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I am currently sizing the LP flare KO drum for an offshore project. In this particular instance, all potential discharges to the LP flare system are vapour only. In this case, is there any requirement to have a KO drum? If there is - what is the sizing basis for the liquid hold-up section...

Could anyone tell me - should all trips (i.e. those provided for machinery protection as well safety) associated with a plant be included in a SAFE chart or only the trips provided for safety as per API 14C??

My reference is ICI's 'Process SHE Guide No. 8 Pressure Relief' which states "Plate Exchangers: Fire relief is not usually needed as fluid under pressure will leak through the gaskets (and "feed the fire")".

Does anyone have any thoughts on the following...??? For a new offshore project we are providing gasketted plate type heat exchangers for the oil train. My thoughts are that installing a PSV on the hot side for fire (the cold side is provided with a PSV for thermal relief) is pointless as the...

Is it normal to assume that the instrument air supply fails during a fire case and all valves revert to their 'fail' position?

I am currently sizing the blowdown orifices and associated inlet/outlet piping for an offshore oil separation process. For sizing of the orifices I am using HYSYS's depressurisation utility. For critical flow, HYSYS estimates the orifice size using the orifice equation stated in Perry's (Pg...

My question was primarily related to offshore production separators. In reply to Hanon and 25362's statement, I agree - I think that an overflow weir is appropriate if it is necessary to thoroughly dehydrate the oil. If a 10% or more BS&W can be tolerated on the oil outlet, then a submerged...

Can anyone tell me when an overflow weir should be used, or a submerged weir, in a 3-phase horizontal separator. What are the advantages and disadvantages of the two?