ISO2531-2009 C-Class ductile iron pipes are defined based on the allowable working pressure class. They strictly adhere to the international standard ISO 2531 as well as the national standards GB/T 13295-2019 and GB/T 26081-2022. The recommended pressure classes are C25, C30, and C40, corresponding to working pressures of 2.5 MPa, 3.0 MPa, and 4.0 MPa, respectively.

Product Specifications:

DN80–DN2600

Joint Type:

T-type flexible joint

Anti-Corrosion Methods:

Internal Coating: Cement lining

External Coating: Zinc layer + paint layer

Product Applications:

Water supply

Drainage

Recycled water

Firefighting

Heating supply

Effective Length:

6 meters

Usage Scenarios:

Urban water supply networks

Urban firefighting networks

Urban stormwater and wastewater networks

Long-distance water transfer from reservoirs and water plants

Recycled water networks for wastewater treatment plants and power plants

Heating networks

Product Parameters

Pressure-Rated Pipes
The C-class standard reduces raw material consumption while fully meeting usage requirements. It optimizes production processes, enhances product quality, and increases the cost-effectiveness of the pipes. Additionally, it has passed third-party inspections organized by the National Steel Product Authority, receiving full recognition and approval for both mechanical performance and casting quality.

Superior Anti-Corrosion Performance
The zinc coating application has been increased from 130 g/㎡ to 200 g/㎡, enhancing the adaptability of ductile iron pipes to various soil environments and significantly extending their service life.

Hygienic Cement Lining
Cement mortar lining technology is employed for internal corrosion protection, ensuring the safety of water quality during transportation and improving the operational efficiency of the pipeline network.