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Ductile Iron Pipes
Our Ductile Iron Pipes and fittings are produced with different kind of joints from from DN80-2000mm according to ISO2531 BS EN545 & 598 under the following production process:

  • Smelting and molten iron spheroidization;
  • Centrifugal casting and extraction from molds;
  • Heat treatment;
  • Finishing: The process includes testing and inspection in order to ensure pipe quality. All pipes are then externally coated with metallic zinc and sprayed with bitumen according to the ISO8179    standard;
  • Cement lining: All pipes are internally centrifugal lined by cement mortar lining according to the ISO4179 standard;
  • Bitumen coating: To prevent corrosion and give the pipe a good appearance, every ductile iron pipe is coated with bituminous paint, meanwhile undergoing a quality inspection of the external coating.

  1. Standard dimensions and weight of N1 type joint (K9, K7, C40, C30 class, standard effective length: 6m)
  2. Standard dimensions and weight of S type joint (K9, K7, C40, C30 class, standard effective length: 6m)
  3. Standard dimensions and weight of T type joint (K9, K7, C40, C30 class, standard effective length: 6m)

Weight and dimension table of push-on joint pipe



Mechanical Joint:

Mechanical joint has same flexibility of angular deflection with push-on type pipe. For dismantling, it is even easier than push-on joint. But for installation it is not as convenient as push-on joint.

Mechanical joint K-type is used mostly for pipes with big diameter. The Company develops mechanical joint N-type and S-type especially for gas-carrying pipeline. N-type is usually for low-pressure pipeline. S-type can be used for medium pressure pipeline.