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Underground Atmospheric Tank Venting
#1
Posted 22 September 2016 - 09:36 AM
I am in the process of replacing an underground atmospheric sump tank (gravity driven). The product is gas condensate. The tank will have 4m high vent complete with inline flame arrestor. We had a HAZOP done where it was identified a possible scenario of blocked flame arrestor while pumping out (about 4m3). The tank is designed for 5mbar vacuum. Client is asking me to find out design vacuum for the flame arrestor. Also how much vacuum 4m3 will generate (with/without blocked flame arresotor).
How do I find out vaccum generated by a particular pump out operation.
Apologies if this has been asked before.
Thanks.
#2
Posted 23 September 2016 - 01:20 AM
shahzadshah,
Puming out rate should be reported within a time duration; i.e. 4 m3/hr...
If API 2000 can be applied to the tank you can use it to find inbreathing rate due to pumping out...
#3
Posted 26 September 2016 - 03:37 AM
Thank you Naser and my apologies for late reply; I was away.
pumping out time is 15 minutes. I have pasted the calculation below( sorry didn't know how to attach it). Kindly check if these are correct.
#4
Posted 26 September 2016 - 04:06 AM
shahzadshah,
You should also attach a sketch or drawing of the system you described. To attach any file you can use "More reply options" below the box in which you are writing the reply.
Edited by fallah, 27 September 2016 - 06:05 AM.
#5
Posted 26 September 2016 - 09:25 AM
Fallah,
Thanks again. Please see attached marked node describing the system(inlet/outlet). Also reminder about my question. How do you find the negative pressure created by pumping out assuming the vent/flame arrestor is blocked.
Regards.
Attached Files
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