Most common fluoropolymers used for hose in aircraft engines?
Most common fluoropolymers used for hose in aircraft engines?
(OP)
Hello, does anyone has an idea on which are the most common types of teflon or fluoropolymers used for hoses?
Specifically, I am trying to find out the materials used in a teflon hose application, that is part of the hydraulic system of a reverse thrust device, in an aircraft engine
Any hint is welcome. Thanks
Specifically, I am trying to find out the materials used in a teflon hose application, that is part of the hydraulic system of a reverse thrust device, in an aircraft engine
Any hint is welcome. Thanks





RE: Most common fluoropolymers used for hose in aircraft engines?
RE: Most common fluoropolymers used for hose in aircraft engines?
My first guess would be that it is PTFE.
Some home grown tests in a simple laboratory are:-
Test specific gravity (you should confirm it, but I think from memory PTFE has an SG of 2.5)
Test for flammability. PTFE will not burn, but be careful as the degradation products are quite toxic.
PTFE will not melt. When heated sufficiently, it changes to a rubber like state.
If you can view it under a powerful microscope, you might see that it is not completely fused, but has some very fine porosity as the melt is so viscous, that even under tens of thousands of pounds per square inch, it does not force the powder to completely fuse.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Most common fluoropolymers used for hose in aircraft engines?
RE: Most common fluoropolymers used for hose in aircraft engines?
They reference Teflon on this page which as previously mentioned can be several different fluoropolymers. I believe in this case it is a PTFE liner.