Abstract: The formation of a resin layer, a metal layer and an insulating resin layer on an outer surface of a corrugated metal pipe for flowing a fluid provides a flexible pipe, whose corrugated metal pipe does not suffer from having apertures even with spark discharge by induced lightning.

Abstract: The formation of a resin layer, a metal layer and an insulating resin layer on an outer surface of a corrugated metal pipe for flowing a fluid provides a flexible pipe, whose corrugated metal pipe does not suffer from having apertures even with spark discharge by induced lightning.

Abstract: A pipe joint for connecting a flexible corrugated tube includes a joint body, a sleeve received in an axial through bore in the joint body for holding a free end of the flexible corrugated tube, and a nut threadedly fitted in a threaded portion of the joint body. A shoulder is formed on an inner surface of the through bore, and has an air-tight surface directed toward one end of the through bore. A tapering surface, decreasing in diameter progressively toward the shoulder, is formed on the inner surface of the through bore in adjacent relation to the shoulder. An annular groove of a generally channel-shaped cross-section is formed in the inner surface of the through bore in adjacent relation to the tapering surface. The sleeve has projections extending radially inwardly from one end thereof facing said shoulder, the sleeve having an end surface at the other end thereof.