Tubería de Cerramiento Negra y Tubería de Cerramiento Galvanizada

The as-welded bare steel mechanical tubes is a Black steel sheet, which is formed into square, rectangular or circular sections, closed by a high-strength continuous welding process 

The as-welded galvanized steel mechanical tubes is a Steel sheet with a galvanized metallic coating, which is formed into square, rectangular or circular sections, closed by means of a high-resistance continuous welding process. The weld bead is coated with zinc to generate uniform protection over the entire surface of the tube.