Pipe Lining and Pipe Coating: What are They?
Before diving into the differences between pipe lining and pipe coating, let’s first define what they are. Pipe lining and coating are both methods used to repair or improve the condition of underground pipes such as sewer lines, stormwater pipes, and water mains. Pipe lining refers to the process of creating a new pipe within the existing one, while pipe coating involves adding a layer of protective material to the inside of the pipe’s existing surface.
Materials Used
One of the significant differences between pipe lining and pipe coating is the materials they use. Pipe lining often involves using a resin-saturated felt tube that’s inserted into the damaged pipe to create a new one. The liner is then cured with hot water or steam, causing the resin to harden into a new, solid plastic pipe inside the old one. Pipe coating, on the other hand, involves spraying or brushing a liquid coating of epoxy, urethane, or other polymeric materials inside the existing pipe.
Level of Structural Support
Pipe lining provides substantial structural support, as it creates a new pipe within the old one. The new pipe made of resin is typically as strong or stronger than the old one, and often provides an increase in flow capacity as well, increasing the overall efficiency of the pipe. Pipe coating, however, only adds a thin protective layer and doesn’t provide significant structural support.
Pipe Size Limitations
While pipe lining can be used on pipes of various sizes, it’s limited in larger sizes, making it difficult to use for pipes beyond about 48 inches in diameter. Pipe coating, on the other hand, can be applied to pipes of any size and shape, making it a more versatile solution in instances where larger pipes must be repaired.
Application Time
Another factor that sets these two options apart is the amount of time they take to apply. Pipe lining typically requires more preparation work, as any obstructions in the pipes must be cleared before the liner can be inserted and cured. Once the liner is in place, it must cure for several hours or even days before the new pipe is fully formed. Pipe coating, on the other hand, doesn’t require much time in terms of preparation, and the process of applying the coating is generally quick.
Costs Involved
Because pipe lining requires more preparation and specialized equipment, it often comes with a higher price tag than pipe coating. The cost of pipe lining varies depending on the size of the pipe, and it can be more expensive for pipe sections with multiple bends, as these require longer lining tubes. Pipe coating, on the other hand, is generally less expensive because it’s less labor-intensive and requires less equipment.
Durability
Both pipe lining and pipe coating are designed to improve the longevity of pipes, but pipe lining typically provides a more durable long-term solution. Pipe lining, once cured, is a solid piece of plastic and provides excellent resistance to corrosion, cracking, and tree root intrusion. Pipe coating, while providing some protection, doesn’t provide the same level of durability as pipe lining.
Maintenance
When it comes to maintenance, both pipe lining and pipe coating require some upkeep, but pipe coating requires more frequent maintenance. Because the coating is a layer on the inside of the pipe, it may eventually wear away over time, and the coating may need to be reapplied to maintain proper protection. Pipe lining, on the other hand, is a solid piece of plastic and doesn’t require the same level of ongoing maintenance.
Installers Needed
Finally, the type of installers required for pipe lining and pipe coating is different. Pipe lining typically requires specialized installers with experience in epoxy lining techniques, while pipe coating is less complex and can be done by trained professionals without specialization.
Conclusion
When deciding between pipe lining and pipe coating, it’s essential to consider factors like the size of the pipe, the level of structural support needed, durability, and costs involved. Both methods offer benefits and drawbacks, and picking the right choice depends on the unique needs and situation at hand. Consulting with professionals can help you to make the best decision and ultimately improve the longevity and efficiency of your pipes.