Ductile iron fittings

Ductile iron fittings: The definitive solution for water networks

In civil works, water supply or irrigation infrastructure projects, the reliability of every component is critical. A failure in the network not only involves repair costs, but can compromise safety and service. That is why the choice of material for joints and branches is one of the most important decisions. With more than 40 years of experience, at Grupo Almagro we know that ductile iron fittings are the superior solution, offering a unique combination of strength and flexibility that guarantees maximum longevity for your installation.

Why choose ductile iron fittings for your project?

Hydraulic engineering experts prefer ductile iron over materials such as PVC or steel for a set of decisive technical advantages. These fittings are not just connecting pieces; they are an investment in the durability and efficiency of the entire network.

Unbeatable mechanical strength

Ductile iron is designed to withstand the most demanding conditions. Its molecular structure gives it high tensile and impact strength, allowing it to withstand high pressures, loads from ground with heavy traffic and ground movement without deformation. While other materials may fracture, ductile iron maintains its integrity.

Durability beyond 50 years

Thanks to their exceptional corrosion resistance, especially with high-quality epoxy coatings, ductile iron fittings can exceed 50 years of service life with minimal maintenance. This longevity reduces the project's life-cycle costs and guarantees consistent performance, even in drainage networks exposed to chemical agents.

Guaranteed safety and watertightness

Ductile iron jointing systems, whether flanged, mechanical joint or restrained, are designed to create a perfect seal. This prevents leaks, minimises water losses—an increasingly valuable resource—and protects the environment from possible contamination.

Our complete range of fittings

At Grupo Almagro, we offer a complete range of ductile iron fittings and pieces. We organise our offering by joint type to make selection easier.

Flanged Fittings (Rigid Joints)

Ideal for connecting pipes to elements such as valves, pumps or meters. Flanged joints provide a robust connection and are easily dismantled for maintenance. They comply with UNE-EN 1092-2 for PN10 and PN16 pressures. Our range includes elbows, tees, crosses, reducing cones, blind flanges and dismantling joints.

Mechanical Joint Fittings (Flexibility)

Perfect for buried pipes, their design allows a certain degree of angular deflection without compromising the seal. This makes assembly in the trench easier and allows the pipe to adapt to minor ground settlement. We offer jointing sleeves, mechanical joint elbows and universal couplings.

Fittings for PVC Pipes

Designed to create reliable transitions between ductile iron networks and PVC pipes. They use Euro-type sockets and high-quality EPDM gaskets to guarantee a secure connection, offering maximum versatility in mixed-material projects.

Key applications in civil works and irrigation

Our experience of more than four decades is focused on the most demanding sectors. Grupo Almagro fittings are the backbone of countless projects in the following areas:

• Potable Water Supply Networks: We guarantee maximum safety and water quality thanks to our epoxy coatings approved for human consumption.

• Drainage and Wastewater Systems: The robustness of ductile iron makes it ideal for drainage networks, where materials are exposed to aggressive chemical conditions.

• Agricultural Irrigation Infrastructure: In the field, our fittings provide the reliability farmers need to optimise water use and secure their crops.

Certified quality: Our commitment

Our customers' trust is based on our commitment to quality. All fittings supplied by Grupo Almagro are manufactured in EN-GJS-500-7 (GGG-50) material and rigorously comply with the most demanding European standards:

• UNE-EN 545: The reference standard for ductile iron pipes and fittings in water pipelines.

• UNE-EN 14901: Specifies the requirements for epoxy powder coatings, ensuring the most effective anti-corrosion protection.

Frequently Asked Questions about ductile iron fittings

What advantages do they have over PVC or steel? Ductile iron is more impact-resistant than PVC and has greater corrosion resistance than steel, giving it a much longer service life with less maintenance.

What are the most common mistakes when installing them? The most frequent errors include inadequate pipe preparation, over-tightening of bolts and choosing the wrong fitting for the working pressure. It is essential to clean the surfaces and use a torque wrench.

When is a restrained joint necessary? They are indispensable at points where strong hydraulic thrusts are generated that could cause separation, such as at bends, reducers, line ends and sections with steep gradients.

What do the abbreviations PN10, PN16 and PFA mean? PN (Nominal Pressure) is an identifier for the pressure class in bar (PN10 = 10 bar). PFA (Allowable Operating Pressure) is the maximum pressure a component can withstand in continuous service.

Are they compatible with pipes from other manufacturers? Yes, our fittings follow strict European dimensional standards, which guarantees their compatibility with pipes from any manufacturer that complies with those standards.

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