Seeking advice on gaskets for high-temperature heat exchanger tube boxes
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The standard maximum operating temperature for tube box gaskets is 450 degrees; the current design temperature is 500 degrees. How should tube box gaskets be selected in this case? Seeking advice from experts
NBT 47020-2012 specifies requirements for flanges of pressure vessels, while GBT 29463.-2012 covers gaskets used in shell-and-tube heat exchangers. The allowable operating temperature of the gaskets is determined based on the pressure rating, which ranges from 0 to 6.4 MPa. When selecting a gasket, both pressure and temperature factors must be taken into account, with the choice being made by referring to the gasket’s temperature-pressure curve.
The key function of this seal is mainly to prevent graphite from burning out. The best graphite must be used, and the material for the reinforcement rings should be stainless steel. You can turn to gasket manufacturers such as Fluoride and Aizhi; they all produce gaskets for high-temperature applications.
At this temperature, the ablation rate of graphite is relatively high, which reduces the reliability and durability of gaskets. It is recommended to use thermoculite materials for gaskets. Further discussions are welcome regarding the appropriate technical choices and detailed technical information.
Our company has a high-temperature gasket that can meet your requirements
The tube box gaskets shall be purchased in accordance with the drawing requirements, but the design temperature must be specified.