A perfected pipe that contains cement, not tensioned, reinforced, rigid, substantially non-flexible. (Machine-translation by Google Translate, not legally binding)

摘要

An improved cement-containing, unstressed, reinforced, rigid, substantially non-flexible, cement tube comprising a substantially inflexible rigid tube composed of a tubular article body of a composition comprising a hydraulic cement, characterized by a plurality of continuous filament windings of an aromatic polyamide fiber of high tensile strength and with a low elongation capacity around at least one layer of the cement-containing composition inside the tube without the filament being stretched, and the continuous filament of the windings does not it is substantially under tension and has its normal length, and elements that maintain the windings of the continuous filament around one or more of the cement-containing layers within the interior of the tube and without the filament being stretched and without being substantially under tension. (Machine-translation by Google Translate, not legally binding)