Specifications include, but are not limited to: • The liner pipe shall be made of high density polyethylene resins in accordance with the requirements of ASTM D3350. The Cell Classification shall be a minimum of 345464C and shall have the Plastic Pipe Institute designation of PE3608. The supplier shall furnish a manufacturer’s certification stating that the material in the pipe meets these requirements and the dimension requirements of ASTM F714. • Pipe liner shall be a Dimension Ratio (DR) of 32.5. • The pipe shall have a smooth, non-corrugated interior and exterior surface. • The liner shall be capable of being joined into a continuous length by an interlocking method. • The joints shall not create an increase in the outside diameter of the liner pipe to eliminate any coupling difficulties.