2531<\/strong>, EN 545<\/strong>, EN 598<\/strong>, ISO 4179<\/strong>, and ISO 8179<\/strong> standards for global compatibility.<\/p>\n

Application Scenarios<\/h2>\n

Ductile iron Class K9 DN800 is used for:<\/p>\n

    \n
  • \n

    Potable & recycled water supply<\/strong> in urban and industrial networks.<\/p>\n<\/li>\n

  • \n

    Irrigation & raw water<\/strong> mains in agriculture and mining.<\/p>\n<\/li>\n

  • \n

    Gravity & sewer rising mains<\/strong>, and stormwater drainage<\/strong> systems.<\/p>\n<\/li>\n

  • \n

    Fire-fighting mains<\/strong> (hydrants & sprinklers) requiring high surge resistance.<\/p>\n<\/li>\n<\/ul>\n

    Its DN 800 size provides high flow with low head loss over long distances, ideal for large-scale distribution and process conveyance.<\/p>\n

    Service Life<\/h2>\n
      \n
    • \n

      100+ years<\/strong> design life in benign soils, proven by field and lab data.<\/p>\n<\/li>\n

    • \n

      50\u201380 years<\/strong> in aggressive soils with zinc\/epoxy coatings, cement-mortar lining, or LPS sleeving.<\/p>\n<\/li>\n

    • \n

      Recyclable<\/strong> at end-of-life; high recycled iron content reduces environmental impact.<\/p>\n<\/li>\n<\/ul>\n

      Life-cycle studies show ductile iron\u2019s total cost of ownership is among the lowest across pipe materials.<\/p>\n

      Installation & Connections<\/h2>\n

      T-Type Push-On (Tyton) Joints<\/h3>\n
        \n
      • \n

        Gasketed, quick-assemble \u201cT-type\u201d joints for DN 80\u20132000 mm.<\/p>\n<\/li>\n

      • \n

        Internal cement lining (ISO 4179) and external zinc + bitumen coating (ISO 8179).<\/p>\n<\/li>\n<\/ul>\n

        K-Type Restrained Joints<\/h3>\n
          \n
        • \n

          Mechanical restraint for DN 1200\u20132600 mm; axial thrust lock for surge protection.<\/p>\n<\/li>\n

        • \n

          Suitable for pre-test before backfill; zero-leak performance under vacuum\/surge.<\/p>\n<\/li>\n<\/ul>\n

          Self-Restrained Joints<\/h3>\n
            \n
          • \n

            Restraint harnesses clamp socket and spigot to prevent joint separation up to PN 16.<\/p>\n<\/li>\n

          • \n

            Complying with ISO 2531\/EN 545; suitable for DN 80\u20131600 mm installations.<\/p>\n<\/li>\n<\/ul>\n

            Series Comparison & Price<\/h2>\n

            For DN 800, the K-classes differ as follows:<\/p>\n

            \n

             <\/p>\n

            \n\n\n\n\n\n\n\n\n
            Class<\/th>\nWall Thickness (mm)<\/th>\nPressure Class (PN)<\/th>\nPrice (USD\/m)<\/th>\n<\/tr>\n<\/thead>\n
            K7<\/td>\n9.1 (t = 7\u00d71.3)<\/td>\nPN 10<\/td>\n370 \u2013 430<\/td>\n<\/tr>\n
            K8<\/td>\n10.4 (t = 8\u00d71.3)<\/td>\nPN 16<\/td>\n400 \u2013 500<\/td>\n<\/tr>\n
            K9<\/td>\n11.7 (t = 9\u00d71.3)<\/td>\nPN 25<\/td>\n480 \u2013 650<\/td>\n<\/tr>\n
            K12<\/td>\n15.6 (t = 12\u00d71.3)<\/td>\nPN 40<\/td>\ntypically 25% \u2191 over K9*<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

            *Exact K12 pricing upon request; premiums reflect thicker walls and higher testing pressures.<\/p>\n

            Thicker walls increase impact strength and surge resistance but at higher material cost.<\/p>\n

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

              ISO 2531:2009<\/strong> \u2013 Ductile iron pipes, fittings, accessories & joints for water.<\/p>\n<\/li>\n

            • \n

              EN 545 \/ EN 598<\/strong> \u2013 European water & sewerage requirements.<\/p>\n<\/li>\n

            • \n

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

            • \n

              ISO 8179<\/strong> \u2013 External zinc + bitumen coating.<\/p>\n<\/li>\n

            • \n

              ISO 21053<\/strong> \u2013 Life-cycle analysis & sustainability for ductile iron pipes.<\/p>\n<\/li>\n<\/ul>\n

              Compliance ensures global interoperability and procurement ease.<\/p>\n

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

                High Tensile Strength & Ductility<\/strong> withstands surge pressures & ground movements.<\/p>\n<\/li>\n

              • \n

                Long-Term Corrosion Resistance<\/strong> via multi-layer linings & coatings.<\/p>\n<\/li>\n

              • \n

                Fast, Leak-Free Installation<\/strong> reduces labor & downtime.<\/p>\n<\/li>\n

              • \n

                Environmentally Sustainable<\/strong>: recycled content, fully recyclable.<\/p>\n<\/li>\n

              • \n

                Proven Reliability<\/strong> in critical infrastructure worldwide.<\/p>\n<\/li>\n<\/ul>\n

                FAQ<\/h2>\n
                  \n
                1. \n

                  What wall thickness does Class K9 DN800 have?<\/strong>
                  Nominal thickness = 9 \u00d7 (0.5 + 0.001\u00d7800) = 11.7 mm.<\/p>\n<\/li>\n

                2. \n

                  Can it handle fire-fighting pressure?<\/strong>
                  Yes\u2014PN 25 rating (2.5 MPa), tested to 3.5 MPa for site tests.<\/p>\n<\/li>\n

                3. \n

                  How long will DN800 K9 last?<\/strong><\/p>\n

                  100 years in benign soils; up to 150 years with advanced coatings in aggressive environments.<\/p>\n<\/li>\n

                4. \n

                  Which joint suits high-rise and surge-prone systems?<\/strong>
                  K-type restrained joints provide axial restraint and leak-proof service.<\/p>\n<\/li>\n

                5. \n

                  Is DN800 K9 potable-water approved?<\/strong>
                  Yes\u2014internal cement lining meets ISO 4179; external coatings comply with ISO 8179; EN 545 certified.<\/p>\n<\/li>\n<\/ol>\n

                  Case Studies<\/h2>\n

                  N\u00eemes M\u00e9tropole (France)<\/strong>
                  Two DN800 UltraGrip\u00ae Amplified flange adaptors were installed on a potable water network upgrade. Installers praised the ease of handling, wide tolerance fit, and zero-leak performance, even under reducers and gate valves.<\/p>\n

                  Municipal Water Supply Upgrade (Asia)<\/strong>
                  A city replaced aging mains with DN800 K9 pipe, resulting in 30% fewer maintenance calls, improved pressure stability, and lifecycle cost savings of 20% over alternatives.<\/p>\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":1935,"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 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