1.1 ,This specification covers requirements and test methods for materials, workmanship, dimensions, perforations, pipe stiffness, elongation, joint separation resistance, quality of extruded polyethylene, brittleness, bond, and marking of corrugated polyethylene (PE) pipe and fittings. It covers nominal sizes 3 in. [76 mm], 4 in. [102 mm], 5 in. [127 mm] 6 in. [152 mm], 8 in. [203 mm], 10 in. [254 mm], 12 in. [305 mm], 15 in. [381 mm], 18 in. [457 mm], and 24 in. [610 mm].