No1, Gas Cylinder pipe and Accumulator pipe

  No2, Precision tubes and Piston Rod for Hydraulic cylinders

  No3, Drill pipes

  No4, OCTG  pipes related with API standards

  No5, Seamless Line Pipe

  No6, Tubes for mechanical and structure purpose

  No7, High pressure boiler tube and other alloy tube for pressure purpose

  No8, Fluid transmission pipe and lower & middle pressure boiler tube

  No9, Ship-building pipes

  No10, ERW Pipe

  No11, Others