| 摘要 |
The present invention relates to a seamed pipe which has improved elasticity against the external force of a longitudinal direction by forming a bellows in a circular shape. The seamless pipe with improved elasticity according to the present invention comprises: a left flange (100) and a right flange (110) which are formed to be separated from each other on left and right sides; a bellows (200) which is installed between the left flange (100) and the right flange (110) and is able to change a length between the left flange (100) and the right flange (110); a left setting log (120) and a right setting log (130) which are formed to protrude from the left flange (100) and the right flange (110) to the outside; and a setting bolt (300) and a setting nut (400) which are included between the left setting log (120) and the right setting log (130) and support the left setting log (120) and the right setting log (130) to be separated at a predetermined interval. The bellows (200) has a crease shape in which protrusions (210) protruding outwards and grooves (220) dent inwards are formed repeatedly. The protrusions (210) and the grooves (220) have mutually symmetrical shapes and have a cross section of a circular shape having an open end. By the above composition, the present invention is able to improve elasticity. |
