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I agree with everything in the last post (Montemayor). The relief valve will not prevent the vessel from rupturing in a fire, it should be automatically depressured at a rate that ensures that this does not happen. Traditionally this rate is to depressure to < 100 psi in 15 minutes, though I...

I agree with Tenac - I was wrong to say that the TEG will boil at the partial pressure of TEG in the column. Over here in Britain, every schoolboy knows that you can't make a decent cup of tea on Mount Everest, because the water boils at a lower temperature. That's why not many of us go there...

hskk, I would not expect the standard HYSYS equation of state to be capable of calculating accurately the latent heat of TEG . You need to get a data book on TEG, where enthalpy and physical properties are provided. I believe such books are published by Union Carbide and by Dow. The latent heat...

The explosion woke me and rattled the windows of my house in London, about 40 miles away. I have no information about the details so this is pure speculation, but I would think that this needs to be a vapour cloud explosion to be so powerful. That means a release of volatile vapour, and mixing...

Bourbon103, Yes that is correct, the flash will increase along the tailpipe as the pressure decreases. This means that you have to tackle the problem by considering the tailpipe in several sections, assuming a constant flash for each section. Your task is to find the size of tailpipe which will...

I basically agree with the last post (EGT01), and would add that the relief valve tailpipe should be sized to give no more than 10% back pressure at the flow capacity of the valve plus 10%, which will be significantly more than the calculated relief flowrate. The flash may be 4.8% wt but will be...

I have just joined this forum, so my reply is unfortunately two years too late for the original query. However, I would advise that the best method to use for sizing two-phase relief systems is the HEM (Homogeneous equilibrium Method)by Profs Hewitt, Richardson and Saville of Imperial College...