Method of making protective caps for threaded pipe ends or pipe sockets and protective cap made by said method

摘要

Method of making a thermoplastic protective cap having a cylindrical wall from a thermoplstic profile comprising the following steps: heating the thermoplastic profile; winding the thermoplastic plastic profile in helically overlapping form onto a mandrel to obtain a wall thickness of between ten and ninety percent of total cap wall thickness; winding a thermoplastic plastic profile containing reinforcing material in helically overlapping form onto a mandrel containing said thermoplastic plastic profile to obtain the remainder of the cap wall thickness.