Jump to content

Help with pipes...


Recommended Posts

1 hour ago, Marsfc said:

What material can I use to make pipes that can withstand temperatures below 200º?

Pipes don`t overheat. They can melt but that won`t happen below 200oC.

It`s te contents that matter. If there`s a phase transition the pipe will break and release the content. Most of the time it`s best to use insulated pipes to reduce heat transfer. Ceramic is a pretty good insulator and suffices for most applications. If they keep breaking try making them as short as possible.

Reading the question, I think he's talking about "what can withstand very cold temperatures," not "what can stand heat of 200 C." Notice he didn't use a unit of measure. It could be that he's asking "what can withstand temperatures below 200 K?"

200 K of course is -73 C. I'm guessing he had some petroleum freeze in a pipe, and read "cold damage" to mean the pipe couldn't take -60 C (213 K). It's a misleading message, since it's not the pipe's problem, it's that the petroleum froze.

The answer to that question is "don't freeze liquids inside pipes, ever." Pipe material doesn't matter. Just what you have in the pipe. Super Coolant will go below 200 K without freezing. It's possible (but difficult) to make liquid oxygen without supercoolant, using very cold hydrogen, and that is well below 200 K since it doesn't liquefy until 90 K.

Along with not freezing things in pipes.. don't boil things in them either.  Or condense a gas to a liquid inside them.  State changes of any sort, even the transition from crude to petrol (which are both liquids) will cause the pipes to take damage.  The actual temperature of the pipe is usually irrelevant. 

Archived

This topic is now archived and is closed to further replies.

Please be aware that the content of this thread may be outdated and no longer applicable.

×
  • Create New...