An apparatus for monitoring the condition of a hose (100) including an inner liner (104) and a carcass (106) having at least one ply (108a, 108b, 108c, 108d or 108e) disposed in surrounding relationship with the inner liner (104) and an outer cover (300) about the carcass (106). The monitoring apparatus includes an electronic hose tag (310) connected to the hose (100) for measuring the vibration of the hose. In another embodiment, the hose includes at least one sensing element (112) helically wound about the inner liner (104) and an inner sensing element monitoring circuit (404) with a microprocessor (500) connected thereto for determining whether there is a discontinuity in the inner sensing element (112) and thus a worn through area of the inner liner (104). An alarm signal can be transmitted with transmitter structure (430) to a remote receiver (654).

One or more electric and/or data transmitting cables are confined in an elongated strip-shaped body containing a hardenable resin or the like, and the body is placed against a portion of the internal surface of an underground sewage, water or other pipe. An expandible tubular liner is thereupon introduced into the pipe and is expanded to press the body against the pipe. The body is caused to set, by conveying a hot fluid through the liner and/or by electrically heating the cable or cables, and to adhere to the internal surface of the pipe. The liner can remain in the pipe and can be bonded to the strip-shaped body and/or to the remaining portion of the internal surface of the pipe. Alternatively, the liner is caused to collapse and is withdrawn from the pipe once the strip-shaped body is bonded to the internal surface of the pipe.

A detectable liquid leakage conduit characterized by a conduit fitted with a tube which is capable of preventing spillage of liquid from the conduit in the event of a leak. In one embodiment, a leak sensor interposed between the tube and the conduit is electrically connected to a leak detector, whereby leaked fluid in the tube triggers an alarm signal to the leak detector, which alerts personnel to the need for repairing or replacing the conduit.

A valve controlled fluid power actuator arrangement having a fluid power valve arrangement (61) controlled by an electronic control means (63 through 65) being connected by means of at least one plastic fluid power line (11) with at least one actuator (62). In the plastic line (61) electrical line strands and/or light guides are integrated for the transmission of sensor signals. The at least one plastic line (11) is connected with the respective actuator (62) with the aid of a connection member (10) having a connection cable (29) with at least one sensor (30) in or on the actuator (62). Accordingly in the case of a valve arrangement separate from the actuators a rapid and simple fluid power and electrical or, respectively, optical assembly may take place.

A method of lining a bore section, the method comprises providing a first tubing section and an expandable thin-walled second tubing section. The first tubing section is run into a section of a bore. The second tubing section is then run into the bore section, within the first tubing section, and expanded to a larger diameter, such that the bore section is lined by at least two tubing sections.