4-inch ductile iron pipes (DN100) are a cornerstone of residential and light commercial water systems, offering durability, flexibility, and cost efficiency.
Key Features & Specifications
4-inch (DN100) ductile iron pipes are designed for reliability in low-to-medium pressure systems.
| Parameter | Details |
|---|---|
| Material | Ductile Iron (Grade 500-700 MPa tensile strength) |
| Pressure Class | K9 (PN10–PN40 / 10–40 bar) |
| Coating | Zinc-epoxy external coating + cement-mortar lining |
| Standards | ISO 2531, EN 545, EN 598, AWWA C151 |
| Joint Type | Push-on T-Joint, Flanged, Mechanical |
| Lifespan | 100+ years (with proper installation and maintenance) |
Applications
- Residential water supply networks
- Firefighting systems
- Small-scale irrigation and drainage
- Commercial building plumbing
- Industrial cooling water lines
Advantages of 4-Inch (DN100) Ductile Iron Pipes
✅ Compact Strength: Ideal for tight spaces without compromising pressure resistance.
✅ Corrosion Protection: Dual-layer coating ensures longevity in diverse soil conditions.
✅ Cost-Effective: Lower upfront and maintenance costs vs. PVC or steel alternatives.
✅ Easy Installation: Lightweight design reduces labor and equipment needs.
✅ Sustainability: 100% recyclable material with minimal environmental impact.
K9 Class vs. Other Pressure Ratings
| Class | Pressure Range | Typical Use Case |
|---|---|---|
| K8 | PN10–PN16 | Low-pressure residential lines |
| K9 | PN10–PN40 | Versatile urban/commercial use |
| K12 | PN40+ | High-pressure industrial systems |
K9 class is the most versatile, balancing affordability and performance for DN100 pipes.
Comparison: DN100 vs. DN200, DN500
| Parameter | DN100 (4″) | DN200 | DN500 |
|---|---|---|---|
| Pressure Rating | PN10–PN40 | PN16–PN40 | PN25–PN40 |
| Wall Thickness | 6.0–8.3 mm | 7.2–10.3 mm | 10.8–14.2 mm |
| Weight (kg/m) | 15–22 | 35–50 | 90–130 |
| Typical Use | Residential supply | Municipal distribution | Industrial pipelines |
| Installation Cost | Low | Moderate | High |
Price Table (2025 Reference)
| Diameter | Pressure Class | Price per Meter (USD) |
|---|---|---|
| 4″ (DN100) K9 | PN20 | 25–35 |
| 8″ (DN200) K9 | PN25 | 55–75 |
| 20″ (DN500) K9 | PN30 | 120–150 |
Prices vary based on order volume, coatings (e.g., polyurethane), and regional logistics. Request a quote for bulk discounts.
International Standards & Compliance
- ISO 2531: Defines dimensions, pressure ratings, and mechanical properties.
- AWWA C151: Certifies compliance with North American water infrastructure standards.
- EN 545/EN 598: Ensures suitability for European water and sewage systems.
Why Choose 4-Inch (DN100) K9 Ductile Iron Pipes?
- Proven Reliability: Widely used in residential and commercial projects globally.
- Adaptability: Compatible with retrofitting and trenchless installation.
- Low Maintenance: Minimal downtime over decades of service.
For technical support or custom requirements, download our catalog or contact our team.
Technical Notes
- DN100 pipes are ideal for retrofitting old cast iron systems due to compatible joint designs.
- Optional internal linings (e.g., epoxy) available for corrosive or high-temperature fluids.
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 | ….. |
