The Thompson Pipe Group facility in Bakewell, Tennessee, manufactures and metalizes steel joint rings. These rings are used in all Thompson facilities to produce prestressed concrete cylinder pipe (AWWA C301) and bar-wrapped pipe (AWWA C303). The use of zinc metallized
rings provides corrosion protection for the steel joint rings and eliminates the need to mortar point the interior joints on water and treated wastewater lines.
Zinc metalizing provides corrosion protection for the steel in two ways: as a barrier and
through galvanic action.
