Tetningsmedium

Tetningsmedium is a material used to seal joints and interfaces to prevent leakage of liquids or gases. It covers a range of products including gaskets, sealants, tapes, and packing used in static and dynamic sealing applications in plumbing, automotive, and industrial equipment. Tetningsmediums can be solid, semi-solid, or liquid and are selected according to the media being sealed, operating temperature and pressure, and the degree of movement between connected parts.

Common forms and materials include gaskets (sheet materials, spiral wound, or ring-type), elastomeric seals (NBR, Viton, silicone), sealants (silicone, polysulfide, polyurethane, anaerobic adhesives), PTFE tapes, putties, and pastes. Selection also depends on chemical compatibility with the sealed medium, temperature range, pressure rating, compressibility, and resistance to aging, vibration, and creep.

Key considerations for use include proper surface preparation (clean, dry, and suitably roughened if required), correct application method, and achieving the intended compression or bond line thickness. Installation practices may involve tightening sequences and torque specifications for flanged connections, or curing times for sealants and anaerobic products.

Safety and standards are important, as some sealants and packing materials contain solvents or emit vapors during curing. Handling should follow manufacturer instructions and local regulations. Sealing materials and practices are governed by national and international standards and guidelines (for example, DIN, ISO, ASME), which cover material tests, compatibility, and performance requirements.