Applications of titanium welded tubes in the heat exchange industry
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More than a decade ago, titanium welded tube heat exchange tubes were not easily accepted in China; nowadays, their use is increasing, and the industries in which they are applied are also expanding. In fact, titanium welded tubes have better mechanical properties as well as dimensions and shapes, making them more suitable for use as heat exchange tubes and nominal pipes. Can you accept titanium welded tube heat exchange tubes?
Isn’t the thermal conductivity of titanium quite poor?
Titanium is chosen for heat exchange equipment primarily due to its corrosion resistance. Due to the late development of technology in China for titanium welded pipes, titanium seamless pipes were widely used in previous years. In recent years, titanium welded pipes are increasingly being used at higher temperatures, and have gained widespread recognition. Here I have a comparison between titanium welded tubes and titanium seamless tubes.
As long as the quality of the welded pipe is guaranteed, I’m okay with it. What’s the price difference between welded pipes and seamless pipes?
It seems that welding and processing are rather troublesome. Price is a major factor
Welding titanium pipes involves certain technical complexities (compared to CS and SS), which results in higher costs for implementation. The titanium material itself is, of course, more expensive as well. As for heat transfer efficiency… it isn’t that important. The key consideration is the corrosion resistance of the equipment. Additionally, when designing heat exchangers, margin considerations are taken into account; therefore, in practice, the temperatures of the relevant inlet and outlet pipelines remain within the expected range.
Pure titanium has a value of 16 W/m²·K, while titanium alloys have only 8 W/m²·K – which is worse than that of stainless steel. Additionally, according to the available data, titanium tubes possess strong resistance to chloride ions, but their resistance to corrosion by dilute sulfuric acid is inferior to that of 2205; it may even be lower than that of 316L
There is no such thing as good or bad materials; the best one is simply the one that is most suitable, or the one with the best cost-performance ratio. .
In fact, many people have misconceptions about welded pipes; for our titanium welded pipes, 100% flaw detection and hydrostatic testing are carried out, something that isn’t possible for some seamless pipes. Moreover, the standards applied are all GB/T3625. On the other hand, the wall thickness tolerance of welded pipes is uniform.