In water supply and drainage engineering, municipal pipe networks, and industrial pipeline systems, ductile iron pipe has become an ideal substitute for traditional cast iron and steel pipes due to its excellent mechanical properties and corrosion resistance. Understanding the key technical parameters of ductile iron pipe is crucial for designers, purchasers, and construction companies, whether for water supply mains or sewage transportation. This article will take DINSEN ductile iron pipe as an example to systematically explain its specifications, weight, working pressure, and coating characteristics.
I. Ductile Iron Pipe Specifications and Dimensions: How to Determine the Model?
When selecting pipes, it is first necessary to clarify the ductile iron pipe sizes and dimensions. International standards are mainly based on ISO 2531 or EN 545, classified by nominal diameter (DN).
Taking DINSEN ductile iron pipe as an example, K9 grade (standard wall thickness level) pipes are commonly used, with nominal diameters ranging from DN80 to DN2000. Here are some common pipe sizes:
- DN80: Outer diameter 98mm, wall thickness 6.0mm
- DN100: Outer diameter 118mm, wall thickness 6.0mm
- DN200: Outer diameter 222mm, wall thickness 6.3mm
- DN400: Outer diameter 429mm, wall thickness 8.1mm
- DN1000: Outer diameter 1048mm, wall thickness 13.5mm
Different wall thickness grades (K8, K9, K10, K12) will affect the pressure-bearing capacity and unit weight of the pipe. Users can choose appropriately according to the design pressure.
II. Weight per meter of ductile iron pipe: How much does ductile iron pipe weigh?
A common question in engineering procurement is: How much does ductile iron pipe weigh? The weight of ductile iron pipe consists of the weight of the pipe body and the weight of the socket, directly affecting transportation, hoisting, and installation costs.
Taking DINSEN K9 grade ductile iron pipe (standard length 6 meters) as an example, the theoretical weight is as follows:
- DN100: Approx. 15.1 kg/m → 95 kg per pipe
- DN200: Approx. 30.6 kg/m → 194 kg per pipe
- DN300: Approx. 50.8 kg/m → 323 kg per pipe
- DN500: Approx. 104.3 kg/m → 669 kg per pipe
- DN800: Approx. 215.2 kg/m → 1394 kg per pipe
The actual weight may vary slightly due to factors such as zinc coating thickness and inner cement mortar lining. DINSEN can provide accurate weight calculation sheets for project budgeting and logistics planning.
III. Working Pressure of Ductile Iron Pipe
Ductile iron pipe has high tensile strength and circumferential compressive strength. Standard K9 grade ductile iron pipe typically has a working pressure of 16 bar (1.6 MPa), while higher wall thickness grades (such as K12) are suitable for pressure applications of 25 bar or even 40 bar.
DINSEN ductile iron pipes are manufactured strictly according to ISO 2531 standards. Each pipe undergoes a hydrostatic test before leaving the factory to ensure a safety factor 1.5 times higher than the design working pressure, making them particularly suitable for long-distance water transmission, pumping station riser pipes, and high-pressure industrial pipelines.
IV. Zinc Coating for Corrosion Protection
The Role of Zinc Coating on Ductile Iron Pipes One of the most critical protective measures for buried pipelines is zinc coating on ductile iron pipes. The zinc coating not only provides cathodic protection but also forms a composite anti-corrosion system with external paint or polyethylene sheathing.
DINSEN ductile iron pipes come standard with a ≥200 g/m² zinc coating (according to ISO 8179 standard), covered with a red epoxy asphalt or polyurethane finishing layer, significantly improving corrosion resistance and lifespan. For corrosive soils or high resistivity areas, additional zinc coating + PE film or full polyurethane coating are available, with a designed service life of 50-100 years.
V. Why Choose DINSEN Ductile Iron Pipes?
As a professional ductile iron pipe supplier, DINSEN offers a full range of specifications from DN80 to DN2000, supporting different wall thicknesses such as K8, K9, K10, and K12, and can customize lengths, inner linings (cement mortar/epoxy resin), and external corrosion protection solutions to meet customer needs.
All iron ductile pipes are ISO 2531 / EN 545 certified. Complete tables of weight, dimensions, working pressure, and zinc coating parameters are available. International export packaging and one-stop logistics services are supported.
For more detailed ductile iron pipe sizes and dimensions selection tables or weight calculation tools, please visit the DINSEN or contact the technical sales team directly.
Post time: Jun-01-2026
