slutstoppar

Slutstoppar, literally “end stoppers,” is a Swedish term for devices used to seal the end of a tube, pipe, or channel. They prevent leakage and ingress of contaminants and are used to terminate a run in a controlled way. They appear in many sectors, including plumbing, HVAC, automotive, and manufacturing. Materials vary: plastics (PVC, polyamide), elastomers (EPDM, nitrile), and metals (steel, brass, aluminum). The main types include end caps that slip over the end of a tube, threaded end caps, and welded or glued caps. There are also plug systems used to seal electrical conduits or pneumatic lines.

Key design considerations are inner diameter or outer diameter, wall thickness, chemical resistance, temperature and pressure ratings, and whether the cap is permanent or removable. Installation methods differ: slip-on caps rely on interference fit, threaded caps require matching threads (ISO/DIN standards), and welded or glued caps require appropriate bonding or welding. Typical applications include sealing pipe ends in plumbing, terminating tubes in hydraulic or pneumatic systems, finishing fabrications, and closing conduit ends in electrical installations. Standards and sizing follow industry norms, with fittings and caps tested for pressure compatibility where relevant.

In Swedish technical usage, slutstoppar is the standard term for end closures; it may be encountered with slang meanings in non-technical contexts, so the intended sense should be inferred from the subject matter.