Guoming Ductile Iron Pipes Co., Ltd. | Leading Manufacturer in China

About Guoming Pipe

Guoming Ductile Iron Pipes Co., Ltd. (referred to as "Guoming Pipe") is a holding company under Jigang Group Co., Ltd. Established in Lanling County, Linyi City, Shandong Province, it is a high-tech enterprise re-established and rebuilt through modern methods.

The company focuses on the R&D, production, and sales of ductile iron pipes and is one of the most comprehensive manufacturers in China, offering 26 specifications from DN80 to DN2600mm.

Guoming Pipe has won multiple awards including "Cast Pipe Industry Brand", "Shandong Famous Brand Product", and National "High-tech Enterprise".

View Our Products

Our Products

Ductile Iron Pipes

DN80–DN2600mm, centrifugal cast, ISO2531 compliant. Ideal for water and sewage systems.

26 standard sizes
Internal cement mortar lining
External zinc + bitumen coating
Push-on or mechanical joint options

Ductile Iron Fittings

Elbows, tees, reducers, flanges, and special joints for complete pipeline systems.

DN80–DN1200 range
Standard and custom designs
Tested for high pressure
Compatible with major joint systems

External Coatings

Zinc spray (130–200 g/m²) + bituminous paint for superior corrosion protection.

ISO 8179-1 compliant
Enhanced durability in aggressive soils
50+ year service life
Custom coating options

Rubber Sealing Rings

EPDM or SBR rings for push-on joints. Ensures leak-free, flexible connections.

DN80–DN2600 compatibility
High elasticity and aging resistance
Safe for potable water
ISO 4633 certified

Mechanical Joint Pipes

For high-pressure or restrained applications. Includes flanged and TYTON joints.

Up to 50 bar working pressure
Earthquake and ground movement resistant
Easy installation and maintenance
ASTM A716 compliant

Cement Mortar Lining

ISO 4179 compliant internal lining for clean water transmission and corrosion control.

Smooth hydraulic surface
Prevents biofilm formation
Long-term water quality protection
Centrifugally applied and cured

Large Diameter Pipes (DN1000+)

Specialized production for major infrastructure: DN1100, DN1200, DN2000, DN2600.

Used in national water projects
Reinforced joints and supports
Custom wall thickness options
Global export experience

Custom Pipe Solutions

Tailored designs for unique engineering needs: special lengths, coatings, and fittings.

Engineering support available
Prototyping and testing
OEM and project-specific batches
Global logistics coordination

Why Choose Guoming Pipes?

ISO2531 Certified

All products manufactured to international standards ensuring accuracy, safety, and reliability.

63-Year Legacy

Rooted in Jigang Group’s history since 1957, we bring decades of expertise to every project.

Green Manufacturing

Low-carbon, clean production with desulfurization, dust control, and waste recycling systems.

Global Projects

Successfully delivered to Greece, Mauritania, South Africa, Vietnam, and across China.

Global Case Studies

Greece Water Supply

DN1100–DN1200 pipes for national water transmission. High-pressure resistance and corrosion protection ensured long-term reliability.

Mauritania Water Project (South)

DN200–DN500 ductile iron pipes installed in arid regions. Coatings designed for extreme soil conditions.

South Africa Urban Supply

DN900–DN1000 pipes for municipal water network. Leak-free performance under variable pressure.

Mauritania Water Project (North)

DN400–DN500 pipes with mechanical joints for seismic resilience in remote areas.

Vietnam Water Supply

DN1000 large-diameter pipes for intercity water transmission. Fast delivery and installation support.

Yixing, China Sewer Project

DN800 sewage pipes with enhanced internal lining for wastewater corrosion resistance.

Frequently Asked Questions

What standards do your pipes meet?

Our ductile iron pipes are manufactured in compliance with ISO2531, ISO 4179 (lining), and ISO 8179-1 (coatings).

What diameters do you produce?

We produce centrifugal ductile iron pipes from DN80 to DN2600mm, covering 26 standard specifications.

Do you offer custom fittings?

Yes, we manufacture custom ductile iron fittings including elbows, tees, reducers, and flanges to project specifications.

What is your production capacity?

We are capable of producing over 1,000,000 tons of cast iron products annually.

How do you ensure environmental compliance?

We follow a "low-carbon, clean, green" philosophy with seven environmental systems including desulfurization, dust removal, and noise reduction.

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