The Class K12 DN2600 ductile iron pipe is engineered for high-capacity, high-pressure water and wastewater systems, combining exceptional strength, ductility and corrosion resistance in a 2600 mm diameter format. With an operating pressure rating of 12 bar, it suits large municipal mains, raw-water transmission and industrial supply networks. Its cement-mortar lining and bituminous exterior protect against internal and external corrosion, yielding a reliable service life well beyond 100 years. Installation is streamlined via push-on Tyton® joints and standard thrust-block techniques. Fully compliant with ISO 2531 and EN 545 (plus related ISO sewage and lining standards), Class K12 DN2600 pipes deliver cost-effective durability.
Application Scenarios
Ductile iron pipes in Class K12 (12 bar) and DN2600 mm are ideal for:
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Municipal water distribution: Main transmission lines in large cities, ensuring stable pressure and flow.
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Raw-water transfer: Linking reservoirs to treatment plants over long distances.
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Sewage and stormwater systems: Where high strength and abrasion resistance are required.
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Industrial process water: Power stations, chemical plants and steelworks benefit from high-pressure resilience.
Service Life
Modern ductile iron pipe reliably exceeds a century in service under normal conditions:
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100 + years design life: Centuries-old installations still perform today.
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Resistant to aging: Cement-mortar lining virtually eliminates internal corrosion.
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Environmental benefits: Recyclable material and low life-cycle cost make it a sustainable choice.
Installation and Connection
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Tyton® push-on joints: Quick, watertight assembly without specialized tools.
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Gasket and thrust-block methods: Standard elastomeric gaskets ensure sealing; concrete thrust blocks absorb reaction forces at bends and hydrants.
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Field practices: Alignment, cutting and joint inspection per manufacturer guidelines guarantee performance and safety.
International Standards Compliance
Class K12 DN2600 ductile iron pipes adhere to:
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ISO 2531:2009 – Materials, dimensions, mechanical properties and testing for pressure pipelines.
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EN 545 – Ductile iron pipes for potable water, replacing older EN 598 sewage standard.
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ISO 7186 & ISO 4179 – Products for sewage applications and lining requirements.
Price Comparison with Other Series
| Class | Typical Price (USD/m) | Pressure Rating |
|---|---|---|
| K7 | $420 – $480 | 7 bar |
| K9 | $400 – $565 | 9 bar |
| K12 | $450 – $700 | 12 bar |
Prices vary by diameter, coating and order volume. K12 commands a premium for thicker walls and higher pressure tolerance.
Advantages
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High strength & ductility: Withstands internal/external loads and ground movement.
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Excellent corrosion resistance: Cement-mortar lining plus optional external coatings (bitumen, zinc-aluminum).
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Long-term cost savings: Low maintenance and energy-efficient flow coefficients reduce lifecycle costs.
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Sustainability: Recyclable iron content and minimal environmental impact .
Frequently Asked Questions
Q1: What does “Class K12” mean?
It denotes a nominal pressure rating of 12 bar, corresponding to a minimum average wall thickness per ISO 2531.
Q2: Why DN2600?
DN2600 indicates an internal diameter of 2600 mm, chosen for high-capacity mains in large cities or major trunk lines.
Q3: How long will these pipes last?
Over 100 years under proper installation and maintenance, thanks to advanced linings that inhibit corrosion.
Q4: Can I install them without heavy machinery?
Push-on joints and standardized fittings allow relatively rapid assembly; however, cranes and alignment equipment are needed for DN2600 sections.
Case Studies
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Historic U.S. water mains: Early 20th-century ductile iron pipes remain in service, testifying to 100+ year durability.
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Cost savings analysis: A 50-year study by Black & Veatch showed present-value savings of over $17 million through life-cycle efficiencies.
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 | ….. |
