Steam and static discharge.
Steam and static discharge.
(OP)
Hi
We regularly use Nitrogen from trasfer of material from one vessel to another via pressurisation of the vessel to trasfer along the pipe.
A project I am working on has highlighted that the opperators always combine the 5bar Nitrogen with the 9bar steam to speed things up!!!
I have read many instances where steam /condesate has been linked to static discharge leading to explosions in flamable atms.
But would the same be true of what my operators are doing with 5 bar Nitrogen and 9 bar steam?
Safe solution open to me is just incease nitrogen to 10Bar.
We regularly use Nitrogen from trasfer of material from one vessel to another via pressurisation of the vessel to trasfer along the pipe.
A project I am working on has highlighted that the opperators always combine the 5bar Nitrogen with the 9bar steam to speed things up!!!
I have read many instances where steam /condesate has been linked to static discharge leading to explosions in flamable atms.
But would the same be true of what my operators are doing with 5 bar Nitrogen and 9 bar steam?
Safe solution open to me is just incease nitrogen to 10Bar.





RE: Steam and static discharge.
If money is no object, look at the high tech static dissipative plastic materials to solve your concerns. However, if you can pressurize the Nitrogen to 10 bar, that's the best solution.
cheers,
gr2vessels
RE: Steam and static discharge.
You need to understand what pressure they are actually doing the transfer at- and what the volume limitation is on the nitrogen system at that pressure. I'd suspect they're using the steam to provide additional volume rather than pressure.
RE: Steam and static discharge.
Yes you are correct, they are not pressurising upto 9 bar.
Pressure is genarally about 2 bar and trasfer takes about 10 mins when both steam and nitrogen are being used.
When only either steam (@9 bar) or Nitrogen (@5 Bar) are used it can take upto 20 mins.
RE: Steam and static discharge.
RE: Steam and static discharge.
Yes it just takes them longer when they one only one of either steam or Nitrogen. 20 mins vers about 5/10 min
RE: Steam and static discharge.
Chers
RE: Steam and static discharge.
RE: Steam and static discharge.
RE: Steam and static discharge.
We recived the complted sheet back, and all times, both nitrogen and steam had been ticked.
Operators being operators! we asked them to confirm their actions, and yes they do both because "it is faster"