Abstract: A method for manufacturing of ceramic electro-insulating pipes having an external diameter between 30 mm and 100 mm, a wall thickness between 5 mm and 10 mm, a length between 15 cm and 150 cm, the method comprising molding in a mold, an element made from a ceramic powder, compacting the ceramic element in a press, glazing, firing of a glazed element in a furnace and shaping the fired element in order to produce the ceramic insulating pipe characterized in that the element is molded in a mould (102) from a ceramic powder consisting of Al2O3 from 40% to 75% by weight, SiO2 from 5 to 25%, kaolin (white clay) from 5% to 20%, and potter's clay from 5% to 20%, wherein the mold (102) comprises a rigid cylindrical lower punch (202) and a flexible cylindrical outer membrane (203) placed around the lower punch (202) so that between them a cylindrical gap (204) is formed to be filled with the ceramic powder, wherein while filling the gap (204) with the ceramic powder, the outer membrane (203) is deformed from a circular