Opinions on how this foam spill happened??
Opinions on how this foam spill happened??
(OP)
We have a diverse group of people here and perhaps someone can help with an investigation. Attached are the details of a foam spill from a horizontal bladder tank. Any notions on exactly what might have happened would be greatly appreciated.





RE: Opinions on how this foam spill happened??
RE: Opinions on how this foam spill happened??
The bladder will crush down onto the perforated pipe preventing the siphon from being broken when much of the tank contents are already discharged.
A vented tank would air lock in this same situation.
RE: Opinions on how this foam spill happened??
Since the tank / bladder was presumably overfilled and waiting to discharge the foam bubbles at the top of the bag before it discharged product, I assume that this was what precipitated the event. Why it continued is what puzzles me. It would seem rather unlikely that the bladder would be so flexible as to cover the perforations on the siphon tube the way it appears to be designed, but I have not seen the actual piping for myself, just the manufacturers drawing as you see it in the attached pdf. Perhaps you are right. I am awaiting a response from the manufacturer also.
Thx again
RE: Opinions on how this foam spill happened??
When the bladder folded and creased and stopped contracting, the siphoning foam would stop.
RE: Opinions on how this foam spill happened??