PIPE LINING METHOD

PROBLEM TO BE SOLVED: To facilitate the expansion of the diameter and deformation and to surely line even an established pipe with many joint parts by reducing the catch resistance of a cylindrical braid and a tube for forming an airtight layer against a level difference and a burr in a joint part such as an elbow. SOLUTION: In this pipe lining method that, after a cylindrical braid 2 expandable in the circumferential and longitudinal directions is drawn in an established pipe B, the inside/outside faces of a first tube 3 are inversed from the tip side in the insertion direction in order, while the first tube 3 for forming an airtight layer having a flexibility is inserted in the cylindrical braid 2, so that the diameters of the cylindrical braid 2 and the first tube 3 are enlarged and deformed by pressure fluid fed between the first tube part inserted in the cylindrical braid 2 before the inversion and the first tube part after the inversion so as to be lined. Before the cylindrical braid 2 is drawn in the established pipe B, a second resin tube 11 with its inside formed smooth is inserted into the established pipe B and then the cylindrical braid 2 is drawn in the second tube 11.