NSF/ANSI 61 Certified Potable Water Tank Lining

NSF/ANSI 61 is a recognized health-effects standard for materials and components that contact drinking water. For tank linings, it helps confirm that properly tested materials are suitable for potable water contact and do not leach contaminants above allowed limits. A potable tank lining project should use systems selected for the tank’s water chemistry, operating conditions, and compliance requirements.

A tank lining protects the interior surface of an FRP storage tank and helps maintain the integrity of the vessel. In potable water service, the lining provides a clean water-contact barrier, restores worn or damaged corrosion surfaces, reduces the risk of leaks or contamination pathways, and can extend the tank’s useful life without full replacement.

NSF/ANSI 61 requirements apply to materials, coatings, linings, and components that come into contact with drinking water. They focus on health effects, including chemical extraction and contaminant limits. For potable tank lining, the selected resin and lining system should be appropriate for water contact, installed according to procedure, cured correctly, and inspected before return to service.

Signs include spidering, disbondment, abrasion wear, emulsification, soft liner areas, low Barcol hardness, visible cracking, weeping, or evidence of capillary migration beneath the corrosion coat. American Fiberglass Tank Repair uses visual inspection plus ultrasonic, laser, and high-intensity backlight testing to determine whether targeted repair or full relining is the best option.

Yes. AFTR routinely schedules tank inspection, repair, and relining around planned shutdowns, night shifts, weekends, and operational windows. This helps facilities reduce downtime while still allowing the tank to be taken out of service, prepared properly, relined, cured, inspected, disinfected when applicable, and returned to service in a controlled sequence.

Relining is often far less disruptive than replacement because the existing FRP vessel can remain in place on its foundation or installed location. It helps avoid new tank lead times, removal logistics, and major capital expense. A proper inspection determines whether the tank structure is suitable for repair and whether relining can safely extend service life.

AFTR inspections can include interior and exterior visual evaluation, ultrasonic testing, laser methods, high-intensity backlight testing, and Barcol hardness checks. Inspectors look for liner deterioration, shell distortion, nozzle interface issues, abrasion, emulsification, stress cracking, and capillary migration so the repair scope addresses both visible and hidden conditions.

American Fiberglass Tank Repair provides field service across all 50 U.S. states, including Hawaii and Puerto Rico, as well as Canada, Mexico, the Caribbean, and select international situations. Crews are equipped for routine maintenance, planned outages, and emergency response, with materials and Service-Pack resources designed for efficient mobilization.