PTFE modified Firesafe property
PTFE modified Firesafe property
(OP)
In my refinery many PTFE modified gaskets (Garlock Red Gylon type) are used in H2SO4 piping. Recentely many PTFE lined ball valves are used too.
I want know your opinion and your experiences about the firesafe property of this material inside the Alkilation plant and inside the pipeway outside of the plant
Thanks
Aldo Cigna
I want know your opinion and your experiences about the firesafe property of this material inside the Alkilation plant and inside the pipeway outside of the plant
Thanks
Aldo Cigna





RE: PTFE modified Firesafe property
'Gaskets' compatible to your liquid and temperature (PTFE,FKM) will in a fire melt or burn at a certain point (depending on fire development).
If the normal inforced are not compatible, there could be that neiter certified firesafe gaskets or firesafe tested /certified valves exists in the market suitable
for your process.
Remember that firesafe tests for valves actually involves
a complicated and costly test where you actually test with fire and burn out the valves, and that you afterwards have to test with pressure against minimum leakage requirements.
You therefore have a difference between a firesafe certified tested component, and a certified designed component. The design is similar to other components already tested, but that particular type, size or pressure class (whatever) is not tested istself.
If you do not find components that qualify in either aspect all fire-resisting estimates for a product will then at best be a non-qualified guesstimate, with at best a doubtful juridical backing, should the worst happen.
In this case my advice is to look at the total fire and accident protection for pipeline with sourronding buildings, areas etc with emergency shut-downs, relief, fire- and explosion preventing devices.
RE: PTFE modified Firesafe property
I've found in the EngineeringValves internet web site some firesafe certified metallic ball valves with a PTFE metal renforced seat
Perhaps, in the same way, could be possible find a firesafe certified fully lined PTFE ball valves. Do you know some ones?
Thanks very much
RE: PTFE modified Firesafe property
Dn100 and DN200
Thanks
Aldo Cigna
RE: PTFE modified Firesafe property
what metal temperatures are you expecting for the fire rating
RE: PTFE modified Firesafe property
The ptfe lining have to remain under 200°C max
the protection should be like api 6fd firesafe std
RE: PTFE modified Firesafe property
good luck
RE: PTFE modified Firesafe property
We have one H2SO4 regeneration plant but in that case there is no problem for fire
At first the piping specification previewed asbestos gasket (Garlok 400) for this service but now actualy we use PTFE gasket and packing and PTFE lined components. The garphite products (Gasket for example) are not usable in H2SO4 service >95%
RE: PTFE modified Firesafe property
RE: PTFE modified Firesafe property