Overview

C‑CLASS ductile iron (DI) pipes are high‑performance pressure pipes defined by allowable working pressure, manufactured to international standards ISO 2531 and EN 545. They deliver optimized strength, ductility, and corrosion resistance for water supply, sewerage, and industrial fluid transmission. Centrifugally cast with nodular graphite microstructure, C‑CLASS pipes combine light weight, stable pressure rating, and long service life.

Key FeaturesPressure‑based classification: C25 (2.5 MPa), C30 (3.0 MPa), C40 (4.0 MPa) are standard grades, with higher classes available for heavy‑duty projects.

High strength & ductility: Nodular graphite structure delivers excellent impact resistance and flexibility, reducing breakage during installation and operation.

Superior corrosion protection:External: zinc coating + epoxy / asphalt finishInternal: cement mortar lining per ISO 4179Ensures long‑term durability in buried environments.

Flexible & reliable joints: T‑type push‑on joints with rubber gaskets provide tight sealing, earthquake resistance, and easy installation.

Cost‑effective design: Optimized wall thickness reduces pipe weight while maintaining rated pressure, lowering transport and construction costs.

Technical SpecificationsStandard: ISO 2531, EN 545, EN 598Nominal diameter: DN80 – DN2600Effective length: 5.7 m / 6.0 mJoint type: T‑push‑on, flange, restrainedCoatings: zinc, epoxy, cement mortar liningApplication pressure: C25 / C30 / C40

Typical ApplicationsMunicipal potable water transmission and distributionUrban sewerage and drainage networksIndustrial process water and wastewater pipelinesIrrigation, water conservancy, and fire‑protection systemsHigh‑pressure underground pipe networks

Advantages SummaryStable pressure rating for precise engineering designLightweight yet strong, easy to transport and installExcellent corrosion resistance, service life over 50 yearsFlexible joints adapt to ground settlementCompliant with global standards, suitable for international projects

C‑CLASS ductile iron pipes are a trusted solution for modern water infrastructure projects requiring safety, durability, and cost efficiency.