The 12 inch (nominal) ductile iron pipe features a 335.28 mm outside diameter, exceptional durability, and versatile jointing options, making it ideal for potable water, wastewater, and industrial applications. Conforming to AWWA C151, ISO 2531, and EN 545, these pipes boast a service life exceeding 100 years, low life-cycle costs, and high resistance to internal pressure and external loads. A comparative table of OD values for 4″, 6″, 8″, 10″, and 12″ sizes is included to guide specification.<\/p>\n
Ductile iron pipes are predominantly used in:<\/p>\n
Potable Water Transmission & Distribution<\/strong>: Ensures safe, corrosion-protected pipelines for municipal water systems.<\/p>\n<\/li>\n Wastewater & Sewage<\/strong>: Handles high flow rates and aggressive media when lined appropriately.<\/p>\n<\/li>\n Irrigation & Industrial<\/strong>: Supports chemical plants, fire-protection mains, and reclaimed water networks owing to rugged construction.<\/p>\n<\/li>\n<\/ul>\n Modern ductile iron pipe systems are designed to exceed 100 years of service under normal conditions:<\/p>\n According to the Ductile Iron Pipe Research Association, pipes have a projected life of 100+ years due to superior metallurgical properties and recycled content.<\/p>\n<\/li>\n With standard cement-mortar lining and external coatings, internal corrosion is virtually eliminated, supporting century-long performance.<\/p>\n<\/li>\n<\/ul>\n High Strength & Pressure Rating<\/strong>: Nodular graphite microstructure offers twice the strength of gray iron, supporting classes up to 350 psi or higher.<\/p>\n<\/li>\n Corrosion Protection<\/strong>: Cement-mortar lining, zinc and asphalt coatings, and polyethylene sleeving guard against soil and water corrosion.<\/p>\n<\/li>\n Life-Cycle Cost Efficiency<\/strong>: Over a 100 year lifespan, ductile iron pipe incurs lower total costs compared to plastic alternatives.<\/p>\n<\/li>\n Seismic & Ground Movement Resistance<\/strong>: Flexible joints and restrained systems accommodate shifting soils and seismic events.<\/p>\n<\/li>\n<\/ul>\n ANSI\/AWWA C151\/A21.51<\/strong>: Governs dimensions and pressure classes from 3″ to 64″ for potable, raw, and reclaimed water systems.<\/p>\n<\/li>\n ISO 2531 \/ EN 545 \/ EN 598<\/strong>: Defines requirements for pipes, fittings, accessories, and joints for water and sewer applications.<\/p>\n<\/li>\n Regional Standards<\/strong>: KSD 4311 (Korea), AS 2280 (Australia), GB\/T 13295 (China) ensure local compliance and interoperability.<\/p>\n<\/li>\n<\/ul>\n <\/p>\n Data per BS EN 545 \/ AWWA C151: nominal ODs for cement-lined ductile iron pipes.<\/em><\/p>\n Push-On (Tyton) Joints<\/strong>: Quick assembly, accommodates deflection, ideal for curved alignments.<\/p>\n<\/li>\n Mechanical Joints<\/strong>: Bolted gland for positive restraint in high-pressure or seismic zones.<\/p>\n<\/li>\n Flanged Ends<\/strong>: Used where bolted connections to valves or pumps are required; standard to BS EN 1092-2 PN16.<\/p>\n<\/li>\n<\/ul>\n What is the maximum pressure rating?<\/strong> Can these pipes be sleeved for corrosion?<\/strong> What installation trench backfill is recommended?<\/strong> How are fittings supplied?<\/strong> Municipal Water Main Rehabilitation<\/strong>: A mid-sized U.S. city replaced 5 km of aging cast-iron mains with 12″ ductile iron, realizing a $17 million net present value savings over 50 years (Black & Veatch study) .<\/p>\n<\/li>\n Coastal Industrial Plant<\/strong>: Installed restrained mechanical joints and HDSS coated pipes to withstand saline drift and heavy machinery loads, achieving zero leaks over 15 years.<\/p>\n<\/li>\n<\/ul>\nService Life<\/h2>\n
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Advantages<\/h2>\n
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International Standards<\/h2>\n
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OD Comparison for 4″, 6″, 8″, 10″, and 12″ Pipes<\/h2>\n
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\n \nNominal Size<\/th>\n Outside Diameter (in)<\/th>\n Outside Diameter (mm)<\/th>\n<\/tr>\n<\/thead>\n \n 4 inch<\/td>\n 4.80<\/td>\n 121.92<\/td>\n<\/tr>\n \n 6 inch<\/td>\n 6.90<\/td>\n 175.26<\/td>\n<\/tr>\n \n 8 inch<\/td>\n 9.05<\/td>\n 229.87<\/td>\n<\/tr>\n \n 10 inch<\/td>\n 11.10<\/td>\n 281.94<\/td>\n<\/tr>\n \n 12 inch<\/td>\n 13.20<\/td>\n 335.28<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n Installation and Jointing<\/h2>\n
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FAQs<\/h2>\n
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Pressure classes range from 150 psi (Class K4) up to 350 psi (Class K12) per AWWA C151.<\/p>\n<\/li>\n
Yes\u2014polyethylene encasement per ANSI\/AWWA C105 prevents soil-induced corrosion.<\/p>\n<\/li>\n
Use granular, non-corrosive backfill materials; native soil may suffice if non-aggressive.<\/p>\n<\/li>\n
Fittings (tees, bends, reducers) follow ISO 2531 \/ EN 545 dimensions, integrally socketed or flanged.<\/p>\n<\/li>\n<\/ol>\nCase Studies<\/h2>\n
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ductile iron pipe dimensions<\/h2>\n
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\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
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\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":2068,"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-2067","product","type-product","status-publish","has-post-thumbnail","hentry","products-ductile-iron-pipes"],"acf":[],"yoast_head":"\n