1. Structural Seamless Steel Tube (GB/T8162-1999) is used for general structural and mechanical structure seamless steel tube.

2. Seamless steel tubes for fluid transportation (GB/T8163-1999) is used for conveying water, oil, gas and other fluids generally seamless.

3. Low and medium pressure boiler seamless pipe (GB3087-1999) is used in the manufacture of various structural low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam locomotive boiler tubes, opium pipe, small pipe and brick arch useful high-quality carbon structural steel hot-rolled and cold drawn (rolled) seamless.