NSF/ANSI 61-compliant coating for municipal bolted water storage tanks

Water tanks commonly use potable-water-rated cementitious, epoxy, polyurethane, polyurea, or crystalline waterproofing systems, depending on the tank material and service conditions. For municipal drinking water tanks, the coating or lining should be appropriate for potable water contact and aligned with NSF/ANSI 61 requirements. AmTech evaluates steel or concrete substrates before specifying a compatible protective system.

Acid tank coatings must be selected according to the specific chemical, concentration, temperature, immersion exposure, and fill/draw cycles. AmTech commonly uses DuraChem 500 series polylining systems for corrosive, acidic, and alkaline chemical storage environments. The best system is determined after reviewing the stored product, tank substrate, prior failures, and required downtime window.

Concrete water tanks often benefit from crystalline waterproofing systems such as Port Seal or Xypex, especially where moisture migration, capillary seepage, cold joints, or micro-cracking are concerns. These materials become part of the concrete matrix and can reactivate with moisture. For potable water storage, system compatibility, surface condition, and applicable approvals should be reviewed before installation.

NSF/ANSI 61 addresses materials and products that contact drinking water, helping reduce the risk of contaminants leaching into potable water. For municipalities, compliance supports public health expectations, project specifications, and regulatory confidence. A tank coating system should be selected, prepared, and applied carefully so the finished lining supports water quality and long-term corrosion protection.

Yes, many bolted steel water tanks can be repaired and relined when the structure remains serviceable or can be restored. AmTech inspects corrosion, seams, panels, penetrations, and coating failure before recommending repair. Relining can extend tank service life, reduce capital expenditures, and avoid the longer downtime and disruption associated with full tank replacement.

Surface preparation is critical because even a high-performance coating can fail if rust, oxides, old lining, moisture, or contaminants remain on the substrate. AmTech verifies conditions such as surface profile, temperature, humidity, and dew point before application. Proper blasting or cleaning helps the new lining bond tightly and perform as intended.

Project duration depends on tank size, access, coating condition, corrosion level, repair scope, surface preparation method, lining system, inspection needs, and return-to-service requirements. AmTech’s process is built around minimizing facility downtime, using experienced field crews and proven lining systems to move efficiently from inspection through preparation, application, and verification.

Yes. AmTech provides emergency tank repair services for active leaks, corrosion breakthrough, lining failure, nozzle issues, structural cracks, and unexpected shutdowns. Crews can mobilize with repair materials such as PLS 755 Tank Tape, HydraStone and Alkrete cement linings, DuraChem polylining, and welding equipment to stabilize and restore tank integrity.