Bushings, sealing devices, tubing, and methods of installing tubing

摘要

A bushing (306) for metal pipe connections is disclosed. The bushing comprises one or more circumferential ribs (see 326a & 326b; figure 3C) adapted to engage one or more corrugations of a tube (200; see also figure 3C), and one or more axially extending tongues (312a) located on a substantially opposite end of the bushing from the one or more circumferential ribs. The one or more axially extending tongues are tapered toward an end of the bushing to allow easier insertion of the one or more axially extending tongues between tube layers (see 204, 206, 208; figure 3C). The bushing is fabricated from a conductive material and the one or more axially extending tongues are adapted to form electrical continuity with the tube.