Pipe relining allows the rehabilitation of existing sewer or drain pipes without digging up the entire length of the pipe and replacing it. Pipe relining uses a felt material soaked in an epoxy or vinyl ester resin and is inflated with air and inserted into the existing pipe until the resin hardens. #civilengineering #theconstructor #construction #civil #engineering #civilengineeringworld #civilengineer #engineer #engineers #building #civilconstruction #constructionlife #engineeringlife #constru