Products Description
C20 grade ductile iron pipe engineered for water transmission and infrastructure projects. Manufactured with controlled centrifugal casting technology, offering reliable strength, dimensional accuracy, corrosion protection, and customized supply solutions for global engineering applications.

Key Technical Specifications
| Item | Specification |
|---|---|
| Product Type | C20 Grade Ductile Iron Pipe |
| Material | Ductile Cast Iron |
| Manufacturing Method | Centrifugal Casting |
| Grade Classification | C20 |
| Diameter Range | DN80 – DN2600 |
| Standard Length | 6 Meters |
| Connection Type | Push-on Joint / Flanged Joint / Mechanical Joint |
| Pressure Class | C20 / Customized Pressure Requirement |
| Internal Lining | Cement Mortar / Epoxy Coating |
| External Protection | Zinc Coating / Bituminous Coating |
| Application | Water Transmission & Infrastructure Projects |
| Trade Term | FOB Price Available |
| Minimum Order Quantity | 10 Pipes (6m Each) |
Product Features
C20 grade performance for engineering applications
C20 grade ductile iron pipe is designed for projects requiring dependable mechanical strength and stable pressure performance. The material structure provides excellent durability for long-term water transmission and infrastructure systems.
Advanced centrifugal casting manufacturing
The centrifugal casting process helps achieve uniform pipe structure and consistent wall thickness. Controlled manufacturing technology improves product reliability and supports stable operation under different installation environments.
Strong resistance against external loads
During underground installation, pipes are exposed to soil pressure, traffic loads, and environmental conditions. C20 ductile iron pipes provide excellent load-bearing capability to maintain pipeline integrity.
Smooth internal lining for efficient flow
The internal surface treatment reduces friction resistance and helps maintain hydraulic efficiency. This supports smoother water transportation and reduces unnecessary energy consumption in pumping systems.
Multiple connection options for project flexibility
Different connection solutions are available according to engineering requirements:
Push-on flexible joint
Flanged connection
Mechanical connection
These options allow easier installation in various project conditions.
Long-term value for infrastructure owners
C20 ductile iron pipes provide a balanced solution between structural performance, installation convenience, and maintenance requirements, making them suitable for large-scale water engineering projects.
Customized production support from manufacturer
We accept customized requirements including:
Pipe dimensions
Coating systems
Connection types
Marking requirements
Packaging solutions
Professional technical support is available for different international projects.
Application
| Project Type | Application |
|---|---|
| Municipal Water Projects | Main water transmission pipelines |
| Urban Infrastructure | City water distribution networks |
| Water Treatment Plants | Raw water and treated water transportation |
| Industrial Parks | Utility water pipeline systems |
| Agricultural Irrigation | Long-distance water supply |
| Fire Protection Projects | Dedicated water supply networks |
Materials
| Component | Specification |
|---|---|
| Pipe Body | Ductile Iron EN-GJS-450-10 |
| Graphite Structure | Spheroidal Graphite Iron |
| Internal Coating | Cement Mortar / Epoxy |
| External Coating | Zinc / Bitumen Protection |
| Rubber Seal | EPDM / NBR |
Dimensions
| Nominal Diameter | Length | Pressure Grade | Connection Type | Weight |
|---|---|---|---|---|
| DN80 | 6m | C20 | Flexible Joint | Available |
| DN100 | 6m | C20 | Flexible Joint | Available |
| DN150 | 6m | C20 | Flexible Joint | Available |
| DN300 | 6m | C20 | Customized | Available |
| DN500+ | Customized | Project Requirement | Customized | Available |
Accessories
Ductile iron pipe fittings
Elbows
Tees
Reducers
Flange adapters
Rubber gaskets
Connection accessories
Optional Configurations
Customized flange drilling
Special anti-corrosion coating
Customer logo marking
Export wooden cases
Project documentation
Performance Testing
Each C20 ductile iron pipe is inspected before shipment.
Quality control procedures include:
Raw Material Testing
Chemical composition analysis
Material verification
Mechanical performance testing
Production Inspection
Pipe dimension measurement
Surface inspection
Coating thickness inspection
Final Testing
Hydrostatic pressure test
Leakage performance test
Visual inspection
Quality documents:
Material certificate
Inspection report
Factory test record
Compliance documents
Third-party inspection is available according to customer requirements.




