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API 505-Appendix D Question

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Scott Darling

Jan 1, 1970
0
Hello all,

I have a question regarding area class determination as shown in API 505
Appendix D.

Most of it is straight forward but the one factor for determining the
distance of the classification is a little confusing... can anyone tell me
what the definition is of Mass Liquid Release Rate?

I assume it is how much leakage will come out of the seals/flanges of a pump
or the vents/flanges/valves of a tank or similar item during normal usage.
There is a little difference of opinion about this in the office so I was
wondering if there might be an official meaning to this?
Some folk seem to think it has to do with leakage during a fault or
emergency situation in which case how do you determine how much of a fault
is required.

Thanks
 
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