Copper coated steel tubedouble layer welded tube copper coated steel tube. Single layer welded tube has copper coating only on outside surface, and double layer welded copper tube has copper coating on both inside and outside surfaces.
Copper coated steel tube 6 x 0.6 (mm) is typical for fire-fighting systems.
tube in carbon steel, both sides coated with copper, carbon steel pipe both sides coated with copper, Copper coated steel tube for fire-fighting system
