A robust solution for modern water and wastewater systems, the 14 inch ductile iron pipe delivers over a century of reliable service life while accommodating shallow or deep burial under heavy loads. It conforms to global standards (ISO 2531, EN 545/598, AWWA C110/C151) and supports multiple joint types—push-on, mechanical, restrained, and flanged—ensuring ease of installation and long-term leak-tight performance. Class 52 pricing spans $22.71/ft (4″) to $342.26/ft (48″), with the 14″ size at $49.81/ft. Its high flow capacity, environmental benefits (recyclability, energy savings), and proven success in municipal projects make it a cost-effective lifecycle choice for engineers and contractors worldwide.
Application Scenarios
-
Water Distribution Mains: Ideal for potable water transmission and trunk mains in urban and rural settings, supporting high flow rates with minimal head loss.
-
Wastewater & Sewage Networks: Meets stringent requirements for pressure-tight joints and corrosion resistance in collection and conveyance systems.
-
Industrial & Power Plants: Handles high surge and operating pressures in cooling water, fire-protection, and process lines.
-
Trenchless Rehabilitation: Suitable for pipe-bursting and slip-lining projects, replacing aging clay, steel, or HDPE mains with minimal disruption.
Service Life
Modern ductile iron pipe is engineered for a 100+ year lifespan in corrosive soils and variable temperatures, backed by proven in-service performance since the early 1900s.
Installation & Connection
Installation follows DIPRA best-practices:
-
Push-On Joints with elastomeric gaskets for quick, flexible alignment.
-
Mechanical Joints using gland-and-bonnet assemblies for restrained applications.
-
Restrained-Joint Systems (e.g., TR FLEX) for thrust-resistance without thrust blocks.
-
Flanged Ends for above-ground or valve/fitting connections.
Polyethylene encasement protects against corrosion in aggressive soils; overlapping “Method A” wrap is the industry standard.
International Standards
Manufacture and testing comply with:
-
ISO 2531 / EN 545 / EN 598 (European and global quality specifications)
-
AWWA C110 / C151 / C600 (American Water Works Association guidelines for thickness, pressure rating, and installation)
Price Comparison (Class 52, per Foot)
Data source: Class 52 DI pipes, MachineMFG
Key Advantages
-
High Flow Capacity: Larger ID vs. PVC/HDPE, reducing trench width and costs.
-
Environmental Sustainability: > 90% recycled content, fully recyclable at end of life, and lower pumping energy.
-
Mechanical Resilience: Superior impact, surge, and load resistance minimizes breaks and service interruptions.
-
Lifecycle Cost-Effectiveness: Lower total cost over 50–100 years despite higher initial investment.
FAQ
Q1: What pressure class is standard for 14″ DI?
A: Typically Class 52 (250 psi) or Class 350 (350 psi) options are available per AWWA C151.
Q2: How is corrosion controlled?
A: Cement mortar lining internally and polyethylene (or zinc) external coatings plus encasement prevent corrosion.
Q3: Can DI pipe connect to PVC or HDPE?
A: Yes—mechanical adapters, flanged transitions, and push-on couplings facilitate mixed‐material networks.
Case Studies
-
City of San Lorenzo, CA: After a major wildfire melted HDPE mains, DI replacements prevented future heat damage and saved 4.5 million gallons of water loss.
-
Midwestern Trenchless Renewal: A 2 mile sewer main was rehabilitated via pipe bursting with DI, reducing restoration costs by 30%.
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 | ….. |
