Boil over and AST foam protection. I need coments.
Boil over and AST foam protection. I need coments.
(OP)
Dear everybody.
This was also posted in the NFPA Fire protection forum, but maybe here somebody can help me.
In NFPA 30-96,99 (Definitions 1.6) they define the fenomenom of boil-over. They say that "most crude oils" present this risk.
I thought that boil-over could be developed in any oil (less dense than water) when the conditions associated with boil-over are met to complicate a fire. (I´m thinking of above ground storage tanks vertical 10 to 28 m diam. with fixed cone roof, capacities aprox. from 1850m3 to 5000 m3 (12000 to 30000 bbl)).
Query 1.
I´d like to know if heavy fuel oil (HFO) or fuel oil #6 and diesel (fuel oil #2) can be considered as a typical boil-over oil.
Query 2.
We are buying some fire protection equipment and they say that foam chambers are no recomended for fuel oil #6 (HFO) since it is less volatile and it has boil-over characteristics. Can somebody tell me a comment on if this is true and what are the bases for this? Is boil-over an aspect that must be considered on indicating foam chamber protection or not?.
(They are including foam chambers for diesel tanks, but not for the HFO tank).
Query 3.
NFPA 11 (Foam) requires that for foam protection for tanks (chambers) must include foam protection for diked area. Can somebody give info about the type of hidrants, nozzles or monitors recomended for this dike foam protection?.
Any comment will help. Thanks, luck & blessings to everybody.
This was also posted in the NFPA Fire protection forum, but maybe here somebody can help me.
In NFPA 30-96,99 (Definitions 1.6) they define the fenomenom of boil-over. They say that "most crude oils" present this risk.
I thought that boil-over could be developed in any oil (less dense than water) when the conditions associated with boil-over are met to complicate a fire. (I´m thinking of above ground storage tanks vertical 10 to 28 m diam. with fixed cone roof, capacities aprox. from 1850m3 to 5000 m3 (12000 to 30000 bbl)).
Query 1.
I´d like to know if heavy fuel oil (HFO) or fuel oil #6 and diesel (fuel oil #2) can be considered as a typical boil-over oil.
Query 2.
We are buying some fire protection equipment and they say that foam chambers are no recomended for fuel oil #6 (HFO) since it is less volatile and it has boil-over characteristics. Can somebody tell me a comment on if this is true and what are the bases for this? Is boil-over an aspect that must be considered on indicating foam chamber protection or not?.
(They are including foam chambers for diesel tanks, but not for the HFO tank).
Query 3.
NFPA 11 (Foam) requires that for foam protection for tanks (chambers) must include foam protection for diked area. Can somebody give info about the type of hidrants, nozzles or monitors recomended for this dike foam protection?.
Any comment will help. Thanks, luck & blessings to everybody.
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