metallrör

Metallrør is a term used in Norwegian and Swedish to describe metal tubes used as piping for the conveyance of liquids and gases in residential, commercial, and industrial systems. They are produced in a range of alloys and forms, including steel, stainless steel, copper, aluminum, brass and other metals, and can be supplied as seamless or welded tubes.

Materials and forms vary to suit different applications. Steel and stainless steel tubes offer high strength and corrosion resistance, while copper and brass tubes are common in plumbing and heating for their workability and thermal properties. Tubes may be seamless, produced by piercing and drawing, or welded, produced by rolling and seam welding. Surface finishes may include galvanization, electro-polishing, or protective coatings to improve durability and corrosion resistance.

Standards and specifications govern Metallrør in most markets. Common reference points include ISO, EN, and ASTM standards, which cover dimensions, tolerances, wall thickness, mechanical properties, and test methods. Diameters, wall thickness, and length vary widely, with pressure ratings and temperature limits determined by material grade and wall thickness. Quality control typically involves nondestructive testing and hydrostatic testing to verify integrity.

Applications and installation require matching material properties to service conditions. Metallrør are used in water supply, gas distribution, heating and cooling systems, chemical processing, and industrial pipelines. Joining methods include welding, brazing or soldering, and threaded or flanged connections. Corrosion resistance, chemical compatibility, temperature and pressure requirements, and local codes guide material selection, fabrication, and installation. Regular inspection and maintenance help ensure long-term performance and safety.