Protective caps for threaded pipe ends

摘要

To form protective covering caps for the threaded ends of pipes or sleeves, especially oilfield piping, a molten mixture of plastics and fibres is used and shear forces are developed before and/or during setting by flow movements of material vols., generally parallel to at least one wall of the moulded covering cap. The reinforcement fibres in the plastics are of glass or carbon, and the like.