Large Diameter Solutions
Large-diameter ductile iron pipe engineered for high-pressure bulk water transmission, raw water mains, and major infrastructure projects. Available with flexible push-on joints or restrained joint systems for demanding installation conditions.
Product Features
Large-diameter manufacturing capability: Dedicated production line capable of centrifugally casting pipes up to DN2600, meeting the demands of major water transmission infrastructure.
High-pressure performance: Multiple pressure classes available up to PN35, enabling application in high-head transmission mains and gravity-fed systems with substantial elevation changes.
Joint system versatility: Options include T-type push-on joints for standard buried installation, K-type restrained joints for thrust-resistant applications, and self-anchoring systems for trenchless installation methods.
Structural strength and impact resistance: Ductile iron metallurgy provides superior mechanical properties compared to alternative large-diameter pipe materials, with inherent resistance to impact loads and pressure surges.
External corrosion protection: Fusion-bonded epoxy coating (minimum 300 microns) or zinc-rich primer with epoxy topcoat per ISO 8179, providing extended service life in aggressive soil conditions.
Internal lining: High-performance cement mortar lining per ISO 4179 ensures sustained hydraulic efficiency and protection of water quality.
Heavy-duty handling: Designed with reinforced socket geometry and lifting provisions to accommodate the substantial weight of large-diameter pipe sections during transport and installation.
Key Applications
Municipal Water Systems
Transport drinking water safely. Distribute firefighting water reliably.
01
Wastewater Networks
Move industrial sewage efficiently. Resist chemical corrosion completely.
02
Mining Operations
Handle slurry transport perfectly. Withstand abrasive materials easily.
03
Power Plants
Circulate cooling water effectively. Support thermal operations reliably.
04
Irrigation Projects
Deliver agricultural water consistently. Serve large farming areas.
05
Product Parameters Table
|
Parameter |
Specification |
|
Product Name |
Ductile Iron Pipe |
|
Size Range (DN) |
DN1600 - DN2600 |
|
Material |
Ductile Iron |
|
Joint Type |
T-Type / K-Type / Flanged |
|
Standard Length |
6 meters |
|
Pressure Class |
K9 / C25 / C30 |
|
Internal Lining |
Cement Mortar |
|
External Coating |
Zinc-Aluminum + Bitumen |
|
Standard |
GB/T 26081, ISO 2531 |
|
Maximum Pressure |
2.5 MPa |
Media Compatibility
Suitable for potable water, raw water, treated sewage, and industrial cooling water. For aggressive media or specialized applications, alternative internal linings such as epoxy or polyurethane are available.
Quality Assurance
Our factory covers 300 acres. We employ 800 skilled workers. Our team includes 20 managers. We have 36 quality specialists. Our investment exceeds 600 million yuan. We hold multiple certificates. All products meet strict standards.
Materials
Pipe body: Ductile iron grade EN-GJS-400-15 or EN-GJS-450-10 (ISO 1083 / ASTM A536)
Gasket: EPDM (drinking water approved) for T-type and K-type joints
Restraint components (if applicable): Stainless steel SS304 or SS316 locking segments
External coating: Fusion-bonded epoxy (FBE) per ISO 8179, or zinc-rich primer with epoxy topcoat
Internal lining: Cement mortar per ISO 4179 / EN 545
Performance Testing
Hydrostatic pressure testing: Each pipe length subjected to factory pressure test per ISO 2531 / EN 545 requirements, with test pressure 1.5 times nominal pressure
Mechanical property verification: Tensile strength, yield strength, and elongation testing per batch to verify compliance with ISO 1083
Microstructure analysis: Metallographic examination to confirm nodularity percentage and graphite structure
Coating inspection: Holiday detection, thickness measurement, and adhesion testing for external coatings
Quality Assurance
Lining inspection: Thickness verification, surface finish assessment, and adhesion testing for cement mortar lining
Joint integrity testing: Assembly and pressure testing of joint systems to verify sealing performance
Third-party inspection: Available upon request with SGS, BV, or customer-designated inspection agencies
Material traceability: EN 10204 Type 3.1 certification provided for each production batch
