A heavy-duty solution for large-diameter piping needs, the Class K9 DN2000 ductile iron pipe combines robust mechanical strength, long service life, and versatile joint options. Made to ISO 2531\/EN 545 standards, it\u2019s ideal for bulk water transmission, sewage mains, irrigation, and fire-fighting networks. K-series pipes (K7, K8, K9, K12) differ in wall-thickness and pressure ratings; a comparative table helps select the right class and budget. Engineered coatings and advanced laying methods ensure 100-year+ lifespans in most soils.<\/p>\n
Ductile iron pipes excel in demanding fluid-transport systems. They are widely used for:<\/p>\n
Potable water transmission<\/strong> in municipal and bulk water mains.<\/p>\n<\/li>\n Sewer and wastewater<\/strong> conveyance in trunk and force mains.<\/p>\n<\/li>\n Industrial process lines<\/strong> (e.g., mining, petrochemical plants).<\/p>\n<\/li>\n Irrigation networks<\/strong> for agriculture and reclaimed water systems.<\/p>\n<\/li>\n Fire-fighting and hydrant systems<\/strong>, where high pressure and reliability are critical.<\/p>\n<\/li>\n<\/ul>\n Well-engineered ductile iron pipelines can exceed 100 years<\/strong> under \u201cevolved laying practices\u201d (including polyethylene sleeving).<\/p>\n Cement-mortar internal lining<\/strong> prevents tuberculation and preserves flow capacity.<\/p>\n<\/li>\n External coatings<\/strong> (zinc, bitumen, epoxy) and loose polyethylene encasement guard against external corrosion.<\/p>\n<\/li>\n<\/ul>\n Multiple joint types support various soil and pressure conditions:<\/p>\n Push-on (T-type) joints<\/strong> with rubber gaskets for quick assembly.<\/p>\n<\/li>\n Mechanical joints<\/strong> for restrained connections under high thrust.<\/p>\n<\/li>\n Self-restrained (hidden-restrained) joints<\/strong> eliminating thrust blocks.<\/p>\n<\/li>\n Flanged ends<\/strong> for above-ground or special-access fittings. <\/p>\n ISO 2531<\/strong>: Centrifugal casting, dimensional tolerances.<\/p>\n<\/li>\n EN 545 \/ EN 598<\/strong>: Requirements for water and sewage applications.<\/p>\n<\/li>\n AWWA C151<\/strong> (USA): Ductile iron pipe for water transmission.<\/p>\n<\/li>\n ISO 1083 \/ EN 15655<\/strong>: Material grades and polyurethane lining specifications.<\/p>\n<\/li>\n<\/ul>\n High strength & durability<\/strong>: Spheroidal graphite microstructure resists cracking and fatigue.<\/p>\n<\/li>\n Corrosion resistance<\/strong>: Modern linings\/coatings extend service life in aggressive soils.<\/p>\n<\/li>\n Versatile installation<\/strong>: Supports a wide range of joint types and trench conditions.<\/p>\n<\/li>\n Recyclability<\/strong>: Iron content is 100% recyclable at end-of-life.<\/p>\n<\/li>\n Low life-cycle cost<\/strong>: Minimal maintenance over a century-long service.<\/p>\n<\/li>\n<\/ol>\n Q1: What\u2019s the difference between K-class and C-class pipes?<\/strong> Q2: Can Class K9 handle sewage?<\/strong> Q3: What trench bedding is recommended?<\/strong> Q4: How are thrusts managed at bends and tees?<\/strong> Abu Dhabi Bulk Water Aqueduct<\/strong>: CLASSIC DN2000 pipes in desert transport 2 m\u00b3\/s over 100 km with minimal maintenance.<\/p>\n<\/li>\n European Alpine Reservoir Feed<\/strong>: Saint-Gobain PAM DN1200\u2013DN2000 range in mountainous terrain, enduring freeze\u2013thaw cycles.<\/p>\n<\/li>\n Indian Sewage Trunk Main<\/strong>: DN1400\u2013DN2000 pipes in corrosive soils, >50 years of reliable service to date.<\/p>\n<\/li>\n<\/ul>\nService Life<\/h2>\n
\n
Installation and Connection<\/h2>\n
\n
Pipes are supplied in standard lengths of 5.5 m\u20136 m<\/strong>, customizable to 5.6\u20135.8 m as needed.<\/p>\n<\/li>\n<\/ul>\nK-Series Comparison<\/h2>\n
\n\n
\n \nClass<\/th>\n Pressure Rating<\/th>\n Tensile Strength<\/th>\n Typical Price (USD\/m)<\/th>\n Main Uses<\/th>\n<\/tr>\n<\/thead>\n \n K7<\/strong><\/td>\n 7 bar (700 kPa)<\/td>\n \u2265 420 MPa<\/td>\n 500\u2013600<\/td>\n Low-pressure water mains, rural supply<\/td>\n<\/tr>\n \n K8<\/strong><\/td>\n 8 bar (800 kPa)<\/td>\n \u2248 414 MPa<\/td>\n 510\u2013570<\/td>\n Medium-pressure distribution, sewer lines<\/td>\n<\/tr>\n \n K9<\/strong><\/td>\n 9 bar (900 kPa)<\/td>\n \u2265 420 MPa<\/td>\n 545\u2013645<\/td>\n High-pressure mains, fire-fighting networks<\/td>\n<\/tr>\n \n K12<\/strong><\/td>\n 12 bar (1200 kPa)<\/td>\n \u2013<\/td>\n Contact supplier<\/td>\n Specialized high-pressure pipelines<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n International Standards Compliance<\/h2>\n
\n
Advantages<\/h2>\n
\n
Frequently Asked Questions<\/h2>\n
K-class is based on pressure rating (bar), while C-class is based on minimum cement thickness (mm). For large diameters DN700\u2013DN1200, C25\/C30\/C40 are common.<\/p>\n
Yes\u2014K9 pipes with cement-mortar lining meet EN 598 requirements for sewage and reclaimed water.<\/p>\n
A well-graded granular bedding with compaction per EN 1610 and AWWA instructions ensures minimal deflection and long service.<\/p>\n
Use mechanical or restrained joints, or thrust blocks, depending on joint type and soil conditions.<\/p>\nCase Studies<\/h2>\n
\n
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":1945,"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-1944","product","type-product","status-publish","has-post-thumbnail","hentry","products-ductile-iron-pipes"],"acf":[],"yoast_head":"\n