What about the classification of pressure vessel categories when there are multiple working media?
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This post was last edited by sharon32 on 2015-9-14 17:34……Oops, I’m so nervous making my first post……Let me start by explaining the background……The working pressure is 0.4 MPa ； Volume 3442L ； The working medium is natural gas, condensate, water ； Design pressure 1.55 MPa ； Maximum operating temperature: 60℃ ； Insulated ； ……………………Is this enough…………………… P.S. I don’t know what that condensate is either, but it seems to be dirty oil. That's it. P.S. That’s all. I do have a reference; the operating conditions are almost exactly the same, but I don’t quite understand it. . 1. First is Article 3 on the scope of application of the Fixed Capacity Regulations – water can’t boil at 60 degrees, right? It’s mainly natural gas, right? But the device has only an oil inlet and no gas inlet? Since it has been classified as such a container and is also subject to supervision under the Fixed Pressure Vessels Regulations, it is at least a pressure vessel, right? But why? But I don’t understand this either. I'm an idiot. . 2 Then comes the classification. In this case, there are three types of working media, and it’s still because of the presence of water that I don’t understand whether this container should be classified as the first type of medium That’s all. First, thank you all! Haha
Classification is based on the medium being natural gas...
But it doesn’t have any air inlet or anything; there are only a few oil in/out ports. . Why was natural gas chosen?
Of course, it uses natural gas as the medium; it has nothing to do with the inlet. As long as the sealed container falls within the scope of application of the Regulations on Solid Pressure Vessels, it is considered a pressure vessel.
Obviously, natural gas is entrained or separated when dirty oil enters, so it is classified according to natural gas
When there is natural gas and the gas phase pressure PV is greater than 2.5 MPa, it is of course subject to supervision under the fixed-volume regulation. Natural gas is considered explosive, so it should be classified as such! ! !
Ordinary users need to specify the approximate composition and content of the medium; they are generally grouped according to the medium with the most severe properties. In the case of the medium mentioned by the poster, natural gas is definitely the main component, and methane is an explosive substance, so it should be classified as part of the first group of media. Once that is done, the poster can then determine the appropriate category for it.
Generally, the first one mentioned is taken as the standard. . . . .