What material is best suitable for making flat gaskets that are resistant to corrosion and high temperatures?
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This post was last edited by bage on 2011-10-16 at 11:37. I want to use flat gaskets for sealing at the threaded connections; the gaskets need to have corrosion resistance equal to or better than that of 316 material. The operating temperature is 300 degrees, and the pressure tolerance should be within 2 MPa. The specifications are φ27×φ21×1~2. I would like to ask experts what material would be suitable for this purpose? Add one more point: The medium contains fatty acids. Last edited by bage on 2009-3-4 19:18]
It should be fine; we use copper pads, so there’s no problem!
Reply to posts 2 and 3: Can copper gaskets resist fatty acid corrosion?
Copper gaskets are a suitable choice; copper possesses corrosion resistance and high-temperature tolerance, and its anti-corrosion capabilities are comparable to those of 316L. Its price is similar to that of 316L, though slightly higher.
Using copper gaskets is an option, but due to temperature fluctuations, the threads need to be tightened frequently; otherwise, leaks are likely to occur. It is recommended to use SWAGELOK connectors, although they are relatively expensive. (It seems that there are manufacturers in China that produce similar products.)
You can give it a try using polyvinyl ethylene polymer plastic sheets
Graphite gaskets should work fine. Heat-resistant and corrosion-resistant
Copper gaskets can be used; PTFE gaskets cannot, as PTFE material can withstand temperatures up to 150 degrees only.
Use graphite combined with 316 metal wound gaskets; copper gaskets are not suitable under the given conditions as they are not durable enough and pose a safety risk.
I agree with what was said upstairs: use graphite combined with 316 metal wound gaskets. If a thickness of 1 mm is required, gaskets made of graphite combined with steel strips (316) can also be used, as these offer good strength and sealing properties. For use on pipe threads, fully graphite-based seals can be employed, about 3 mm thick; however, it’s necessary to create a counterbore to enclose the graphite and prevent it from being damaged
It is recommended to use: metal wound gaskets made of graphite stainless steel wire.