This comprehensive chart provides standardized diameter specifications for ductile iron pipes,It includes metric (mm) and imperial (inch) measurements, aligning with international standards like ISO 2531 and EN 545.Ductile Iron Pipes are used for water and waste water transportation. Ductile pipes are available in the size range of DN 100 – DN 2200.
BASIC DIMENSION OF PIPES-PRESSURE CLASS ( As per ISO:2531 and EN:545) and THICKNESS CLASS (As per IS:8329)
| PRESSURE CLASS | THICKNESS CLASS | |||||
|---|---|---|---|---|---|---|
| Nominal Dia. DN |
External Dia. (DE) |
Tol. on DE |
Preferred ‘C’ class |
C class Nom Thickness |
Nominal Thickness of K9 | Nominal Thickness of K7 |
| (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | |
| 80 | 98 | +1/-2.7 | C40 | 4.4 | 6 | 5 |
| 100 | 118 | +1/-2.8 | C40 | 4.4 | 6 | 5 |
| 150 | 170 | +1/-2.9 | C40 | 4.5 | 6 | 5 |
| 200 | 222 | +1/-3.0 | C40 | 4.7 | 6.3 | 5 |
| 250 | 274 | +1/-3.1 | C40 | 5.5 | 6.8 | 5.3 |
| 300 | 326 | +1/-3.3 | C40 | 6.2 | 7.2 | 5.6 |
| 350 | 378 | +1/-3.4 | C30 | 6.3 | 7.7 | 6.0 |
| 400 | 429 | +1/-3.5 | C30 | 6.5 | 8.1 | 6.3 |
| 450 | 480 | +1/-3.6 | C30 | 6.9 | 8.6 | 6.6 |
| 500 | 532 | +1/-3.8 | C30 | 7.5 | 9.0 | 7.0 |
| 600 | 635 | +1/-4 .0 | C30 | 8.7 | 9.9 | 7.7 |
| 700 | 738 | +1/4.3 | C25 | 8.8 | 10.8 | 9.0 |
| 800 | 842 | +1/4.5 | C25 | 9.6 | 11.7 | 10.4 |
| 900 | 945 | +1/-4.8 | C25 | 10.6 | 12.6 | 11.2 |
| 1000 | 1048 | +1/-5.0 | C25 | 11.6 | 13.5 | 12.0 |
| 1100 | 1152 | +1/-6.0 | C25 | 12.6 | 14.4 | |
| 1200 | 1255 | +1/-6.2 | C25 | 13.6 | 15.3 | |
AWWA Ductile iron pipe data
| Nominal Pipe Size Inches | Nominal Pipe Size mm | Outside Diameter Inches | Outside Diameter mm | Class | Wall Thickness Inches | Weight of Pipe Lb/ft | Weight of Pipe & Water Lb/ft |
|---|---|---|---|---|---|---|---|
| 3″ | 80.00 | 3.96 | 100.60 | 53.00 | 0.31 | 11.20 | 15.00 |
| 4″ | 100.00 | 4.80 | 121.90 | 53.00 | 0.32 | 14.20 | 20.10 |
| 6″ | 150.00 | 6.90 | 175.30 | 53.00 | 0.34 | 22.00 | 35.10 |
| 8″ | 200.00 | 9.05 | 229.90 | 53.00 | 0.36 | 31.00 | 54.00 |
| 10″ | 250.00 | 11.10 | 281.90 | 53.00 | 0.38 | 40.40 | 76.80 |
| 12″ | 300.00 | 13.20 | 335.20 | 53.00 | 0.40 | 50.70 | 103.00 |
| 14″ | 350.00 | 15.30 | 388.60 | 53.00 | 0.42 | 62.40 | 133.50 |
| 16″ | 400.00 | 17.40 | 442.00 | 53.00 | 0.43 | 72.80 | 165.90 |
| 18″ | 450.00 | 19.50 | 495.30 | 53.00 | 0.44 | 83.60 | 201.50 |
| 20″ | 500.00 | 21.60 | 548.60 | 53.00 | 0.45 | 95.20 | 241.00 |
| 24″ | 600.00 | 25.80 | 655.30 | 53.00 | 0.47 | 119.20 | 329.40 |
| 30″ | 750.00 | 32.00 | 812.80 | 53.00 | 0.51 | 161.30 | 487.80 |
| 36″ | 900.00 | 38.30 | 972.80 | 53.00 | 0.58 | 219.50 | 688.80 |
| 42″ | 1050.00 | 44.50 | 1130.30 | 53.00 | 0.65 | 285.20 | 920.10 |
| 48″ | 1200.00 | 50.80 | 1290.30 | 53.00 | 0.72 | 360.30 | 1189.20 |
| 54″ | 1350.00 | 57.10 | 1450.30 | 53.00 | 0.81 | 455.00 | 1502.20 |