VERFAHREN ZUR HERSTELLUNG VON VERBUNDROHREN FUER DEN TRANSPORT VERSCHIEDENER FLUESSIGKEITEN.

摘要

A method of making a tube for carrying various fluids and materials, the tube comprising from the inside to the outside a layer of impervious plastics material, a first layer of glass fibers connected to the impervious layer, a layer of electrically conducting material and a second layer of glass fibers, the three lastly named layers being impregnated with a resin polymerized through heating of the layer of electrically conducting material which may be a heating metal wire resistor.