November 7, 2025

Stainless steel tanks are often considered long-lasting and maintenance-free. However, even high-grade stainless steel can wear down under real operating conditions. When corrosion or water quality issues begin appearing, installing an internal tank liner is one of the most reliable ways to restore performance and extend the lifespan of the tank. This article explains when stainless steel tanks need liners, what signs to look for, and how relining works, based on the approach used by Raven American Tanks across the United States. Why Stainless Steel Tanks can Still Corrode Stainless steel resists corrosion, but it is not immune to it. Over time, water chemistry, temperature, and environmental exposure can weaken internal surfaces. Common factors that cause internal corrosion Corrosion usually starts as microscopic pitting. Once pitting forms, it can spread, leading to discoloration, leaks, and contamination risks. Signs that a Stainless Steel Tank may Need a Liner Early detection helps avoid costly replacements. Look for these indicators: If any of these symptoms appear, lining the tank is often more effective than repeated cleaning or temporary patching. When a Liner is Essential for Potable Water Safety Potable water storage in the United States is regulated under NSF/ANSI and state-level safety standards. If a stainless steel tank corroded internally, even slightly, small amounts of metal can enter the water. Installing a certified potable-grade liner supports safe drinking water storage in: A liner creates a smooth, clean internal surface that is easier to sanitize and maintain. Common Types of Tank Liners used in the United States Different liners suit different operating conditions. Raven American Tanks installs custom liners based on water chemistry and site requirements. Typical liner options: The goal is to select material that matches both the stored liquid and the tank environment. If your site uses modular panel-style tank systems, you may also be working with stainless steel panel tank construction, which has unique internal geometry and requires custom-fitted liner fabrication. Learn more about how these tanks. How Relining is Performed by Raven American Tanks Relining replaces the internal contact surface while keeping the existing tank structure. Standard process: This method reduces downtime and avoids the high cost of full tank replacement. Raven American Tanks provides full-service tank relining and restoration. Raven American Tanks provides full-service tank relining and restoration Benefits of Installing a Liner in a Stainless Steel Tank For many sites, relining is a practical and economical upgrade. Why Work with Raven American Tanks Raven American Tanks provides tank relining services across the United States, supporting potable water systems, industrial facilities, agriculture, mining operations, and commercial properties. Our team fabricates liners to precise tank measurements and installs them on-site with minimal operational disruption. If your stainless steel tank is showing signs of interior wear, relining may be the right approach. Request an Assessment To schedule a tank inspection or discuss relining options, contact Raven American Tanks. Our team will help determine whether a liner is needed and recommend the most suitable material for your application.