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Dear all, I am working on a gas plant and for the first time I have seen an air cooler installed in the HP Flare Header, upstream of the KO Drum. This is in the P&IDs, not in the actual plant. Is this normal, and what it is more important, it is allowable? The relieving fluids will be very...

Latexman, Thanks. I thought I had seen it in an API Std but I couldn't find it... Regards

Hi everyone, I always design a vessel with segregated level bridles, one for controls and the other one for the trips. Is there any API Std where this is mentioned? I am trying to find a reference other than me saying this is the way to do it. Thanks

For the First Situation, as long as there is NO isolation valve between both equipment items then it should be ok for external fire case as long as it is sized correctly. Unfortunately have not got the API RPs here with me so I cannot check where this is mentioned (if it is mentioned, which I...

I have seen some RO's with multiple orifices (instead of a single orifice) distributed across the plate, this for high pressure drop. In some other cases we have sized pressure reducing apexes to be fitted in a spool, when the pressure drop required is so high for a single RO that would...

process1907, I suggest you to get a copy of "Crane Technical Paper No. 410", you can buy it here: http://www.flowoffluids.com/tp410.htm The book is really cheap compared to others in the market and will help you to solve your problem, basically there are many similar examples to the problem you...

Hi, This is the static pressure at the point of discharge, so for instance if the PSV is discharging to atmosphere this value will be 0, if on the other hand it is discharging to a vessel operating at 14 psig, this value will then be 14 psig. Or at least it is what I would have done. Regards.

subbuC3, I normally use either firstvue as recommended by ggordil or the equations in Crosby Control Valve Hadnbook (http://www.documentation.emersonprocess.com/groups/public/documents/book/cvh99.pdf). The last one is easy to follow and I have been using it for quite a long time. Regards.

Hi everybody, In a hypochlorite disengagement tank, it is stated in a NORSOK standard that the minimum residence time for the hydrogen to disengage from the water stream is 20 minutes an normal operating conditions. I am trying to demonstrate the minimum residence time by using Fick's Law of...

Yes well I undertand that the aim for having the PSV is to avoid further damage in this fire case scenario, by avoiding a "bomb" and keeping the situation as stable as possible... but yes equipment is assumed lost anyway I agree.

Does this mean that the vessel will collapse in a relief scenario? I have come accross this issue many times and it is true that sometimes the relieving temperature is higher than even the design temperature of the relief valve itself... any explanations? Still do not understand. Thanks.

I encourage you to contact Petreco in a first instance, they have provided many of these before and I am sure they will help you find the answer you want. These units are rated for up to 95% removal but obviously there are many parameters that affect the performance (temperature, viscosity and...

WEMCO is owned by Cameron by its Petreco Process System Branch. I may be able to help you. Cheers, kkimic

WEMCO is own by Cameron by its Petreco Process System Branch. I may be able to help you. Cheers, kkimic