Using PTFE scrappers in a XP vessel 1

[enghelpneeded]

Hi,

Are there any specific concerns about using an insulator (PTFE) in a XP rated vessel in terms of static build-up/discharge while mixing an alcohol based product.

Thanks.

 

[moltenmetal]

Vessels aren't "rated XP"- and the vessel itself is very unlikely to be explosion proof-

Motors etc. are rated explosion proof, so by this I'm assuming you're trying to mix or blend something in a vessel which contains both air/oxygen and a flammable liquid or gas. The first suggestion would be DON'T DO THAT- inert the atmosphere to remove the explosion risk if at all possible. Otherwise, any source of ignition will generate an explosion.

As far as static discharge is concerned, not that I'd rely on this alone to prevent what would otherwise certainly be an explosion, there are static dissipative blends of teflon containing carbon that can be used. They are used for one example in some teflon flex hoses with stainless steel overbraid, to keep static discharges from jumping through the tubing to the sheath which can apparently punch a hole through the teflon liner.

 

[EdStainless]

And when you start looking at polymers you need to know that 'conductivity' and 'static disaptive' are two different things.
The difference is how much of a charge can build up.

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P.E. Metallurgy, Plymouth Tube