foam discharge outlets in tank farm
foam discharge outlets in tank farm
(OP)
Hi!
I want to design low-level foam outlets at a diked area of a diesel storage tank farm. The outlets shall be directed to the dike wall in order to discharge foam to the wall and then to the liquid surface. Does anybody know at which minimum height below the top of the dike wall the outlets have to be placed? I want to avoid that foam is poored over the dike wall respectively in not diked areas.
Thanks to all!!!
I want to design low-level foam outlets at a diked area of a diesel storage tank farm. The outlets shall be directed to the dike wall in order to discharge foam to the wall and then to the liquid surface. Does anybody know at which minimum height below the top of the dike wall the outlets have to be placed? I want to avoid that foam is poored over the dike wall respectively in not diked areas.
Thanks to all!!!





RE: foam discharge outlets in tank farm
but::
http://www.williamsfire.com/Files/PRODUCT%20CLASSE...
http://www.chemguard.com/pdf/design-manuals/D10D03...
http://buckeyetest.com/foampdfs/F_Dike.pdf
RE: foam discharge outlets in tank farm
RE: foam discharge outlets in tank farm
You can always speak with your state fire marshall for recommendations.
RE: foam discharge outlets in tank farm
RE: foam discharge outlets in tank farm
the client wants such a system. the tankfarm is located in iraq and ambient temperatures can rise up to flashpoint temperature of diesel (+55°C).
thanks
RE: foam discharge outlets in tank farm
I suppose what your objective is to pour the foam and extend it uniformly, on the surface of the fuel pool, safe from the wind, turbulence, impingement, etc. expecting that it would work similar as a tank foam chamber.
The best approach is to buy a "listed", "approved" or "tested" deflector if you can find one.
Illustrations from the manufacturers (like those mentioned by cdafd), looks that a pipe 45° bend towards the wall do fine, and no specific height is mentioned.
I reckon that a low expansion foam would not require a specific pouring height, but it can be important on mid or high expansion foam.
Thinking of foam chamber deflectors, the Williams Spectrum LW9, etc., it looks that a specific deflector would work better than a bent pipe. I think a low expansion foam would work fine with any device but some would perform better. If I was allowed to design a personal idea, I´d try to use very efficient foam makers and copy a deflector similar to a foam chamber. But your client should know that it may not be the correct approach.
If it was the case, I´d try to avoid fixed dike devices and use fixed or mobile monitors with guaranteed and tested foam makers and/or nozzles, that you can point to any area of the dike. And you can get advice from manufacturers of what type of devices would work better for throwing foam in your conditions. I think this would do a more rational use of costly foam in case of fire too.
RE: foam discharge outlets in tank farm