sarjahe
New member
- Location
- SF East Bay, CA, USA
When I was 'in the trade', umpteen years ago, the most explosion proof work I ever did was probably a forklift refueling station. So I know the classification exists just not a lot more.
I have been informed that 'they' want to place three ethanol recirculation systems in our ISO 7 cleanroom. All together they will hold 50 gallons. 15 gallon drums, on carts with secondary containment, will transport the ethanol in and out of the cleanroom. The smallest system is enclosed in a SST cabinet using gravity transfer. The larger systems use pumps, tubing and so on. One has secondary containment. The other does not (engineering decision). This is R&D so the systems are designed here by fresh from school engineers.
What will the presence of these systems do to the code classification of the cleanroom? Does every machine and hook-up in there now need to be NEMA 7X? Does the air circulation provide sufficient fume removal to escape explosion proof requirements? I wish I could proceed from the ignorance is bliss prospective like our engineers, but alas I know just enough to be worried. Enlighten me please.
I have been informed that 'they' want to place three ethanol recirculation systems in our ISO 7 cleanroom. All together they will hold 50 gallons. 15 gallon drums, on carts with secondary containment, will transport the ethanol in and out of the cleanroom. The smallest system is enclosed in a SST cabinet using gravity transfer. The larger systems use pumps, tubing and so on. One has secondary containment. The other does not (engineering decision). This is R&D so the systems are designed here by fresh from school engineers.
What will the presence of these systems do to the code classification of the cleanroom? Does every machine and hook-up in there now need to be NEMA 7X? Does the air circulation provide sufficient fume removal to escape explosion proof requirements? I wish I could proceed from the ignorance is bliss prospective like our engineers, but alas I know just enough to be worried. Enlighten me please.
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