Cement mortar linings offer long-term corrosion protection at a cost-effective price and continue to be a trusted standard for potable water pipelines.

Cement mortar is widely used as an internal lining for steel pipes due to its ease of application, proven performance, and active corrosion protection. With a long-standing global track record, it is trusted for conveying potable water to required quality standards.

Key Benefits

• Simple Application – The mixing and installation process is straightforward, reducing risk and ensuring consistency.

• Active Corrosion Protection – A stable hydroxide film forms at the steel–mortar interface, protecting even areas with minor lining discontinuities.

• Long-Term Performance – Cement mortar linings have been used successfully for decades in water transmission systems worldwide.

• No Microbial Growth – The material does not support bacteria or biological buildup.

Application Process

1. A high-slump cement mixture is poured or pumped into a slowly rotating pipe.

2. The rotation speed is then increased to create centrifugal force, spreading the mortar to a uniform thickness.

3. Continued spinning removes excess water and compacts the lining into a dense, solid surface.

4. The lining is then cured using moist air or steam for accelerated curing.

Like concrete, minor drying cracks may appear, but they self-heal when the lining becomes wet. Moisture also causes the lining to swell, improving strength and adhesion. Additionally, cement mortar linings can increase the stiffness and structural resistance of steel pipes.

Performance Considerations

While cement mortar is highly effective, a few conditions may impact performance:

• Soft or highly chlorinated water may cause lining deterioration over time.

• Best suited for flow velocities of 20 feet per second or less.

• Low flow rates and prolonged water retention can lead to higher pH levels.

• The lining adds weight and slightly reduces internal flow volume.