Ductile iron pipe (DIP) is a high-performance pipeline material made by spheroidization treatment of molten iron, forming spherical graphite inside the metal matrix. It combines the rigidity of cast iron with the toughness of steel, making it the preferred choice for water supply, drainage, gas transmission and municipal engineering worldwide.

Core Features

• High Strength & Toughness: Excellent tensile strength, yield strength and elongation; resistant to impact, water hammer and ground settlement, not easy to crack during transportation, installation and operation.

• Long Service Life: Designed service life exceeds 100 years under normal conditions, delivering outstanding long-term value and low lifecycle cost.

• Superior Corrosion Resistance: Standard external protection: zinc coating + bitumen / epoxy seal. Internal lining: cement mortar or epoxy, effectively resisting soil and water corrosion.

• Reliable Sealing & Easy Installation: Widely uses push‑on joint, flexible joint or flanged connection. Strong adaptability to foundation deformation, low leakage rate and fast construction.

• Stable Hydraulic Performance: Smooth inner surface reduces friction loss and energy consumption; flow capacity remains stable over decades.

Manufacturing Process

Production follows strict centrifugal casting technology: melting → spheroidization → centrifugal casting → annealing → machining → anti-corrosion coating → inspection. Products comply with international standards including ISO 2531, EN 545/598, AWWA C151.

Typical Applications

• Potable water transmission and distribution

• Wastewater and sewerage systems

• Urban gas pipeline networks

• Industrial process piping

• Mining, irrigation and hydraulic engineering