Thermal insulating tubes made of polyethylene foam are used for insulation of pipe lines with hot and cold water, central heating and sanitary systems. The tube can be also used as protection of painted tube profiles or profiles with a noble surface. Excellent mechanical, acoustic and thermal insulation. The material is flexible and easy to shape, can be easily divided and adjust to the required dimension. Among advantages belong chemical resistance, non-absorbability,environmental harmlessness and possibility of easy recycling.