{"id":1820,"date":"2025-04-21T13:57:48","date_gmt":"2025-04-21T05:57:48","guid":{"rendered":"https:\/\/www.ductileironsuppliers.com\/?post_type=product&p=1820"},"modified":"2025-04-21T14:16:15","modified_gmt":"2025-04-21T06:16:15","slug":"class-k7-dn80-ductile-iron-pipe-suppliers","status":"publish","type":"product","link":"https:\/\/www.ductileironsuppliers.com\/ar\/product\/class-k7-dn80-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 K7 DN80"},"content":{"rendered":"

The\u00a0K7 Class DN80<\/strong>\u00a0ductile iron pipe is a robust water-conveyance solution, engineered to withstand pressures of up to 7 bar. With a nominal diameter of 80 mm and a minimum tensile strength of 420 MPa, it offers both structural resilience and flexibility in varying soil conditions.<\/p>\n

Application Scenarios<\/h2>\n

Municipal drinking\u2011water mains and raw\u2011water supply lines leverage Class K7 DN80 pipes for reliable pressure management and minimal leakage risks. Industrial facilities\u2014such as power plants and chemical processing units\u2014benefit from their chemical resistance and mechanical strength. In agriculture, they serve as irrigation mains, withstanding soil shifts and seasonal temperature variations without cracking.<\/p>\n

Service Life<\/h2>\n

Modern ductile iron pipes routinely surpass a century of service under typical operating conditions, with documented cases of over 100 years in continuous use. Utilities like Monte\u00a0Vista Water District report valuing DI mains at 100\u2013125\u00a0years of functional life, far outpacing alternative materials and minimizing replacement costs over decades.<\/p>\n

Installation and Connection<\/h2>\n
    \n
  • \n

    Joint Methods<\/strong>: T\u2011type, mechanical\u2011joint and self\u2011anchored couplings accommodate various trench geometries and thrust conditions.<\/p>\n<\/li>\n

  • \n

    Polyethylene Encasement<\/strong>:<\/p>\n

      \n
    • \n

      Method\u00a0A<\/em> (preferred): continuous PE sleeve overlapped at joints.<\/p>\n<\/li>\n

    • \n

      Method\u00a0B<\/em>: separate PE for barrel and joint areas (requires extra wrap for bolts).<\/p>\n<\/li>\n

    • \n

      Method\u00a0C<\/em>: similar to A with additional joint coverage.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

    • \n

      Trenching & Bedding<\/strong>: Pipes rest on well\u2011graded bedding; backfill compaction must meet local standards to prevent settlement.<\/p>\n<\/li>\n<\/ul>\n

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

        ISO\u00a02531:2009<\/strong> \u2014 materials, dimensions, tolerances, mechanical properties, coatings.<\/p>\n<\/li>\n

      • \n

        EN\u00a0545 \/ EN\u00a0598<\/strong> \u2014 European requirements for water pipelines.<\/p>\n<\/li>\n

      • \n

        ANSI\/AWWA\u00a0C151<\/strong> \u2014 American standard for ductile\u2011iron pipes.<\/p>\n<\/li>\n

      • \n

        Certifications<\/strong>: ISO 9001, ISO 14001, SGS, NSF, WRAS ensure quality management, environmental compliance, and potability.<\/p>\n<\/li>\n<\/ul>\n

        Price Comparison with Other Series<\/h2>\n
        \n
        \n\n\n\n\n\n\n\n
        Class<\/th>\nChina (USD\u00a0\/\u00a0m)<\/th>\nIndia (USD\u00a0\/\u00a0m)<\/th>\n<\/tr>\n<\/thead>\n
        K7<\/strong><\/td>\n425 \u2013 500<\/td>\n450\u00a0\u2013\u00a0550<\/td>\n<\/tr>\n
        K8<\/strong><\/td>\n480 \u2013 600<\/td>\n550 \u2013 600<\/td>\n<\/tr>\n
        K9<\/strong><\/td>\n600\u00a0\u2013\u00a0720<\/td>\n600 \u2013 650<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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

          Superior Corrosion Resistance<\/strong>: Epoxy, bitumen or zinc\u2011aluminum coatings plus cement mortar lining thwart internal and external corrosion.<\/p>\n<\/li>\n

        • \n

          Flexibility & Toughness<\/strong>: Ductility reduces cracking under soil movement and seismic events.<\/p>\n<\/li>\n

        • \n

          Low Maintenance<\/strong>: Insusceptible to rot, insects, freeze\u2013thaw cycles; lifecycle costs remain low amid rising energy budgets.<\/p>\n<\/li>\n

        • \n

          Recyclability<\/strong>: 100% recyclable iron content aligns with circular\u2011economy goals.<\/p>\n<\/li>\n<\/ul>\n

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

            What does DN80 mean?<\/strong>
            Nominal Diameter 80 mm; internal bore \u2248 80 mm under ISO 2531 tolerance.<\/p>\n<\/li>\n

          2. \n

            What is Class\u00a0K7?<\/strong>
            Pressure class rated for 7 bar working pressure; tensile strength \u2265420 MPa.<\/p>\n<\/li>\n

          3. \n

            How long will the pipe last?<\/strong>
            Expectation exceeds 100 years in potable\u2011water service.<\/p>\n<\/li>\n

          4. \n

            Can these pipes be installed above ground?<\/strong>
            Yes\u2014coatings and lining options support above\u2011 and below\u2011ground installations.<\/p>\n<\/li>\n

          5. \n

            Is ductile iron environmentally friendly?<\/strong>
            Fully recyclable and often produced with high recycled\u2011content scrap.<\/p>\n<\/li>\n<\/ol>\n

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

              Municipal Longevity<\/strong>: Monte Vista Water District credits DI mains with delivering 100\u2013125 years of value, far outlasting PVC and other alternatives.<\/p>\n<\/li>\n

            • \n

              Utility Success Stories<\/strong>: DIPRA\u2019s repository showcases projects in diverse climates\u2014demonstrating reduced leak rates, easy maintenance, and cost predictability in cities worldwide.<\/p>\n<\/li>\n

            • \n

              Risk Mitigation<\/strong>: Historic cast\u2011iron failures (e.g., 90\u2011year CI main break) underscore the need for ductile\u2011iron upgrades to ensure continuous service under extreme conditions.<\/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":1821,"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-1820","product","type-product","status-publish","has-post-thumbnail","hentry","products-ductile-iron-pipes"],"acf":[],"yoast_head":"\nClass K7 DN80 mm ductile iron pipe suppliers - Jingang LuoKaiwei<\/title>\n<meta name=\"description\" content=\"The\u00a0K7 Class DN80\u00a0ductile iron pipe is a robust water-conveyance solution, engineered to withstand pressures of up to 7 bar. 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