1.1 This specification covers requirements and test methods for annular, corrugated profile wall polyethylene pipe and fittings with an interior liner. The nominal inside diameters covered are 12 to 60 in. [300 to 1500 mm]. This specification covers requirements and test methods for annular, corrugated profile wall polyethylene pipe and fittings with an interior liner. The pipe and blow-molded fittings shall be made of virgin PE plastic compound having a cell classificati