B31.3 Category
B31.3 Category
(OP)
I'm going over a design for effluent from our mill and trying to determine if Category D or M should apply.
My thoughts are that although there is potential for biological (bacteria) harming a person coming into contact with it I wouldn't consider it damaging or irreversible. Temperature and pressure fit with Cat D. There is this nagging thought that because there "could" be an excursion in neutralization causing high or low pH or maybe H2S generation that it might classify as Cat M. Right now its Cat D but I want to be sure before proceeding - what do municpal plants categorize their sludge and effluent?
My thoughts are that although there is potential for biological (bacteria) harming a person coming into contact with it I wouldn't consider it damaging or irreversible. Temperature and pressure fit with Cat D. There is this nagging thought that because there "could" be an excursion in neutralization causing high or low pH or maybe H2S generation that it might classify as Cat M. Right now its Cat D but I want to be sure before proceeding - what do municpal plants categorize their sludge and effluent?





RE: B31.3 Category
RE: B31.3 Category
Regards, John
RE: B31.3 Category
...and everything else is "normal fluid service". That's the fourth category.
Your effluent is normal fluid service, no different than any other material which, if spilled, could represent a hazard but not kill people at a distance.
RE: B31.3 Category
Regards, John