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Home Products Ductile Iron Pipe Ductile Iron Pipe -‌ Industrial Fluid Transportation | Wear-Resistant & Pressure-Resistant Pipe | Haierde
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Ductile Iron Pipe -‌ Industrial Fluid Transportation | Wear-Resistant & Pressure-Resistant Pipe | Haierde

Manufactured from high-strength ductile iron via centrifugal casting. Internal cement mortar lining and external asphalt/epoxy coating greatly improve pressure resistance, seismic performance and service life. Ideal for drainage under municipal arterial roads, heavy-load roads, high-rise buildings, civil air defense projects, pipe galleries and high-temperature drainage areas

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Product Details

Advantages of Haierde Ductile Iron Pipe

  • High toughness & high temperature resistance: Rigid metal structure resists deformation under deep backfill and tolerates high-temperature drainage, overcoming defects of plastic pipes such as easy flattening, fire susceptibility and poor high-temperature resistance
  • Internal & external anti-corrosion treatment: Resists acid, alkali and sewage erosion with a service life of over 50 years under normal use.

Why Choose Haierde Ductile Iron Pipe?

  • Strict quality standards: Complies with national standards and CMA test reports are provided.
  • Full-size service: Complete pipe specifications to guarantee project progress.
ItemTechnical IndexRemarks
Executive StandardGB/T 26081-2022Complies with national standard
Nominal Outer DiameterDN80-DN2600Custom available
Nominal Pressure Grade (PN)PN10(1.0MPa)/PN16(1.6MPa, common for municipal works)/PN25(2.5MPa)/PN40(4.0MPa)Select based on working conditions
Pressure Grade Class C (2026 New Standard, former K9 grade mainstream)C25-2.5MPa (common, ≥DN700)

C30-3.0MPa (common, DN350~600)

C40-4.0MPa (common, ≤DN300)

Also applicable for gravity flow pipelines
Connection MethodFlexible socket joint with rubber ring / Flange joint / Mechanical jointReliable tightness
Standard Length6 m per piece-

Frequently Asked Questions

Q1: What does K9 mean? How to understand the new Class C standard?

A: K9 is the old wall thickness grade widely used in engineering. The 2026 new national standard cancels Class K and adopts Class C. For pipes within DN300, K9 is equivalent to C40; medium and large diameters correspond to C25/C30, and PN16 is commonly used for conventional projects.

Q2: Can ductile iron pipes, steel wire mesh skeleton composite pipes and PE pipes be stored outdoors?

A: Steel wire mesh skeleton composite pipe: Cover with tarpaulin to avoid long-term sun exposure.

Ductile iron pipe: Allowed for outdoor storage with pipe orifices protected.

Q3: Will it crack during construction in low winter temperatures?

A: Ductile iron has relatively high brittleness; avoid heavy impact in cold winter.

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