Abstract: In connection with installations comprising articles housing or conducting corroding material, or in connection with substantially pipe- or hose-shaped articles which are to be protected against fire, for example a propulsion motor in a vehicle, it is in accordance with the present invention suggested, rather than using steel pipes and/or steel containers, to use plastic articles which by nature is corrosion resistant. Plastic articles which preferably are pipeshaped (1) are insulated by means of a combination of a light thermally insulating material (2) which normally cannot stand exposure to fire (approximately 800.degree. C. and higher), and a fire resistant material (3) which is provided around said insulating material (2), and which at high temperature (approximately 800.degree. C. and higher) renders a ceramic stable fire protecting phase.

Abstract: Gas tight and water tight cable transits comprise a pair of elements of a rigid material each having a narrow layer of resilient sealing material molded integrally therewith which upon clamping of the elements together in a frame expands radially for sealing against the cable and abutting elements and frame parts. In another embodiment, the narrow portion of resilient material is secured to one end of a cable transit element a pair of elements being assembled end-to-end and clamped together to define a seal intermediate the elements.