The issue of the length of heat exchange tubes in U-tube heat exchangers
Thread Content
As the title suggests, the standards specify that the length of the heat exchange tubes in U-tube heat exchangers is only 3m and 6m. I wonder if there are any other values for the length of these heat exchange tubes in actual engineering applications? If so, what is the commonly used length? Thank you!
The actual length of a U-tube refers to the length of the straight sections; I think there must be other specifications as well, but I don’t have any practical experience in this area. Let’s talk downstairs about whether it’s available or not
Standards only provide a general guideline; the specifics are determined by the design. Many of the regulations outlined in standards serve merely as a reference for the design process
I think that if, based on the standard selection, no suitable model is available, it’s also possible to determine the length of the heat exchange tubes by oneself. However, try to choose the standard model, as in most cases the tube bundle tends to get damaged, and in that case a new tube bundle can be ordered based on the standard model.
There can be other sizes; what the original poster mentioned is the standard type. There are also often non-standard versions. The length of the U-tube is directly related to the amount of smoke and the flow rate of the smoke gas.
U-shaped heat exchange tubes are available in various lengths; however, the ordering specifications vary depending on the length. But these days, tubes are purchased in fixed lengths, so there’s no need to worry about length – all that matters is choosing a suitable design for the manufacturing process. I have considerable practical experience in this area.
The length of U-shaped heat exchange tubes does not include the bent sections; similar to other types, common lengths are 1.5m, 3m, 4.5m, 6m, 7.5m, 9m, 12m, etc... Other lengths can also be chosen as needed.
Yes, there is no specific requirement regarding the length of U-tubes; aside from the curved part, the straight sections can be as long as 10 meters, 11 meters, 12 meters, 13 meters, or even 20 meters. Our factory has produced many U-shaped heat exchange tubes of such lengths, most of which are exported to Southeast Asia, Europe, Malaysia, South Korea, Japan, and other places. In addition to materials like 304, 304L, 316, 316L, and 321, there are also many tubes made of martensitic and ferritic materials, such as TP410, TP420, TP430, and TP405.
What was said on the 6th floor is correct – nowadays, heat exchange tubes can be ordered in custom lengths, but you also need to take into account your processing time, as steel tube manufacturers also have a production cycle for such tubes; it usually takes around 10 days to half a month, but in some cases it may take up to a month.
The length of the heat exchange tubes in standard U-tube heat exchangers is generally 3 meters or 6 meters. Please note that these are standard lengths; non-standard versions may not necessarily have these dimensions. Furthermore, if there are many heat exchangers in the device and they are generally located in the same area, for aesthetic reasons and to maintain consistency, it is advisable to use similar saddle spacing.
The length of the heat exchange tubes is determined by the design; any length is possible. Standards specify only 3m and 6m, as these are the most commonly used specifications. A company can establish its own standards based on the volume and scale of production, in order to determine the appropriate specifications and parameters.
When actually purchasing heat exchange tubes, it is possible to order tubes of fixed length, generally not exceeding 12 meters; if purchasing from a material market, qualified tubes of variable length can also be used
Other specifications are available; the length of the U-tube can be ordered according to actual needs:victory: