Abstract: The invention relates to a tube (01) or semi-finished tube, in particular for chemical apparatus construction, for storing or for transporting aggressive storage media, comprising a solid inner tube (02) with the inner side (05) of which the storage medium can come into contact and which is made of a thermoplastic that is chemically resistant to the storage medium, and comprising an adhesion-promoting layer (03) applied to the outer side (09) of the inner tube (02), which has a textile structure and is made of a thermoplastic, the textile structure of the adhesion-promoting layer (03) being suitable for mounting a support tube (04) on the outer side of the adhesion-promoting layer (03), the outer side of the inner tube (02) and the inner side of the adhesion-promoting layer (03) being welded together in a material-bonded manner, the textile structure being preserved on the outer side of the adhesion-promoting layer (03).

Abstract: The invention relates to a tube (01) or semi-finished tube, in particular for chemical apparatus construction, for storing or for transporting aggressive storage media, comprising a solid inner tube (02) with the inner side (05) of which the storage medium can come into contact and which is made of a thermoplastic that is chemically resistant to the storage medium, and comprising an adhesion-promoting layer (03) applied to the outer side (09) of the inner tube (02), which has a textile structure and is made of a thermoplastic, the textile structure of the adhesion-promoting layer (03) being suitable for mounting a support tube (04) on the outer side of the adhesion-promoting layer (03), the outer side of the inner tube (02) and the inner side of the adhesion-promoting layer (03) being welded together in a material-bonded manner, the textile structure being preserved on the outer side of the adhesion-promoting layer (03).

Abstract: The invention relates to a container, tube or chemical apparatus, in particular for the construction of chemical apparatus for storing or for transporting aggressive storage media, comprising a solid inner layer with the inner side of which the storage medium can come into contact and which is made of a thermoplastic that is resistant to the storage medium, comprising an adhesion-promoting layer applied to the outer side of the inner layer, which is made of a textile sheet-like structure, and comprising a carrier layer applied to the outer side of the adhesion-promoting layer for providing mechanical support to the layer structure, wherein between the inner layer and the outer layer an indicator layer is provided, the material of the indicator layer being discolored by components of the storage medium which permeate through the inner layer.

Abstract: 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.

Abstract: A fluid conduit containment system includes an inner carrier conduit of a first type of resinous thermoplastic material having a first heat weldable annular end face and an outer safety containment conduit formed of a second type of heat weldable, resinous thermoplastic material aligned coaxially in outwardly surrounding, radially spaced apart relation with the inner conduit for containing any fluid leakage therefrom. The second conduit has a second heat weldable annular end face in concentric coplanar relation with the first heat weldable end face and an anchor-spacer extends between the inner and outer conduits for maintaining the conduits in permanently spaced apart relation. The anchor-spacer includes a pair of coaxially aligned spacer rings or halves joining a circumferential outside surface on the inner carrier conduit and extending radially outwardly thereof to engage a circumferential inside surface on the outer containment conduit.