The integral finned tube is rolled from the thick wall seamless tube after heating. The finned tube and the base tube are the same metal body without defects such as desoldering and low tightness. Because the finned tube and base tube is the same metal body with low thermal resistance, the heat transfer efficiency is improved. The integrated finned tube has obtained the national patent, and the special equipment "hot rolling steel based finned tube processing machine tool" is used for the production of integrated finned tube. The heat transfer ratio of a "hot rolled steel-based finned tube" to its equal diameter smooth tube can reach 2.67~3.46 times through the experiment of the heat flow center of the School of Energy and Power Engineering of Xian Jiaotong University.

The integrated finned tube has a strong anti-fly ash scour effect, and has high heat exchange capacity and environmental durability. It is an ideal replacement element for heat exchange elements in coal-fired boilers in thermal power plants.

Item        OD (mm)        WT (mm)         Height (mm)     Heat Transfer Area（㎡/m）

   1              30                    1.5                 6                          0.287

   2            32                    1.5                 7                          0.308

   3            32                      2                         8                          0.324

   4            34                      2                        10                          0.407

   5            34                      3                         8                          0.392

   6            36                      3                        10                          0.432

   7            36                    3.5                 8                          0.418

   8            36                      4                        10                          0.437

   9            38                      3                         8                          0.484

  10            38                    3.5                10                          0.574

  11            38                      4                        10                          0.574

  12            42                    3.5                 8                          0.566

  13            42                      4                        10                          0.586

  14            42                    4.5                10                          0.586

  15            48                    3.5                 8                          0.628

  16            48                      4                        10                          0.657

  17            48                    4.5                12                          0.677

  18            51                      4                        10                          0.685

The Integral spiral finned tube is rolled from the thick wall seamless tube after heating. The finned tube and the header tube are the same metal body without defects such as desoldering and low tightness. Because the finned tube and header tube is the same metal body with low thermal resistance, the heat transfer efficiency is improved. The integrated finned tube has obtained the national patent, and the special equipment "hot rolling steel based finned tube processing machine tool" is used for the production of integrated finned tube. The heat transfer ratio of a "hot rolled steel-based finned tube" to its equal diameter smooth tube can reach 2.67~3.46 times through the experiment of the heat flow center of the School of Energy and Power Engineering of Xian Jiaotong University.

The Integral spiral finned tube has a strong anti-fly ash scour effect, and has high heat exchange capacity and environmental durability. It is an ideal replacement element for heat exchange elements in coal-fired boilers in thermal power plants.