Pipes and Fittings

A pipe fitting comprises a fitting body with a longitudinal axis, having a pipe connection member for the sealed connection of a pipe and a thread for threadedly joining the fitting body to a connection unit, and a member on the fitting body to be driven by a tool, to which a tool for turning the fitting body about its longitudinal axis may be applied for threadedly joining the same to the connection unit. This fitting is provided with means between the tool engaging portion and the fitting body that limit the torque acting on the fitting body when the tool engaging portion is turned.

Wherein the torque limiting means is an annular rated breaking zone that extends concentrically to the longitudinal axis of the fitting body and comprises a plurality of passages or recesses extending in parallel to the longitudinal axis, or at least a recess extending concentrically at least in portions and being open in the direction of the longitudinal axis, and two groups of such recesses with their open sides facing away from each other.