| 摘要 |
The invention relates to a spirally wound pipe and to a method and arrangement for producing it. The method according to the invention is characterized by the following steps: a flexible, elongate profile (2) is fed through an extrusion station (20) in which the profile is coated with an outer layer (3) of a weldable thermoplastic material along its entire periphery (4); after which the profile (2) is wound in spiral turns (5, 6) to form a pipe (1) about a rotating drum (30) while the said outer layer (3) from the extrusion station maintains such a temperature that the thermoplastic material is weldable, with the profile (2) in the last-wound spiral turn (5) being welded to the profile (2) in the next spiral turn (6) in such a way that a weld seam (7) is formed along the whole of the adjoining edge surfaces (8) of the profiles (2). |
