A 15 inch ductile iron pipe combines durable, high-capacity flow with proven longevity and versatile joint systems, making it ideal for municipal water mains, sewer force mains, industrial process lines, and trenchless rehabilitation projects. Engineered to exceed a 100-year service life, these pipes leverage cement-mortar linings and external coatings to resist corrosion in a wide range of soils and pressures. Manufactured under ISO 2531, EN 545/EN 598, and ANSI/AWWA C110 & C151 standards, they deliver consistent quality and easy integration into global infrastructure networks. At Class 52 (250 psi), the 15″ size typically costs around $54.00/ft (midpoint between $49.81 for 14″ and $58.37 for 16″) and is competitively priced against other diameters and materials.
Application Scenarios
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Potable Water Distribution: Transmits high volumes over long distances with minimal head loss, supporting urban and rural systems alike.
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Wastewater & Sewer Force Mains: Pressure-tight joints and corrosion-resistant linings make it standard for sewer conveyance and treatment plant piping.
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Industrial & Power Facilities: Handles surge pressures and thermal variations in cooling, process, and fire-protection loops.
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Trenchless Rehabilitation: Adaptable to slip-lining and pipe-bursting methods, enabling rapid upgrades of aging mains with minimal surface disruption.
Service Life
Modern ductile iron pipe is designed for over 100 years of service, supported by its heritage in North American systems where original installations over a century old remain operational.
Installation & Connection
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Push-On Joints: Quick assembly with elastomeric gaskets, offering slight flexibility to absorb ground movement.
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Mechanical Joints: Gland-and-split-ring assemblies for restrained applications without thrust blocks.
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Restrained-Joint Solutions: Systems like TR-FLEX eliminate thrust blocks and simplify alignment in high-pressure zones.
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Flanged Ends: Standardized for above-ground connections to valves, pumps, and fittings, per AWWA C115.
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External Coatings: Options include asphaltic (per AWWA C151), zinc‐bitumen, fusion-bonded epoxy, and polyethylene encasement for aggressive soils.
International Standards
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ISO 2531: Specifies materials, dimensions, testing, and joint performance for water pipelines.
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EN 545 / EN 598: European standards for ductile iron pipes and fittings in water and wastewater applications.
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ANSI/AWWA C110 & C151: Defines thicknesses, pressure classes, linings/coatings, and fabrication requirements.
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AWWA C600: Guidelines for installation practices, including trenching, bedding, and joint restraint.
Price Comparison (Class 52, Per Foot)
| Nominal Diameter | Price (USD/ft) |
|---|---|
| 12″ | $40.31 |
| 14″ | $49.81 |
| 15″ | ~$54.00 (est.) |
| 16″ | $58.37 |
| 20″ | $76.54 |
Custom sizes such as 15″ are available on request; price is interpolated between standard 14″ and 16″ figures.
Key Advantages
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Superior Strength & Resilience: Tensile strengths ~60,000 psi and excellent impact resistance minimize breaks under traffic loads.
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Long-Term Cost Efficiency: Low maintenance and extended lifespan yield lower lifecycle costs than PVC or HDPE, despite higher upfront investment.
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Sustainability: Over 90% recycled content and full recyclability at end-of-life support green infrastructure goals.
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Hydraulic Performance: Smooth cement-mortar lining reduces friction, allowing smaller trench widths and lower pumping costs.
FAQ
Q1: What pressure classes are common for 15″ DI?
A: Typically Class 52 (250 psi) and Class 350 (350 psi) per ANSI/AWWA C151, with higher classes available for special applications.
Q2: How is external corrosion controlled?
A: Through asphaltic or epoxy coatings, zinc-bitumen, and optional polyethylene encasement (“Method A”) for installation in aggressive soils.
Q3: Can ductile iron pipe tie into PVC or HDPE mains?
A: Yes—mechanical adapters, flanged transition couplings, and universal couplings facilitate mixed-material networks.
Case Studies
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Midwest Trenchless Renewal: A 4 mile sewer main replacement via pipe-bursting with ductile iron yielded a 30% cost saving and minimized surface restoration.
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Sioux Falls Sewer Rehab: Replaced a failing 36″ sewer force main with Class 350 DI fittings, avoiding repeated leaks and reducing environmental risk.
ductile iron pipe dimensions
| Pipe body weight （kg/m) | |||||||||||||||
| (Inside Diameter) | (Outside Diameter) | Socket Weight | K8 | K9 | K10 | C class | Total weight of Active Length=6M (kg) | Total weight of Active Length=5.7M (kg) | |||||||
| DN(mm) | OD(mm) | ≈ kg | Class | kg/m | K8 | K9 | K10 | C class | K8 | K9 | K10 | C class | |||
| 80 | 98 | 3.40 | 12.20 | 12.20 | 12.20 | C40 | 9.10 | 77.00 | 77.00 | 77.00 | 58.00 | 73.00 | 73.00 | 73.00 | 55.00 |
| 100 | 118 | 4.30 | 14.90 | 15.10 | 15.10 | C40 | 11.12 | 93.70 | 95.00 | 95.00 | 71.00 | 90.00 | 91.00 | 90.00 | 68.00 |
| 125 | 144 | 5.70 | 18.90 | C40 | 119.00 | ||||||||||
| 150 | 170 | 7.10 | 21.80 | 22.80 | 22.80 | C40 | 16.48 | 138.00 | 144.00 | 144.00 | 106.00 | 132.00 | 138.00 | 137.00 | 101.00 |
| 200 | 222 | 10.30 | 28.70 | 30.60 | 30.60 | C40 | 22.62 | 183.00 | 194.00 | 194.00 | 146.00 | 174.00 | 185.00 | 185.00 | 139.00 |
| 250 | 274 | 14.20 | 35.60 | 40.20 | 44.30 | C40 | 32.63 | 228.00 | 255.00 | 280.00 | 210.00 | 218.00 | 244.00 | 267.00 | 200.00 |
| 300 | 326 | 18.90 | 45.30 | 50.80 | 56.30 | C30 | 43.90 | 290.00 | 323.00 | 357.00 | 282.00 | 278.00 | 309.00 | 340.00 | 269.00 |
| 350 | 378 | 23.70 | 55.90 | 63.20 | 69.60 | C30 | 51.88 | 359.00 | 403.00 | 441.00 | 335.00 | 343.00 | 384.00 | 420.00 | 319.00 |
| 400 | 429 | 29.50 | 67.30 | 75.50 | 83.70 | C30 | 60.78 | 433.00 | 482.00 | 532.00 | 394.00 | 414.00 | 460.00 | 506.00 | 376.00 |
| 450 | 480 | 38.30 | 80.00 | 89.30 | 99.00 | C30 | 73.30 | 515.00 | 575.00 | 632.00 | 472.00 | 492.00 | 550.00 | 597.00 | 450.00 |
| 500 | 532 | 42.80 | 92.80 | 104.30 | 115.60 | C30 | 87.20 | 600.00 | 669.00 | 736.00 | 566.00 | 572.00 | 638.00 | 702.00 | 540.00 |
| 600 | 635 | 59.30 | 122.00 | 137.30 | 152.00 | C30 | 120.62 | 791.00 | 882.00 | 971.00 | 783.00 | 755.00 | 842.00 | 926.00 | 747.00 |
| 700 | 738 | 79.10 | 155.00 | 173.90 | 193.00 | C25 | 142.15 | 1009.00 | 1123.00 | 1237.00 | 932.00 | 963.00 | 1071.00 | 1179.00 | 889.00 |
| 800 | 842 | 102.60 | 192.00 | 215.20 | 239.00 | C25 | 177.07 | 1255.00 | 1394.00 | 1537.00 | 1165.00 | 1197.00 | 1330.00 | 1465.00 | 1112.00 |
| 900 | 945 | 129.60 | 232.00 | 260.20 | 289.00 | C25 | 197.68 | 1521.00 | 1691.00 | 1863.00 | 1446.00 | 1452.00 | 1613.00 | 1777.00 | 1257.00 |
| 1000 | 1048 | 161.30 | 275.00 | 309.30 | 343.20 | C25 | 266.28 | 1811.00 | 2017.00 | 2221.00 | 1759.00 | 1729.00 | 1925.00 | 2118.00 | 1679.00 |
| 1100 | 1152 | 194.70 | 362.80 | 2372.00 | |||||||||||
| 1200 | 1255 | 237.70 | 374.00 | 420.10 | 466.10 | C25 | 373.88 | 2482.00 | 2758.00 | 3034.00 | 2481.00 | 2370.00 | 2632.00 | 2894.00 | 2369.00 |
| 1400 | 1462 | 279.30 | 547.20 | 3563.00 | |||||||||||
ductile iron pipe Mechanical property
| Mechanical Property | |||||||
| Nominal Diameter | Hydraulic test | Tensile strength | Elogation | Yield strength | Bending strength | Brinell hardness | Thickness of cement lining |
| DN(MM) | Mpa | Mpa | % | Mpa | Mpa | HB | mm |
| DN80-DN300 | 5 | ≥420 | ≥10 | ≥300 | ≥590 | ≤230 | 3 |
| DN350-DN600 | 4 | ≥420 | ≥10 | ≥300 | ≥590 | ≤230 | 5 |
| DN700-DN1000 | 3.2 | ≥420 | ≥10 | ≥300 | ≥590 | ≤230 | 6 |
| DN1100-DN1600 | 2.5 | ≥420 | ≥7 | ≥300 | ≥590 | ≤230 | ….. |
