What are the material requirements for pipelines whose medium is sulfur?
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Liquid sulfur is heated through pipelines and becomes gaseous. What material is required for the pipelines? What are the requirements for welding?
:Victory: It is recommended to use 316L PTFE, which has better anti-corrosion properties, but the temperature of liquid sulfur is difficult for PTFE materials to meet the requirements.
The PTFE mentioned above does not seem to be suitable for the temperature of the liquid flow. The temperature of the liquid flow should be controlled between 135--145 for the best fluidity. The temperature of PTFE can be used in media below 250 degrees. But we use ordinary carbon steel.
The gasification temperature of liquid sulfur is around 400°C. However, before gasification, the fluidity of liquid sulfur is extremely poor from 170°C. How to solve the problem of sufficient heat exchange? For pipes alone, 16M n pipes are enough. It should be noted that it is difficult to weld after the steel is soaked by sulfur. It must be welded well at the beginning, otherwise it will be difficult to repair leaks. It is recommended to use argon arc welding and 100% flaw detection.