Ductile Iron Pipe

Ductile Iron Pipes is an improvement to Cast Iron that has served the water industry with distinction through the centuries. The first ductile iron pipe was produced experimentally in 1948. Minor but significant changes in chemistries and processing result in physical differences at the micro-structure level that result in a vastly improved fracture toughness and ductility making Ductile Iron Substantially more resistant to damage from impact or concentrated loads.

Ductile Iron pipe is considered as the most prefered pipe material for water supply and pressure sewerage application all over the world, It offers higher tensile and diametral stiffness than mild steel and retains the inherent corrosion resistance of cast iron.

The ductile cast iron pipe has a semi-rigid behaviour: it offers an excellent compromise between mechanical stress in the wall (small DN) and ovality (large DN). It can be laid in high and low height of cover, and easily in soil of low rigidity. The ”ground/semi-rigid pipe” system offers optimum mechanical stability over time, without risk of buckling in large DN.

The ductile cast iron structure has a high elastic deformability and a high resistance to crack initiation: it results in excellent impact resistance. The cast iron pipes are perfectly suited to transport conditions over long distances (truck, train or ship), handling conditions on sites and to different types of backfilling. The ductile cast iron pipelines may be laid in very difficult areas: rocky mountain slopes for hydroelectric plants, crossings for cantilever bridges, rockfill for submarine outlets.

Quick and self-sealing, the watertightness of the STANDARD push-in joint results from radial compression of the sealing ring (1), by simply inserting the spigot ends into the socket. It does not require any tightening of bolts or a welding process.The STANDARD “push-in” joint is ideally suited for laying in trenches or overhead, irrespective of weather conditions.

  • Ductile Iron Pipes
  • Ductile Iron Pipes
  • Ductile Iron Pipes
  Class K7 Class K9
DN Thickness [mm] Allowable Maximun Operating Pressure [including Surge] in Mpa Thickness [mm] Allowable Maximun Operating Pressure [including Surge] in Mpa
Nom Min Nom Min
805.03.71.256.04.77.7
1005.03.71.256.04.77.7
1505.03.71.256.04.77.7
2005.03.71.256.34.87.4
2505.34.01.256.85.36.5
3005.64.31.257.25.65.9
3506.04.71.257.76.15.4
4006.34.81.258.16.45.1
4506.64.91.258.66.94.8
5007.05.21.259.07.24.6
6007.75.81.259.98.04.3
7009.07.01.2510.88.84.1
80010.47.71.511.79.63.8
90011.29.01.512.610.43.7
100012.09.71.513.511.23.6
110014.412.03.514.412.03.5
120015.312.83.415.312.83.4