Class K8 DN150 ductile iron pipe offers medium\u2011pressure capability (PN12.5) with a nominal wall thickness of 5.20 mm, combining exceptional strength, corrosion protection and 100 + year life expectancy. It is widely used in potable water, sewage, irrigation, gas and fire\u2011protection mains, and installs quickly via push\u2011on, mechanical or flanged joints. In the K series, K7\u2192K8\u2192K9\u2192K12 increase in thickness and pressure rating (PN10\u219212.5\u219216\u219225), with prices ranging roughly from $480 to $900 USD\/ton depending on class and finish.<\/p>\n
Class\u00a0K8\u00a0DN150 pipe is engineered for:<\/p>\n
Potable Water Distribution<\/strong>: Reliable hydraulics and minimal leakage in urban networks.<\/p>\n<\/li>\n Sewage & Drainage<\/strong>: Abrasion\u2011resistant conveyance of wastewater under medium pressures.<\/p>\n<\/li>\n Irrigation Systems<\/strong>: Uniform flow in agricultural and horticultural applications.<\/p>\n<\/li>\n Gas Distribution<\/strong>: When coated and tested per ISO 8180 for external protection.<\/p>\n<\/li>\n Fire\u2011Protection Mains<\/strong>: High surge capacity and ductility for fire\u2011water networks.<\/p>\n<\/li>\n<\/ul>\n Modern ductile iron pipe is proven to exceed 100\u00a0years<\/strong> in benign soils; with cement\u2011mortar linings and advanced external coatings, life expectancy can reach 110\u00a0years<\/strong> under optimized conditions.Life\u2011cycle studies show present\u2011value savings in operating costs of over $17 million for a 50\u2011year service span using ductile iron versus alternatives.<\/p>\n Push\u2011On (\u201cTyton\u201d) Joints<\/strong>: Simple, bolt\u2011free assembly with resilient gasket sealing.<\/p>\n<\/li>\n Mechanical Joints<\/strong>: Gland\u2011and\u2011bolt restraint per ANSI\/AWWA C111 for fittings and valves.<\/p>\n<\/li>\n Flanged Joints<\/strong>: Removable connections per ANSI B16.1 or EN 1092 for maintenance access.<\/p>\n<\/li>\n<\/ul>\n <\/p>\n 1.Calculated per ISO 2531: e = K\u00d7(0.5 + 0.001 \u00d7 DN). GB\/T\u00a013295\u20112019<\/strong>: Pipes, fittings & joints for water\/gas (DN40\u2013DN3000).<\/p>\n<\/li>\n ISO\u00a02531:2009<\/strong> \/ EN\u00a0545:2006<\/strong>: Pipe dimensions, linings, joint performance.<\/p>\n<\/li>\n ISO\u00a08180:2020<\/strong>: Polyethylene sleeving for external corrosion control.<\/p>\n<\/li>\n ANSI\/AWWA C110\/C111\/C151<\/strong>: Flanged, mechanical joint & centrifugally cast pipe specs.<\/p>\n<\/li>\n<\/ul>\n Exceptional Longevity<\/strong>: 100 + year service life with minimal replacement.<\/p>\n<\/li>\n High Strength & Toughness<\/strong>: Tensile \u2265 420 MPa resists surge pressures.<\/p>\n<\/li>\n Comprehensive Corrosion Protection<\/strong>: Cement\u2011mortar lining, zinc\/bitumen coatings, polyethylene sleeving.<\/p>\n<\/li>\n Flexible Jointing Options<\/strong>: Push\u2011on, mechanical, flanged and restrained systems.<\/p>\n<\/li>\n Sustainability<\/strong>: Recyclable iron with lower life\u2011cycle energy versus thermoplastics.<\/p>\n<\/li>\n<\/ul>\n Q1: How do K classes differ?<\/strong> Q2: What lining & coating options exist?<\/strong> Q3: Can DIP be used in corrosive soils?<\/strong> Q4: What sizes & lengths are available?<\/strong> Huntsville, AL (Black &\u00a0Veatch)<\/strong>: 50\u2011year PV savings > $17 million in energy & maintenance by choosing ductile iron over alternatives.<\/p>\n<\/li>\n Florida Everglades Test Site (DIPRA)<\/strong>: Loose polyethylene sleeving kept DIP in \u201cexcellent\u201d condition after 10 years in aggressive soils.<\/p>\n<\/li>\n<\/ul>\nService Life<\/h2>\n
Installation & Connection<\/h2>\n
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Product Series Comparison<\/h2>\n
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\n \nClass<\/th>\n Nominal Wall Thickness<sup>1<\/sup><\/th>\n Pressure Rating<\/th>\n Typical Price<sup>2<\/sup> (USD\/ton)<\/th>\n<\/tr>\n<\/thead>\n \n K7<\/strong><\/td>\n 7\u00d7(0.5\u00a0+\u00a00.001\u00d7150)\u00a0=\u00a04.55\u00a0mm<\/td>\n PN10 (1.0\u00a0MPa)<\/td>\n $480\u00a0\u2013\u00a0650<\/td>\n<\/tr>\n \n K8<\/strong><\/td>\n 8\u00d7(0.5\u00a0+\u00a00.001\u00d7150)\u00a0=\u00a05.20\u00a0mm<\/td>\n PN12.5 (1.25\u00a0MPa)<\/td>\n $500\u00a0\u2013\u00a0700<\/td>\n<\/tr>\n \n K9<\/strong><\/td>\n 9\u00d7(0.5\u00a0+\u00a00.001\u00d7150)\u00a0=\u00a05.85\u00a0mm<\/td>\n PN16 (1.6\u00a0MPa)<\/td>\n $620\u00a0\u2013\u00a0680<\/td>\n<\/tr>\n \n K12<\/strong><\/td>\n 12\u00d7(0.5\u00a0+\u00a00.001\u00d7150)\u00a0=\u00a07.80\u00a0mm<\/td>\n PN25 (2.5\u00a0MPa)<\/td>\n $700 \u2013 900<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
2.Based on market surveys (Alibaba, Made\u2011in\u2011China) \u0167.<\/p>\nInternational Standards<\/h2>\n
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Advantages<\/h2>\n
\n
FAQ<\/h2>\n
They vary by nominal wall thickness (e=K\u00d7(0.5+0.001\u00d7DN)) and corresponding pressure rating: K7\u2192PN10, K8\u2192PN12.5, K9\u2192PN16, K12\u2192PN25.<\/p>\n
Internal cement\u2011mortar, epoxy or ceramic; external bitumen, zinc + finish, polyethylene sleeving per ISO 8180.<\/p>\n
Yes\u2014use polyethylene encasement or cathodic protection to achieve 100 + year life even in aggressive environments.<\/p>\n
DN 80\u20132600 mm, standard 6 m laying length (5.6\u20135.8 m effective) with custom cuts on demand.<\/p>\nCase Studies<\/h2>\n
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ductile iron pipe dimensions<\/h2>\n
\n\n
\n <\/td>\n <\/td>\n <\/td>\n Pipe body weight \uff08kg\/m)<\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n (Inside Diameter)<\/td>\n (Outside Diameter)<\/td>\n Socket Weight<\/td>\n K8<\/td>\n K9<\/td>\n K10<\/td>\n C class<\/td>\n Total weight of Active Length=6M (kg)<\/td>\n Total weight of Active Length=5.7M (kg)<\/td>\n<\/tr>\n \n DN(mm)<\/td>\n OD(mm)<\/td>\n \u2248 kg<\/td>\n Class<\/td>\n kg\/m<\/td>\n K8<\/td>\n K9<\/td>\n K10<\/td>\n C class<\/td>\n K8<\/td>\n K9<\/td>\n K10<\/td>\n C class<\/td>\n<\/tr>\n \n 80<\/td>\n 98<\/td>\n 3.40<\/td>\n 12.20<\/td>\n 12.20<\/td>\n 12.20<\/td>\n C40<\/td>\n 9.10<\/td>\n 77.00<\/td>\n 77.00<\/td>\n 77.00<\/td>\n 58.00<\/td>\n 73.00<\/td>\n 73.00<\/td>\n 73.00<\/td>\n 55.00<\/td>\n<\/tr>\n \n 100<\/td>\n 118<\/td>\n 4.30<\/td>\n 14.90<\/td>\n 15.10<\/td>\n 15.10<\/td>\n C40<\/td>\n 11.12<\/td>\n 93.70<\/td>\n 95.00<\/td>\n 95.00<\/td>\n 71.00<\/td>\n 90.00<\/td>\n 91.00<\/td>\n 90.00<\/td>\n 68.00<\/td>\n<\/tr>\n \n 125<\/td>\n 144<\/td>\n 5.70<\/td>\n <\/td>\n 18.90<\/td>\n <\/td>\n C40<\/td>\n <\/td>\n <\/td>\n 119.00<\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n 150<\/td>\n 170<\/td>\n 7.10<\/td>\n 21.80<\/td>\n 22.80<\/td>\n 22.80<\/td>\n C40<\/td>\n 16.48<\/td>\n 138.00<\/td>\n 144.00<\/td>\n 144.00<\/td>\n 106.00<\/td>\n 132.00<\/td>\n 138.00<\/td>\n 137.00<\/td>\n 101.00<\/td>\n<\/tr>\n \n 200<\/td>\n 222<\/td>\n 10.30<\/td>\n 28.70<\/td>\n 30.60<\/td>\n 30.60<\/td>\n C40<\/td>\n 22.62<\/td>\n 183.00<\/td>\n 194.00<\/td>\n 194.00<\/td>\n 146.00<\/td>\n 174.00<\/td>\n 185.00<\/td>\n 185.00<\/td>\n 139.00<\/td>\n<\/tr>\n \n 250<\/td>\n 274<\/td>\n 14.20<\/td>\n 35.60<\/td>\n 40.20<\/td>\n 44.30<\/td>\n C40<\/td>\n 32.63<\/td>\n 228.00<\/td>\n 255.00<\/td>\n 280.00<\/td>\n 210.00<\/td>\n 218.00<\/td>\n 244.00<\/td>\n 267.00<\/td>\n 200.00<\/td>\n<\/tr>\n \n 300<\/td>\n 326<\/td>\n 18.90<\/td>\n 45.30<\/td>\n 50.80<\/td>\n 56.30<\/td>\n C30<\/td>\n 43.90<\/td>\n 290.00<\/td>\n 323.00<\/td>\n 357.00<\/td>\n 282.00<\/td>\n 278.00<\/td>\n 309.00<\/td>\n 340.00<\/td>\n 269.00<\/td>\n<\/tr>\n \n 350<\/td>\n 378<\/td>\n 23.70<\/td>\n 55.90<\/td>\n 63.20<\/td>\n 69.60<\/td>\n C30<\/td>\n 51.88<\/td>\n 359.00<\/td>\n 403.00<\/td>\n 441.00<\/td>\n 335.00<\/td>\n 343.00<\/td>\n 384.00<\/td>\n 420.00<\/td>\n 319.00<\/td>\n<\/tr>\n \n 400<\/td>\n 429<\/td>\n 29.50<\/td>\n 67.30<\/td>\n 75.50<\/td>\n 83.70<\/td>\n C30<\/td>\n 60.78<\/td>\n 433.00<\/td>\n 482.00<\/td>\n 532.00<\/td>\n 394.00<\/td>\n 414.00<\/td>\n 460.00<\/td>\n 506.00<\/td>\n 376.00<\/td>\n<\/tr>\n \n 450<\/td>\n 480<\/td>\n 38.30<\/td>\n 80.00<\/td>\n 89.30<\/td>\n 99.00<\/td>\n C30<\/td>\n 73.30<\/td>\n 515.00<\/td>\n 575.00<\/td>\n 632.00<\/td>\n 472.00<\/td>\n 492.00<\/td>\n 550.00<\/td>\n 597.00<\/td>\n 450.00<\/td>\n<\/tr>\n \n 500<\/td>\n 532<\/td>\n 42.80<\/td>\n 92.80<\/td>\n 104.30<\/td>\n 115.60<\/td>\n C30<\/td>\n 87.20<\/td>\n 600.00<\/td>\n 669.00<\/td>\n 736.00<\/td>\n 566.00<\/td>\n 572.00<\/td>\n 638.00<\/td>\n 702.00<\/td>\n 540.00<\/td>\n<\/tr>\n \n 600<\/td>\n 635<\/td>\n 59.30<\/td>\n 122.00<\/td>\n 137.30<\/td>\n 152.00<\/td>\n C30<\/td>\n 120.62<\/td>\n 791.00<\/td>\n 882.00<\/td>\n 971.00<\/td>\n 783.00<\/td>\n 755.00<\/td>\n 842.00<\/td>\n 926.00<\/td>\n 747.00<\/td>\n<\/tr>\n \n 700<\/td>\n 738<\/td>\n 79.10<\/td>\n 155.00<\/td>\n 173.90<\/td>\n 193.00<\/td>\n C25<\/td>\n 142.15<\/td>\n 1009.00<\/td>\n 1123.00<\/td>\n 1237.00<\/td>\n 932.00<\/td>\n 963.00<\/td>\n 1071.00<\/td>\n 1179.00<\/td>\n 889.00<\/td>\n<\/tr>\n \n 800<\/td>\n 842<\/td>\n 102.60<\/td>\n 192.00<\/td>\n 215.20<\/td>\n 239.00<\/td>\n C25<\/td>\n 177.07<\/td>\n 1255.00<\/td>\n 1394.00<\/td>\n 1537.00<\/td>\n 1165.00<\/td>\n 1197.00<\/td>\n 1330.00<\/td>\n 1465.00<\/td>\n 1112.00<\/td>\n<\/tr>\n \n 900<\/td>\n 945<\/td>\n 129.60<\/td>\n 232.00<\/td>\n 260.20<\/td>\n 289.00<\/td>\n C25<\/td>\n 197.68<\/td>\n 1521.00<\/td>\n 1691.00<\/td>\n 1863.00<\/td>\n 1446.00<\/td>\n 1452.00<\/td>\n 1613.00<\/td>\n 1777.00<\/td>\n 1257.00<\/td>\n<\/tr>\n \n 1000<\/td>\n 1048<\/td>\n 161.30<\/td>\n 275.00<\/td>\n 309.30<\/td>\n 343.20<\/td>\n C25<\/td>\n 266.28<\/td>\n 1811.00<\/td>\n 2017.00<\/td>\n 2221.00<\/td>\n 1759.00<\/td>\n 1729.00<\/td>\n 1925.00<\/td>\n 2118.00<\/td>\n 1679.00<\/td>\n<\/tr>\n \n 1100<\/td>\n 1152<\/td>\n 194.70<\/td>\n <\/td>\n 362.80<\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n 2372.00<\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n 1200<\/td>\n 1255<\/td>\n 237.70<\/td>\n 374.00<\/td>\n 420.10<\/td>\n 466.10<\/td>\n C25<\/td>\n 373.88<\/td>\n 2482.00<\/td>\n 2758.00<\/td>\n 3034.00<\/td>\n 2481.00<\/td>\n 2370.00<\/td>\n 2632.00<\/td>\n 2894.00<\/td>\n 2369.00<\/td>\n<\/tr>\n \n 1400<\/td>\n 1462<\/td>\n 279.30<\/td>\n <\/td>\n 547.20<\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n 3563.00<\/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 Mechanical Property<\/td>\n<\/tr>\n \n Nominal Diameter<\/td>\n Hydraulic test<\/td>\n Tensile strength<\/td>\n Elogation<\/td>\n Yield strength<\/td>\n Bending strength<\/td>\n Brinell hardness<\/td>\n Thickness of cement lining<\/td>\n<\/tr>\n \n DN(MM)<\/td>\n Mpa<\/td>\n Mpa<\/td>\n %<\/td>\n Mpa<\/td>\n Mpa<\/td>\n HB<\/td>\n mm<\/td>\n<\/tr>\n \n DN80-DN300<\/td>\n 5<\/td>\n \u2265420<\/td>\n \u226510<\/td>\n \u2265300<\/td>\n \u2265590<\/td>\n \u2264230<\/td>\n 3<\/td>\n<\/tr>\n \n DN350-DN600<\/td>\n 4<\/td>\n \u2265420<\/td>\n \u226510<\/td>\n \u2265300<\/td>\n \u2265590<\/td>\n \u2264230<\/td>\n 5<\/td>\n<\/tr>\n \n DN700-DN1000<\/td>\n 3.2<\/td>\n \u2265420<\/td>\n \u226510<\/td>\n \u2265300<\/td>\n \u2265590<\/td>\n \u2264230<\/td>\n 6<\/td>\n<\/tr>\n \n DN1100-DN1600<\/td>\n 2.5<\/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":1864,"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-1863","product","type-product","status-publish","has-post-thumbnail","hentry","products-ductile-iron-pipes"],"acf":[],"yoast_head":"\n