Heating furnace tube material
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What are the typical materials used for the furnace tubes in heating furnaces, and what is the maximum operating temperature for them? Our facility is a continuous reforming unit that includes a four-in-one heating furnace as well as three cylindrical furnaces. What are the differences between the furnace tubes used in the hydrogen-handling system’s heating furnaces and those used in the distillation system’s heating furnaces?
GB 3087-2008 Seamless steel tubes for low and medium pressure boilers GB 5310-2008 Seamless steel tubes for high pressure boilers
The material of the heating furnace tubes is selected based on the temperature in the furnace chamber. The radiation chamber of the reformation four-in-one heating furnace uses Cr9Mo ； The pre-hydrogenation reactor uses Cr5Mo ； The disproportionation furnace uses Tp321 ； Heterogenization uses A335P5 ； The heating furnaces in distillation systems are generally made of 20# carbon steel.
GB 3087-2008 Seamless steel tubes for low and medium pressure boilers
Previously, the material of the furnace tubes in our heating furnaces was 2520.
There are various materials available for the furnace tubes in heating furnaces. The choice of material for these tubes depends on factors such as the designed wall temperature, the designed pressure, and the corrosive properties of the medium flowing inside the tubes; therefore, no general rule can be applied. The boiler tube standards listed for the 2nd and 4th floors are not generally used in heating furnaces; instead, GB9948 and ASTM standards are typically adopted. The maximum operating temperature of the furnace tube does not mean that existing heating furnaces can be used at this temperature. The maximum operating temperature of the furnace tubes in existing heating furnaces must not exceed the originally designed wall temperature of those tubes. Material Maximum operating temperature °C 20 450 P11 550 P22 600 P5 600 P9 650 TP304 815 TP321 815 TP347 815 TP316 815 TP310 1000 NO8810/8811 985
A friend has provided the applicable temperature ranges for various types of pipes; these details are not available in GB9948-2013. Are they listed in ASTM standards? Please provide information on the relevant ASTM standards. My email address is: 519835684@qq.com. Thank you.
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