Electric earthing lead esp for pipelines in chemical installations

摘要

The earth conductor has a metallic insert (6) of a seal (5) clamped in a flange connection of a tube conduit (1), with an insulating cladding (7). To connect the flange (2,13) several clamp screws drawn through bores (15) in the flange (13) are provided. The metallic insert (6) has an earth tongue (9) extending between the flanges (2) of the connection to convey away ab electric charge. The tongue (9) extends around the periphery (20) of the respective flange (13) and extends from this to the opposite reverse side via the seat of the respective clamp screw (16). The tongue (9) has at least two holes (10,11). At least one of these is a centring hole (10) through which the clamp screw passes to the front side of the flange. The other is an earthing hole (11) through which the clamp screw (16) passes through to the reverse side of the flange.