How to calculate the diameter of a safety valve with a set pressure of less than 0.1 MPa gauge pressure?
Thread Content
There were previous posts on the forum discussing whether safety valves with a set pressure of 5 kPa gauge pressure existed; some people said they did. So the question is, if such a thing does exist, should the calculation of the safety valve be done in accordance with those regulations? HG20570 specifies that it is applicable only to the installation and calculation of safety valves on pressure vessels with a pressure greater than 0.2 MPa; the scope defined in SY10044-2002 (i.e., API520) also applies to pressure relief devices with a gauge pressure of 103.4 kPa or higher. So, can the calculation for the diameter of the safety valve with a set pressure of 5 kPa gauge pressure still use the formula from the aforementioned standards?
It’s so frustrating that no one replies to posts after such a long time; it’s better to post them in the crafts section instead. I have to solve it on my own; recently I found a hydraulic safety valve that serves as an emergency release mechanism when the breathing valve fails. I’m still confused about the question in the post above.
I’ve run into this problem too; unfortunately, no expert has answered it
I’ve run into this problem too; I’m just waiting for an expert
It seems there’s no standard for such low pressure. I previously inquired about a company that manufactures 50kpa safety valves.