Characteristics of titanium tube
1. Wall thickness of titanium tube
The wall thickness of the heat transfer pipe is determined by the service conditions, the material of the tube sheet, the construction ability of the pipe expansion operation, and the welding technology of the pipe end. Due to the small diameter of the heat transfer pipe, the strength requirement is not high, so the pipe with thinner wall thickness is used in actual use. Generally, the wall thickness of the copper alloy pipe is 0.9mm-1.2mm; Titanium tube can be used instead. In places with low corrosivity, thin-walled welded pipe with a wall thickness of 0.3 mm can be used.
2. Thermal conductivity of titanium tube
Due to the different materials of the heat transfer pipe, the thermal conductivity is also different. For example, titanium is 17W/(m · k), aluminum brass is lOOW/(m · k), and 70/30 white copper is 29W/(m · k). Therefore, the heat transfer effect of the heat transfer pipe can be controlled by the change of wall thickness. Among the above materials, titanium has the lowest thermal conductivity. If thin-walled titanium welded pipe is used, its thermal conductivity is worse than that of aluminum brass, but it is equivalent to 90/10 white copper and better than that of 70/30 white copper.
3. Economy of titanium tube
The unit mass price of titanium tube is 2-6 times more expensive than that of copper alloy tube. However, considering the cost performance ratio, the price of titanium tube can compete with that of copper alloy tube. Because of the low density of titanium and the same wall thickness, the quality of titanium tube with the same length is only 50% of that of copper alloy tube. When the wall thickness of titanium tube is 50% of that of copper alloy tube, the quality of titanium tube with the same heat transfer area is only 1/4 of that of copper alloy tube. According to the current price level, The overall price of thin-walled titanium welded pipe is the same as that of aluminum copper pipe, which is cheaper than white copper pipe. It can be seen that titanium tube is competitive in price.
