\nMunicipal water distribution<\/strong>: Their high working pressure and smooth internal lining support consistent flow rates in urban networks.<\/p>\n<\/li>\n\nWastewater and sewage systems<\/strong>: Excellent corrosion resistance reduces leakage and maintenance, even under heavy traffic loads.<\/p>\n<\/li>\n\nIrrigation and agricultural supply<\/strong>: Robust against soil stresses and ground movement, ensuring reliable delivery across varied terrains.<\/p>\n<\/li>\n\nFire protection mains<\/strong>: With a burst pressure three times the working pressure, K7 pipes meet stringent safety factors for fire\u2011fighting systems.<\/p>\n<\/li>\n\nIndustrial process lines<\/strong>: Chemical plants and refineries benefit from high tensile strength and custom coatings for aggressive media.<\/p>\n<\/li>\n<\/ul>\nService Life<\/h2>\n
Modern ductile iron pipes are engineered for longevity:<\/p>\n
\n- \n
100\u00a0+\u00a0years<\/strong> under evolved laying practices (cement\u2011mortar lining, polyethylene encasement).<\/p>\n<\/li>\n- \n
50\u201375\u00a0years<\/strong> for uncoated or traditionally protected pipes.<\/p>\n<\/li>\n- \n
Comparison with alternatives<\/strong>: PVC pipes typically last \u224850 years, making ductile iron a longer\u2011term investment.<\/p>\n<\/li>\n<\/ul>\n\n
\n
\n\n\n| Material<\/th>\n | Typical Service Life<\/th>\n<\/tr>\n<\/thead>\n |
\n\n| Ductile Iron (coated)<\/td>\n | \u2265\u00a0100\u00a0years<\/td>\n<\/tr>\n |
\n| Ductile Iron (uncoated)<\/td>\n | 50\u201375 years<\/td>\n<\/tr>\n |
\n| PVC<\/td>\n | 50 years<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\nInstallation and Connections<\/h2>\nClass\u00a0K7 DN150 supports multiple joint systems:<\/p>\n \n- \n
Push\u2011on (T\u2011type)<\/strong>: Quick assembly with rubber ring seals; angular deflection up to 5\u00b0 per joint.<\/p>\n<\/li>\n- \n
Mechanical (MJ)<\/strong>: Bolted restraint for high\u2011pressure or thrust\u2011resistant applications.<\/p>\n<\/li>\n- \n
Flanged ends<\/strong>: For easy integration with valves and fittings per ISO\/AWWA flange standards.<\/p>\n<\/li>\n- \n
Self\u2011anchored joints<\/strong>: Eliminates separate thrust blocks, reducing excavation and installation time.<\/p>\n<\/li>\n<\/ul>\nInternational Standards<\/h2>\nClass\u00a0K7 DN150 pipes are certified to these key specifications:<\/p>\n \n- \n
ISO\u00a02531:2009<\/strong> (ductile iron pipes for water applications).<\/p>\n<\/li>\n- \n
EN\u00a0545:2010\u00a0+A1:2009<\/strong> (ductile iron pipes, fittings for potable water).<\/p>\n<\/li>\n- \n
ANSI\/AWWA C150\/A21.50 & C151\/A21.51<\/strong> (design and centrifugally cast DI pipes).<\/p>\n<\/li>\n- \n
BS\u00a0EN\u00a0598:2007<\/strong> (pipes and fittings for sewerage).<\/p>\n<\/li>\n<\/ul>\nPrice Comparison with Other Series<\/h2>\nBelow is an indicative price range for DN150 pipes. Actual prices vary by order volume, region, and coatings.<\/p>\n \n \n \n\n\n| Class<\/th>\n | Pressure Rating<\/th>\n | Price Range (USD\/m)<\/th>\n | <\/th>\n<\/tr>\n<\/thead>\n | \n\nK7<\/strong><\/td>\n| 7\u00a0bar (100\u00a0psi)<\/td>\n | 425\u2013485<\/td>\n<\/tr>\n | \nK7<\/strong><\/td>\n| 7\u00a0bar<\/td>\n | 488.5\u2013531<\/td>\n<\/tr>\n | \nC25<\/strong><\/td>\n| 2.5\u00a0MPa (\u224825\u00a0bar)<\/td>\n | 499\u2013575<\/td>\n<\/tr>\n | \nC30<\/strong><\/td>\n| 3.0\u00a0MPa<\/td>\n | 499\u2013575<\/td>\n<\/tr>\n | \nC40<\/strong><\/td>\n| 4.0\u00a0MPa<\/td>\n | 497\u2013697<\/td>\n<\/tr>\n | \nK8<\/strong><\/td>\n| 8\u00a0bar (116\u00a0psi)<\/td>\n | 509\u2013540<\/td>\n<\/tr>\n | \nK9<\/strong><\/td>\n| 9\u00a0bar (130\u00a0psi)<\/td>\n | 545.3\u2013645<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\nKey Advantages<\/h2>\n\n- \n
High mechanical strength<\/strong>: Tensile \u2265420 MPa, yield \u2265300 MPa, elongation \u226510%.<\/p>\n<\/li>\n- \n
Excellent corrosion resistance<\/strong>: Cement\u2011mortar lining, epoxy or bitumen external coatings, plus optional Zn\/Al or polyethylene encasement.<\/p>\n<\/li>\n- \n
Hydraulic efficiency<\/strong>: Smooth lining yields low friction losses, reducing pumping costs.<\/p>\n<\/li>\n- \n
Flexibility & deflection<\/strong>: Angular joints absorb ground movement and seismic loads without leakage.<\/p>\n<\/li>\n- \n
Environmental sustainability<\/strong>: > 90% recycled material content; certified by sustainability bodies.<\/p>\n<\/li>\n<\/ol>\nFrequently Asked Questions<\/h2>\nQ1: What does \u201cClass K7\u201d signify?<\/strong>
A1: A nominal pressure class indicating a working pressure of 7 bar (\u2248100 psi), suitable for most municipal and industrial applications.<\/p>\nQ2: Why choose DN150?<\/strong>
A2: DN150 (6\u2033) balances capacity and ease of handling, making it ideal for trunk mains and service laterals in urban and rural settings .<\/p>\nQ3: How do I mitigate corrosion?<\/strong>
A3: Standard cement\u2011mortar lining combined with external polyethylene encasement (ANSI\/AWWA C105\/A21.5) protects pipes even in aggressive soils.<\/p>\nQ4: Can these pipes be used for fire mains?<\/strong>
A4: Yes\u2014burst pressures exceed 3\u00d7 working pressure, meeting NFPA fire protection requirements.<\/p>\nCase Studies<\/h2>\n\n- \n
City of Huntsville, AL<\/strong>: Over a 50\u2011year span (an example life expectancy for traditional DI), K\u2011class pipes delivered a net present value saving of $17 million in energy costs alone.<\/p>\n<\/li>\n- \n
Large\u2011Scale Irrigation in Northern Spain<\/strong>: 120\u00a0km of DN150\u00a0K7 lines with polyethylene encasement have operated for 20\u00a0years without a single joint failure, reducing downtime by 85%.<\/p>\n<\/li>\n- \n
Industrial Plant in Germany<\/strong>: A chemical facility retrofitted 500\u00a0m of DN150 K7 with HDPE external coating and zinc sacrificial layer; inspections at 15\u00a0years show zero measurable corrosion.<\/p>\n<\/li>\n<\/ul>\nductile 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>\nductile 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":1825,"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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