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AssigneeSimona AG
InventorsJurgen Allmann, Edwin Baumann, Richard Spengler
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The invention relates to a method for the production of a pipe section (2), for insertion in a damaged pipeline or channel after the relining process, comprising an essentially cylindrical pipe section (4), with a collar end-piece (10) and an end (16), which may be introduced in the collar end-piece of an adjacent, corresponding pipe section. The invention is characterised in that the essentially cylindrical pipe section (4) is produced by winding a flat material (32) around a core (34) and formed by seam- or butt-welding or similar, or for a non-circular tube profile produced by means of shaping and, optionally, subsequent sectioning. The collar end-piece (10) is produced by partial sliding of a suitable pre-formed separate collar ring (8) onto one end (6) of the essentially cylindrical pipe section (4) and subsequent fixing to the above by means of fillet or socket welding.
Method for the production of a pipe section (2) for insertion in a damaged pipeline or channel after the relining process that has an essentially cylindrical pipe segment (4) with a collar end-piece (10) and an end (16), which may be introduced into the collar end-piece of an adjoining, corresponding pipe section, characterized in that the essentially cylindrical pipe segment (4) is produced by winding a flat material (32) around a core (34) and formed by seam or butt welding or similar, or for a non-circular pipe profile, is produced from a circular profile by means of forming, and, optionally, subsequent cutting to length, and in that the collar end-piece (10) is produced by pushing a suitable, separately produced collar ring (8) partway onto an end (6) of the essentially cylindrical pipe segment (4) and subsequently affixing it thereto by means of fillet or socket welding.
Method in accordance with one of the preceding claims, characterized in that, inside the collar end-piece (10) or outside the free end (16) of the cylindrical pipe segment (4), a circumferential groove (20) is produced into which is placed a ring-shaped lip seal (22) of an elastomeric material.
Method in accordance with one of the preceding claims, characterized in that a heating spiral for electric socket welding is placed in the inner wall of the collar end-piece (10) or the outer wall of the free end (16) of the cylindrical pipe segment (4).
Method in accordance with one of the preceding claims, characterized in that the essentially cylindrical pipe segment (4) is provided on its outside with projections (26, 58), whose height preferably corresponds to the wall thickness of the collar ring (8).
Method in accordance with one of the preceding claims, characterized in that the relevant pipe section (2), with the exception of a possible lip seal (22), heating spiral (14), or the like, is made entirely of thermoplastic material, preferably polyethylene, particularly the types designated PE 80 or PE 100 per DIN 8074/8075, or polypropylene, particularly the types designated PP-H 100, PP-B 80 or PP-R 80 per DIN 8077/8078, or polyvinylidene fluoride (PVDF), or of a multilayer composite of such plastics.
Method in accordance with one of the preceding claims, characterized in that the at least one external longitudinal groove (28) is placed in the collar ring (8) before or after application to the essentially cylindrical pipe segment (4).
Method in accordance with one of the preceding claims, characterized in that bores (30) normal to the wall are made in the collar end-piece (10) to accommodate screws in order to affix the collar end-piece to the end (16) of an adjacent pipe section (2) that is to be introduced therein.
Dependencies are inferred from the claim text.