The service life and performance of CIPP liners depend on the materials used and environmental conditions. These liners, typically designed for 50+ years with proper installation, are made from thermosetting resins like polyester, vinyl ester, or epoxy. They are impregnated into non-woven felt or fiberglass to create a seamless, jointless pipe within the existing one. This enhances structural integrity, reduces infiltration and exfiltration, and restores hydraulic capacity. Their resistance to corrosion, abrasion, and chemical attack ensures longevity, making them an effective solution for rehabilitating aging or damaged pipelines.
Performance characteristics of CIPP liners are primarily defined by their mechanical properties, such as tensile strength, flexural strength, and modulus of elasticity. These properties enable the liner to withstand internal and external pressures, ground movements, and dynamic loads without compromising its integrity. Liners also exhibit excellent resistance to microbial-induced corrosion (MIC), crucial in wastewater applications. A low roughness coefficient of the cured surface enhances flow capacity, reducing long-term operational costs. Adherence to industry standards like ASTM F1216 and F1743 ensures that CIPP liners meet stringent quality and performance benchmarks.
