Xinxiang Songjin Machinery Co., Ltd. specializes in the production of threaded tube machines for boiler plants, chemical plants, container plants, and heat exchange plants.

Benefits of using threaded tubes in heat exchange equipment:

(1) Simultaneous enhancement of heat transfer inside and outside the tube;

(2) Fast processing speed, excellent results, and low cost;

(3) Wide applicability: enhances heat transfer for evaporation, condensation, gaseous flow heat transfer, and liquid flow heat transfer both inside and outside the tube;

(4) Self-adjusting capability with thermal expansion and contraction;

(5) Scale is less likely to form.

I. Product Introduction:

Since Luwsun et al. from the United States published the first academic report on threaded tubes in 1966, threaded tubes have attracted significant attention as high-efficiency heat exchange components. They are now increasingly widely used in China. Threaded tubes are spiral heat-conducting tubes with internal protrusions and external indentations. The equipment uses cold rolling to process ordinary smooth tubes into threaded tubes. They are suitable for heat exchange tubes in equipment such as boilers, condensers, low-pressure heaters, oil coolers, and air coolers.

II. Advantages:

1. Application in boilers: After optimization for heat exchange and flow resistance, the heat transfer capacity of one threaded tube is equivalent to 1.7-1.8 ordinary steel tubes of the same size. This not only significantly reduces the number of steel tubes required but also allows for a smaller boiler shell diameter. As a result, steel consumption for pressure components is noticeably reduced, saving materials and lowering costs.

2. Application in the air conditioning and refrigeration industry: Compared to ordinary smooth tubes, threaded tubes provide 1.5-2.0 times the heat transfer surface area, greatly improving the flow pattern of refrigerants and enhancing the boiling and condensation heat transfer effects inside the tube. The refrigerant is propelled in a spiral manner through the internal threads, reducing pressure loss by over 50%. Manufacturing processes such as tube expansion and welding are the same as for ordinary tubes. This enables air conditioners to be smaller and lighter, saving approximately one-third of the tube weight compared to smooth tubes. It also reduces electricity consumption during operation and lowers costs.

3. Application in heat exchange equipment: Steel or stainless steel tubes are formed in one pass through machine rolling. Scale on the surface of threaded tubes forms in a spiral pattern. Temperature changes during equipment operation cause the tubes to expand and contract, enabling the scale layer to self-detach. In contrast, scale on smooth tubes forms a cylindrical layer with no self-detaching capability. Threaded tubes are now widely used in power plant condensers and boiler auxiliary heat exchange systems, making them an ideal replacement for smooth tubes and copper tubes.

Benefits of using threaded tubes in heat exchange equipment:

(1) Simultaneous enhancement of heat transfer inside and outside the tube;

(2) Fast processing speed, excellent results, and low cost;

(3) Wide applicability: enhances heat transfer for evaporation, condensation, gaseous flow heat transfer, and liquid flow heat transfer both inside and outside the tube;

(4) Self-adjusting capability with thermal expansion and contraction;

(5) Scale is less likely to form.

Forming Process:

After cold rolling, steel tubes experience a dimensional shrinkage of 0.1% to 0.5%. Factors affecting the shrinkage length include: 1. Thread depth (e); 2. Pitch (s); 3. Thread radius (r); these can be adjusted as needed.

Processing diameter: ∮6mm-89mm, processing thickness: 0.5mm-5mm, adjustable spiral direction, adjustable pitch, adjustable thread depth.