Stiffener for corrugated pipe wall, assembly for connecting a branch to a plastic pipe, and method of handling a plastic pipe

摘要

A stiffener (8) for being inserted into a hollow corrugation (7) exposed about an opening (5) formed within a corrugated wall of a plastic pipe (1), wherein the hollow corrugation (7) is formed between an inner layer (3) and an outer layer (4) of the corrugated wall of the plastic pipe (1).