Ductile Iron Pipe

Ductile Iron Pipe

Ductile iron material has with carbon steel close to the mechanical properties, suchas high mechanical strength, good toughness, etc,, at the same time has the castiron unique corosion resistance, gradually become the worid's water supply and drainage engineering projects in the field of the most safe and rellable pipe.
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Product Performance

Performance Index Centrifugal Ductile Iron Pipe Ordinary Gray Iron Pipe Steel Pipe
Tensile Strength (N/mm²) ≥420 150–260 ≥400
Bending Strength (N/mm²) ≥590 200–360 ≥400
Elongation (%) DN800: ≥10 Neglect ≥18
DN1100–2600: ≥7
Coefficient of Elasticity (N/mm²) About 16×10⁴ About 11×10⁴ About 16×10⁴
Hardness (HB) ≤230 Neglect ≥140

Pipe Materials: Pipeline Failure Rate in the Earthquake

Pipe Material Pipeline Failure Rate (%)
Centrifugal Ductile Iron Pipe 0.04
Ordinary Gray Iron Pipe 0.17
Plastic Pipe 1.17
Steel Pipe 1.24


Nominal Diameter and Hydraulic Test Pressure

Nominal Diameter (DN) Hydraulic Test Pressure (MPa)
80 ≤ DN ≤ 300 5
350 ≤ DN ≤ 600 4
700 ≤ DN ≤ 1000 3.2
1100 ≤ DN ≤ 2000 2.5
2200 ≤ DN ≤ 2600 1.8

"According to the relevant seismic research data, the centrifugal ductile iron pipe in the earthquake breakage rate is 1/4 of the gray iron pipe, and 1/30 of the pipeline of other materials."


Ductile Iron Pipe Production Process

Ductile Iron Pipe Production Process
1.Spectral Analysis – Analyze raw materials.
2.Blast Furnace Iron – Melt and refine iron.
3.Electric Furnace Tempering – Adjust composition.
4.Centrifugal Foundry – Mold pipes.
5.Spheroidization Treatment – Improve ductility.
6.High-Temperature Annealing – Relieve stress.
7.Exterior Zinc Spraying – Apply zinc coating.
8.Polishing – Polish socket and spigot.
9.Hydraulic Test – Test strength under pressure.

10.Packaging – Pack pipes for shipment.


Ductile Iron Pipe Production Process


Ductile Iron Pipe Standard

T-Type Interface Centrifugal Ductile Iron Pipe Weight Table

(K9 Grade - Standard Effective Length 6 Meters)


Nominal Diameter DN (mm) Wall Thickness (mm) Tolerance (mm) Straight Part Weight (kg/m) Socket Weight (kg) Total Weight (kg)
80 6 -1.30  12.2 3.4 77
100 6 -1.30  15.1 4.3 95
125 6 -1.30  18.3 5.7 119
150 6 -1.30  21.9 6.8 143
200 6.3 -1.50  30.6 10.3 194
250 6.8 -1.55 40.2 14.2 255
300 7.2 -1.6 50.8 18.9 323
350 7.7 -1.65 63.2 23.7 403
400 8.1 -1.7 75.5 29.5 482
450 8.6 -1.75 89 38.3 577
500 9 -1.80  104.3 42.8 669
600 9.9 -1.90  137.3 59.3 882
700 10.8 -2.00  173.9 79.1 1123
800 11.7 -2.10  215.2 102.6 1394
900 12.6 -2.20  260.2 129 1691
1000 13.5 -2.30  309.3 161.3 2017
1100 14.4 -2.40  362.8 194.7 2372
1200 15.3 -2.50  420.1 237.7 2758
1400 17.1 -2.70  547.2 385.3 3669
1500 18 -2.80  619.1 460.4 4175
1600 18.9 -2.90  690.3 526.2 4668
1800 20.7 -3.10  850.8 698.2 5803
2000 22.5 -3.30  1027.8 876.2 7043
2200 24.3 -3.50  -- -- 8332
2400 26.1 -3.70  -- -- 9822
2600 27.9 -3.90  -- -- 11392



Characteristics of ductile iron pipes


(1) Pressure bearing performance

Water supply pipes are usually buried underground and are inevitably affected by loads from the land and vehicles. Ductile iron pipes have the nature of iron and the properties of steel, which can ensure that the pipes can effectively resist external loads and are more economical to lay;

(2) Hydraulic performance

During peak water use, ductile iron pipes can withstand higher internal pressures; in addition, the inner lining of ductile iron pipes is smooth and uses cement mortar lining, with an equivalent roughness K value of 0.030 mm;

(3) Sealing performance

Ductile iron pipes use flexible interfaces. After rigorous sealing tests, they can effectively prevent various forms of penetration and erosion and significantly reduce the leakage rate of pipeline interfaces;

(4) Anti-corrosion performance

Cement mortar lining is often used for internal anti-corrosion of ductile iron pipes, and zinc spraying + asphalt spraying finishing layer is used for external anti-corrosion, which can effectively isolate the erosion of poor water quality and corrosive soil.

ductile iron pipesductile iron pipes

Ductile Iron Pipes Supplier and Manufacturer

Ductile Iron Pipes: Strong, Reliable, and Built to Last

Combining the strength of carbon steel with the corrosion resistance of cast iron, ductile iron pipes are the top choice for water supply and drainage systems worldwide.

At BAOWI STEEL, we offer premium-quality ductile iron products backed by a global service network. From pre-sales consultation to after-sales installation guidance, our one-stop service ensures efficiency and reliability at every step.

Choose BAOWI STEEL for durable, sustainable, and cost-effective piping solutions trusted by professionals worldwide.

Ductile Iron Pipes/ Water Infrastructure/ Sustainable Piping Solutions /BAOWI STEEL /Reliable Pipe Supplier
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Recruiting Agents, contact: info@baowi-steel.com

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