The subject of the invention is thermal insulation for pipelines protecting them from loss of heat or cold when carrying heating, cooling, and other industrial and utility media characterised in that it has: a first insulation layer (2) made of aluminium foil or metallized foil with thickness g = 0.04 mm and resistant to infrared radiation (IR), connected detachably or permanently with spacing pins (3), lower ends of which adhere to outer surface of the insulated pipeline's steel pipe (1) forming this way an air gap (4) between thermal insulation and the pipe, or the first insulation layer (2) adheres directly to outer surface of a structure (11) comprising spacing battens (11') interconnected with each other by means of annular elements (12), said structure being mounted of outer surface of said steel tube (1) also forming this way an air gap (4) between the pipe and said first insulation layer; the second insulation layer (6) adjacent to the first insulation layer (2) comprising a pack of several layers of insulating plastic film bubble wrap adhering loosely to each other or glued together by means of adhesive (5) resistant to high temperatures, with bubbles of cellular structure of the wrap filled with a mixture of air and argon and bubble cells (6') pointing towards the insulated steel pipe (1); and an outer layer (7) surrounding and adhering to the second insulation layer (6), said outer layer being made of a plastic resistant to operation of ultraviolet (UV) radiation and variable climatic conditions with ends connected to each other by means of the scarf joint and topped additionally by means of tape (8) attached to its upper surface.