{"id":1875,"date":"2025-04-22T17:41:37","date_gmt":"2025-04-22T09:41:37","guid":{"rendered":"https:\/\/www.ductileironsuppliers.com\/?post_type=product&p=1875"},"modified":"2025-04-22T17:41:37","modified_gmt":"2025-04-22T09:41:37","slug":"class-k8-dn500-ductile-iron-pipe-suppliers","status":"publish","type":"product","link":"https:\/\/www.ductileironsuppliers.com\/ar\/product\/class-k8-dn500-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 K8 DN500"},"content":{"rendered":"

Class\u00a0K8\u00a0DN500 ductile iron pipe has a nominal wall thickness of 8.0\u00a0mm<\/strong>, calculated per ISO\u00a02531\u2019s formula e\u00a0= K\u00a0\u00d7\u00a0(0.5\u00a0+\u00a00.001\u00a0\u00d7\u00a0DN)<\/em> (K\u00a0=\u00a08, DN\u00a0=\u00a0500\u00a0mm) . It is rated PN\u00a012.5 (1.25\u00a0MPa)<\/strong> for medium\u2011pressure water, gas and fire mains . With cement\u2011mortar lining and optional loose\u2011fit polyethylene encasement, its design life exceeds 100\u00a0years<\/strong>, reaching up to 110\u00a0years<\/strong> under severe soil conditions . Installation uses push\u2011on (\u201cTyton\u201d), mechanical and flanged joints conforming to ISO 2531, AWWA C111 and ANSI B16.1 standards. In the K\u2011series, wall thickness climbs from 7.0\u00a0mm (K7)<\/strong> to 8.0\u00a0mm (K8)<\/strong> to 9.0\u00a0mm (K9)<\/strong> to 12.0\u00a0mm (K12)<\/strong>, with prices ranging USD\u00a0480\u2013600<\/strong> \/\u00a0ton for K8, reflecting its cost\u2011performance balance.<\/p>\n

Applications<\/h2>\n

Potable Water Distribution<\/strong>
K8\u00a0DN500 pipes form the backbone of large municipal mains, delivering stable hydraulic performance with minimal leakage .<\/p>\n

Sewage & Drainage<\/strong>
Abrasion\u2011resistant ductile iron and smooth cement\u2011mortar lining handle grit\u2011laden wastewater in gravity or pressure sewers .<\/p>\n

Irrigation Systems<\/strong>
Uniform flow and surge resilience support agricultural and landscape irrigation networks under variable demands .<\/p>\n

Gas Distribution<\/strong>
When produced and tested per EN\u00a0969 with external coatings, K8\u00a0DN500 safely conveys natural gas up to 16\u00a0bar .<\/p>\n

Fire\u2011Protection Mains<\/strong>
High ductility and surge capacity ensure reliable hydrant loops and feeder mains for fire suppression systems .<\/p>\n

Service Life<\/h2>\n

Modern ductile iron pipe is proven to last 100+\u00a0years<\/strong> in benign soils, thanks to its high\u2011strength matrix and cement linings .
Loose\u2011fit polyethylene sleeving per ISO\u00a08180 extends life to 110\u00a0years<\/strong> even in aggressive soils, as confirmed by DIPRA test sites .
A lifecycle cost analysis by AWWA shows that ductile iron mains reduce total system costs\u2014including pumping energy and maintenance\u2014by millions over 50\u00a0years compared to alternatives .<\/p>\n

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

    Push\u2011On (\u201cTyton\u201d) Joints<\/strong>: Spigot\u2011socket assembly with elastomeric gasket for rapid, bolt\u2011free sealing per ISO\u00a02531 .<\/p>\n<\/li>\n

  • \n

    Mechanical Joints<\/strong>: Gland\u2011and\u2011bolt restraint for fittings and valves, meeting AWWA C111 dimensions for DN 80\u2013600 mm .<\/p>\n<\/li>\n

  • \n

    Flanged Joints<\/strong>: ANSI\u00a0B16.1 or EN\u00a01092 flanges enable easy disassembly and high axial\u2011load resistance .<\/p>\n<\/li>\n

  • \n

    Best Practices<\/strong>: Proper trench bedding, \u22643\u00a0% deflection, hydrostatic testing and chlorination per ISO\u00a02531\/AWWA\u00a0C600 maximize pipeline integrity .<\/p>\n<\/li>\n<\/ul>\n

    K\u2011Series Comparison & Pricing<\/h2>\n
    \n

     <\/p>\n

    \n\n\n\n\n\n\n\n\n
    Class<\/th>\nWall Thickness<br>(e = K\u00b7(0.5\u00a0+\u00a00.001\u00b7DN))<\/th>\nPressure Rating<\/th>\nPrice (USD\/ton)<\/th>\n<\/tr>\n<\/thead>\n
    K7<\/strong><\/td>\n7\u00a0\u00d7\u00a0(0.5+0.001\u00d7500) = 7.0\u00a0mm<\/td>\nPN\u00a010 (1.0\u00a0MPa)<\/td>\n$450\u2013500<\/td>\n<\/tr>\n
    K8<\/strong><\/td>\n8\u00a0\u00d7\u00a0(0.5+0.001\u00d7500) = 8.0\u00a0mm<\/td>\nPN\u00a012.5 (1.25\u00a0MPa)<\/td>\n$480\u2013600<\/td>\n<\/tr>\n
    K9<\/strong><\/td>\n9\u00a0\u00d7\u00a0(0.5+0.001\u00d7500) = 9.0\u00a0mm<\/td>\nPN\u00a016 (1.6\u00a0MPa)<\/td>\n$550\u2013650<\/td>\n<\/tr>\n
    K12<\/strong><\/td>\n12\u00a0\u00d7\u00a0(0.5+0.001\u00d7500) = 12.0\u00a0mm<\/td>\nPN\u00a025 (2.5\u00a0MPa)<\/td>\n$700\u2013900<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    Thickness formula per ISO\u00a02531 . Prices from global market surveys (Alibaba, Made\u2011in\u2011China) .<\/p>\n<\/blockquote>\n

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

      ISO\u00a02531:2009<\/strong> \u2013 Pipe dimensions, linings & joint performance.<\/p>\n<\/li>\n

    • \n

      GB\/T\u00a013295\u20112019<\/strong> \u2013 Chinese national standard for DIP, fittings & joints.<\/p>\n<\/li>\n

    • \n

      ISO\u00a08180<\/strong> \u2013 Polyethylene encasement for external corrosion control.<\/p>\n<\/li>\n

    • \n

      AWWA\u00a0C111\/A21.11<\/strong> \u2013 Mechanical\u2011joint dimensions for DN 80\u2013600 mm.<\/p>\n<\/li>\n

    • \n

      ANSI\u00a0B16.1<\/strong> \u2013 Flanged\u2011joint dimensions & ratings.<\/p>\n<\/li>\n

    • \n

      EN\u00a0969:2009<\/strong> \u2013 Requirements for gas\u2011pipeline DI pipe & fittings.<\/p>\n<\/li>\n

    • \n

      ISO\u00a01083<\/strong> \u2013 Ductile iron material grades (tensile \u2265 420 MPa) .<\/p>\n<\/li>\n<\/ul>\n

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

        Exceptional Longevity:<\/strong> 100+ year design life minimizes replacements.<\/p>\n<\/li>\n

      • \n

        High Strength & Toughness:<\/strong> Tensile strength \u2265 420 MPa resists surges & external loads.<\/p>\n<\/li>\n

      • \n

        Superior Corrosion Control:<\/strong> Cement\u2011mortar lining, zinc\/bitumen coatings + LPS.<\/p>\n<\/li>\n

      • \n

        Versatile Jointing:<\/strong> Push\u2011on, mechanical, flanged & restrained systems.<\/p>\n<\/li>\n

      • \n

        Sustainability:<\/strong> Recycled feedstock, fully recyclable, lower life\u2011cycle energy than plastics.<\/p>\n<\/li>\n<\/ul>\n

        FAQ<\/h2>\n

        Q1: How do K classes differ?<\/strong>
        They follow e\u00a0=\u00a0K\u00b7(0.5\u00a0+\u00a00.001\u00a0DN)<\/em>\u2014for DN 500, K7=7.0 mm, K8=8.0 mm, K9=9.0 mm, K12=12.0 mm, matching PN 10\/12.5\/16\/25 respectively .<\/p>\n

        Q2: Which joint type is best?<\/strong>
        \u2013 Push\u2011on<\/strong> for speed; Mechanical<\/strong> for restraint; Flanged<\/strong> for maintenance access and axial loads .<\/p>\n

        Q3: Do I need polyethylene sleeving?<\/strong>
        Recommended in aggressive soils for up to 110\u00a0years life; proven by DIPRA Logandale tests .<\/p>\n

        Q4: What sizes & lengths are available?<\/strong>
        DN\u00a080\u20132600\u00a0mm, standard 6\u00a0m laying lengths (5.7\u00a0m for containers), custom cuts on demand .<\/p>\n

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

          AWWA Lifecycle Analysis:<\/strong> A 24\u2033 (DN600) pipeline evaluation showed ductile iron\u2019s lowest total cost over 50\u00a0years, factoring design, O&M, energy and salvage value .<\/p>\n<\/li>\n

        • \n

          DIPRA Poly Encasement Tests:<\/strong> HDPE\u2011sleeved pipes at Logandale, NV, remained in \u201cexcellent\u201d condition after decades in corrosive soils .<\/p>\n<\/li>\n

        • \n

          Energy & Cost Savings:<\/strong> A Journal AWWA study found ductile iron mains save utilities millions in energy and maintenance versus alternative materials.<\/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":1876,"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-1875","product","type-product","status-publish","has-post-thumbnail","hentry","products-ductile-iron-pipes"],"acf":[],"yoast_head":"\nClass K8 DN500 ductile iron pipe suppliers - 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