If the Pipe is carbon steel. Anything wrong if I use a SST thermowell?

Question

If the Pipe is carbon steel. Anything wrong if I use a SST thermowell?

wahkao2 (Electrical)

(OP)

30 Dec 15 13:51

If the Pipe is carbon steel. Anything wrong if I use a SST thermowell? Or do I have to get a carbon steel thermowell to match it?

NBrink (Materials) · Answer 1 · 2015-12-30 14:53:10

It all depends on what's going through the pipe. There are services where carbon steel is perfectly suitable that you really don't want to use an austenitic stainless steel...

metengr (Materials) · Answer 2 · 2015-12-30 17:51:35

Not enough information. There could be concerns with thermal differential and corrosion. Frankly, I would stay away from dissimilar materials when at all possible.

EdStainless (Materials) · Answer 3 · 2015-12-30 19:29:03

Tell us about the service and we will tell you about the pros and cons.

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P.E. Metallurgy, Plymouth Tube

moltenmetal (Chemical) · Answer 4 · 2016-01-01 18:51:01

Sst is also less thermally conductive. The only time I'd use a SST thermo well in a carbon steel line is if NPT threads were permitted- then it's just a matter of convenience, as corrosion probably isn't a big risk ( or the threads themselves would be an issue)

weldstan (Materials) · Answer 5 · 2016-01-06 20:36:33

SST thermowells are often used in carbon steel pipe and many times wrongly so. As the other responders have stated, it depends on the service conditions.

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If the Pipe is carbon steel. Anything wrong if I use a SST thermowell?