Polyurethane Lining
For service conditions where cement mortar is not appropriate, AMERICAN can provide a polyurethane lining in accordance with ANSI/AWWA C222. Polyurethane linings are typically applied at 20 mils minimum dry film thickness (DFT), but thicker lining is possible. Contact an AMERICAN representative regarding the feasibility of increased polyurethane lining thickness. Typical uses for polyurethane lining include septic sewers and industrial waste applications. Polyurethane lining certified in accordance with ANSI/ NSF Standard 61 is available in limited colors.
Polyurethane lining is applied in accordance with ANSI/AWWA C222 and the polyurethane manufacturer’s recommendations. It is spray-applied to the interior of the pipe after cleaning and blasting have been performed to achieve a properly prepared surface. Curing time and temperature are a function of the specific polyurethane type and formulation. After the lining has adequately cured, it is tested for conformance to the standard. These tests include verification of thickness, electrical holiday inspection to verify dielectric integrity, and pull-off testing to verify adhesion strength.