When calculating the discharge capacity of safety valves for fires, how is the F factor usually taken into account?
Thread Content
This post was last edited by longkui1990 on 2017-12-4 at 13:11. In China, a value of 1 is generally used; abroad, I’ve seen that Fluor requires a value of at least 0.3. Please advise me on other cases. O(∩_∩)O Thank you
There are specific instructions in api520/521; you can take a look. However, it generally tends to be more conservative
Try to choose 1; for the rest, decide based on actual circumstances
I only found out recently that it’s possible to get 0.03 – it completely overturns what I’ve believed all these years
0.03? ? So small~~~~~ It even changed my perception
It’s no surprise that foreigners handle detailed tasks that require careful analysis; in China, people are always focused on meeting deadlines and worried about taking responsibility, so they don’t have the time to go through things carefully and opt for a more conservative approach instead
The API needs a fire-resistant insulation layer, but it’s not available.
Achieving such a low value indicates that the discharge temperature is very high; it is generally difficult to find the thermal conductivity of insulation materials at such high temperatures. If the vaporization temperature is higher than the allowable temperature of the equipment materials, safety valves become meaningless.