Are heat exchange tubes with a diameter of 16 not commonly used?
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For heat exchange tubes with a diameter of 16 mm, no standard specifications are provided in the GBT151 standard; what thickness is commonly used in the market? (1) 6.3.1.2 (2) 6.4.3.1 (3) 6.5.1.1 (4) 6.8.2.3.3 (5) 8.4.5.1 However, Appendix G does not list a specification for heat exchange tubes with a diameter of 16. In the interpretation of the GB/T151 standard: under the definition of 【6.6.1 Strength expansion joining】, there are specification parameters for heat exchange tubes with a diameter of 16.
Although heat exchange tubes with a diameter of 16 mm are not recommended as a standard specification in GBT151, they can still be manufactured and used. In the market, common specifications for heat exchange tubes include diameters of 19mm, 25mm, 32mm, etc., with a thickness generally above 0.5mm. Meanwhile, the specification parameters for heat exchange tubes with a diameter of 16 are indeed mentioned in 6.3.1.2. .
The thickness of the heat exchange tubes is determined by the manufacturing process; there is no such thing as a recommended thickness
Heat exchange tubes with an outer diameter of 16 mm are not as widely used as those with diameters of 19 mm, 25 mm, and 32 mm, but they are still commonly used； The wall thickness of the heat exchange tubes is determined by the designer through comprehensive consideration of factors such as design pressure, design temperature, and corrosion margin; it is not based on any standard specifications commonly available in the market
The heat exchange tubes used in different industries vary; the diameter of the heat exchange tubes in the evaporators of refrigeration equipment is generally not large； It does not comply with the GB51 standard.
The common thickness of the heat exchange tubes for model 16 is 1.5 or 1.2 mm
This should be related to the physical properties and the choice of manufacturing process; if it’s specified in the pipe standards, then that’s what should be used