Understanding EN598 Standard for Ductile Iron Pipes | Wastewater Projects

Introduction to EN598 Ductile Iron Pipes

EN598 is a European standard that specifies the requirements for ductile iron pipes, fittings, accessories, and their joints used in sewerage and wastewater systems. This standard ensures durability, corrosion resistance, and watertightness under challenging underground conditions.

Unlike EN545, which is designed for potable water pipelines, EN598 focuses on wastewater and sewer systems, where chemical exposure, pressure variation, and soil corrosion require higher performance.

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Technical Requirements of EN598 Pipes

EN598 outlines several critical technical requirements for ductile iron pipes:

Internal Lining Options

• Epoxy coating: Standard protection for general wastewater.

• Polyurethane lining: Recommended for aggressive chemical effluents.

External Coating Types

• Zinc or zinc-aluminum: Resists soil corrosion.

• Bitumen coating: Enhances long-term durability.

Jointing Systems

• Push-fit (Tyton): Fast and watertight installation.

• Flanged joints: For high-pressure or mechanical connections.

• Restrained joints: Prevents separation under ground movement.

Pressure Ratings & Dimensions

• Pressure classes: PN10, PN16, PN25.

• Nominal diameters: DN80–DN2000.

Testing and certification include hydrostatic pressure, bending resistance, and coating adhesion checks to ensure compliance with EN598:2007 and ISO 2531 standards.

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EN598 vs EN545 — Key Differences

EN598 is specifically designed for wastewater pipelines, offering superior chemical resistance and durability in harsh underground environments.

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Applications of EN598 Ductile Iron Pipes

EN598 ductile iron pipes are widely used in:

• Municipal sewage networks: Urban drainage and underground pipelines.

• Industrial wastewater systems: Factories and chemical plants.

• Stormwater and combined systems: Rainwater management and mixed flow systems.

• Pipeline rehabilitation projects: Replacement of aging concrete or PVC pipes.

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Advantages of EN598 Ductile Iron Pipes

• High mechanical strength: Handles high soil pressure and external loads.

• Superior corrosion and abrasion resistance: Long-term reliability in aggressive wastewater.

• Long service life: Typically exceeds 50 years.

• Easy installation: Push-fit joints reduce construction time.

• Eco-friendly: Fully recyclable and environmentally sustainable.

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How to Select the Right EN598 Pipe

When choosing EN598 pipes, consider:

1. Diameter and pressure class: Based on system design.

2. Internal lining type: Epoxy for standard wastewater, polyurethane for chemical resistance.

3. External coating: According to soil conditions.

4. Joint type: Push-fit, flange, or restrained joints.

5. Supplier certification: Ensure EN598:2007 and ISO 2531 compliance.

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Why EN598 Remains the Trusted Standard

EN598 ductile iron pipes have been the preferred choice for wastewater infrastructure for decades, due to their strength, corrosion resistance, and sustainability. Choosing EN598-certified products ensures long-term performance, safety, and compliance with environmental standards, making them an ideal solution for modern sewer systems.

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