2016, Afternoon, Case 18
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18. A factory has a total of 4 chemical processing units. Under fire conditions, the maximum emissions of combustible gases from these units are 20,000 kg/h, 10,000 kg/h, 15,000 kg/h, and 5,000 kg/h respectively. These values are higher than the emissions occurring in cases of power outages or water supply disruptions. Therefore, the capacity of the flare system must be at least equal to which of the following values (in kg/h)? A 20,000 B 29,000 C 35,000 D 50,000. How should one approach this question? Are there any relevant standards?
It should be B. The discharge volume should be taken as 20,000 for the valve with the highest discharge volume, plus 30% of the discharge volume of the other safety valves, which is 29,000; the 30% figure is based on SH3009
Refer to SH3009-2013, Code for Design of Flammable Gas Emission Systems in Petrochemical Industries, Section 6.2. This question puzzled many people at the time.
Refer to SH3009-2013, Code for Design of Flammable Gas Emission Systems in Petrochemical Industries, Section 6.2. This question puzzled many people at the time.
This post was last edited by Grizzly on 2017-8-3 10:14. Aren’t the two largest totals 20,000 + 15,000 = 35,000?
According to what’s said on the 5th floor, it should be 35,000
Regarding the torch, it should be considered according to 6.2 d); isn’t it 29,000?
Regarding the torch, it should be considered according to 6.2 d); isn’t it 29,000?
There are 2 of the most important requirements in b.