1. They have different meanings

      Galvanized steel pipe, welded steel pipe with hot-dip galvanized or electro-galvanized layer on the surface.

      Stainless steel pipe is a hollow long round steel.

      2. The scope of application is different

      Hot-dip galvanized steel pipes are widely used in construction, machinery, coal mines, chemicals, electric power, railway vehicles, automobile industry, highways, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, prospecting machinery and other manufacturing industries.

      Stainless steel pipes are widely used in industrial transportation pipelines and mechanical structural parts such as petroleum, chemical, medical, food, light industry, mechanical instruments, etc. In addition, when the bending and torsion strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also often used as furniture and kitchen utensils.

      3. Different production methods

      The manufacturing method of the black pipe (furnace welding or electric welding) is selected by the manufacturer. Hot-dip galvanizing is used for galvanizing.

      Stainless steel pipe: raw material-slitting-welding pipe-trimming-polishing-inspection (jet printing)-packaging-shipping (warehouse)-(decorative welded pipe).

      Raw material-slitting-welding pipe-heat treatment-straightening-straightening-trimming-pickling-water pressure test-inspection (printing)-packaging-shipping (warehouse) (pipes for industrial piping of welded pipes).