Specifies requirements for full circular shape corrugated steel pipes manufactured from galvanized steel strip. The pipe is formed by a continuous helical lock-seam, and only pipes in which the direction of the corrugations run helically to the longitudinal axis of the pipe are covered. Requirements for base metal, lock-seam strength, coupling bands, perforations, protective coating and workmanship are specified. Identical to AS 1761:1985 with modifications for New Zealand.