Ductile iron pipes are an essential aspect of modern-day infrastructure by providing a reliable channel for transporting water and other fluids. In the water supply and sewage industries, ductile iron pipes are the primary choice due to their high-strength, durability, and resistance to corrosion. However, to ensure the pipes' longevity and protection, they require an external cement mortar coating.
The British Standards Institution (BSI), through the BS EN 15542 - Ductile iron pipes, fittings, and accessories - External cement mortar coating for pipes - Requirements and test methods, outlines the requirements and test methods for the external cement mortar coating on ductile iron pipes. This standard governs everything related to external cement mortar coating, including its thickness, adhesion, density, and mechanical resistance, among others.
So, what is the significance of the external cement mortar coating on ductile iron pipes?
1. Corrosion Protection
The external cement mortar coating provides resistance to corrosion to prevent the formation of rust and other corrosive agents on ductile iron pipes, which can weaken the structure over time. In harsh environments, pipes can be exposed to factors such as moisture, chemical reactions, and soil acidity, which can cause corrosion. The external cement mortar coating serves as a reliable barrier to such elements, keeping the pipes in good condition.
2. Longevity
Ductile iron pipes are known for their durability, and the external cement mortar coating enhances their longevity by providing additional protection. The coating's thickness prevents any mechanical damage during handling or installation, and its mechanical resistance ensures that it can withstand various soil and environmental conditions.
3. Efficiency
Ductile iron pipes with an external cement mortar coating have a smoother interior surface, improving the flow of water and other fluids. The smooth surface reduces friction, which translates to reduced energy and maintenance costs.
4. Aesthetic Appeal
The external cement mortar coating enhances the aesthetic appeal of ductile iron pipes by giving them a smooth, clean appearance. It also serves as an additional layer of insulation to prevent heat loss or gain, reducing energy costs.
In conclusion, the external cement mortar coating on ductile iron pipes is an integral part of the pipes' longevity, efficiency, and protection. The BS EN 15542 standard provides a comprehensive guide to ensure that the coating meets all the necessary requirements and is fit for purpose. As such, suppliers and contractors need to adhere to this standard when providing and installing ductile iron pipes to ensure that the infrastructure is robust and reliable.
Keywords: coated pipe accessory, ductile iron pipes, external cement mortar coating, BS EN 15542, corrosion protection, longevity, efficiency, aesthetic appeal, standard, infrastructure.