Screwing element and pipe connection device for attaching pipes

摘要

The element e.g. screwing fitting (1), has thread-free contact surfaces (4, 5) provided in sections with a coating (8) having a friction value, and a thread (3) provided in sections with a coating (7) having a friction value that is significantly larger than the friction value. The thread is designed as an external thread and an internal thread. The contact surfaces are provided at a lower side of a screwing head (6) at a thread side. The friction value of the thread coating amounts to 0.25 to 0.4, where the friction value of the contact surfaces coating amounts to 0.03 to 0.1. An independent claim is also included for a pipe connecting device with a screwing element.