Safety valve discharge capacity under fire conditions, issue of outer wall correction factor
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I am currently performing calculations regarding the discharge volume of the safety valves for LNG. According to HG20570, for tanks with low-temperature insulation, since the insulation material is not flame-resistant, a correction factor of 1 is used for the outer wall. However, in the API standards, I couldn’t find any similar provisions regarding a correction factor for the outer wall due to insulation materials. I was wondering whether it’s simply because I didn’t find such information or if there’s some other reason. I know that the insulation materials are referred to in that API table, but the table doesn’t mention any correction factor for the outer wall of insulating materials.
This has been basically resolved; I’m not sure about the device you mentioned
You can check; there’s a corresponding table in API520, which is much clearer than HG20570