Polyurethane Inner Liner for Grinding Machine

Polyurethane (PU) liners are used to provide corrosion protection in small diameter metallic pipelines and corrosion protection and semi-structural rehabilitation and leak protection in man-entry pipes, tunnels and manholes. As with cement mortar liners, polyurethane coatings require that the host pipe be thoroughly cleaned of hard deposits, nodules, scale, corrosion and other debris and be substantially dry prior to application of the coating to ensure good adhesion between the liner and the pipe wall. See Cement Mortar Lining for discussion of cleaning technologies.

Polyurethane spray-on liners, like cement mortar, protect the host pipe against corrosion and improves the flow characteristics of the host pipe. A thicker coating of polyurethane can be applied to the pipe to provide a measure of semi-structural integrity and leak protection. Polyurethane coatings inhibit corrosion by forming an impermeable barrier between the host pipe and the flow stream of the pipe.