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Dear all Our plant suffer from the leakage on convection tube in heater. The convection tube is for making saturated steam, and recently chemicals for BFW was changed. So we suspected failure of water chemistry, and try to repair the leaked tube with plugging way because there is no spared...

Dear Chemical13 What specification did you select on Monitoring tab in Hysys? For the first step, flow rate on each draw and pumparound and reflux flow would be proper to get converged, and then you can try to get products on draw-off, which meet property targets such as flash point, with...

Dear Milutin One of my collegue who is responsible for off-site such as additives for gasoline and diesel said that it could be possibe when some additives is unstable by oxidative environment especially there is agitating or air bubbling. After he changed Detergent and WAFI into new one...

Dear all, I'd like to get your recommendation on long term training course for pertroleum engineering. One of example is IFP school in Paris, and they serve a viriety of courses for training for 11 to 22 months. Thanks.

Dear all, I'd like to get your recommendation on long term training course for pertroleum engineering. One of example is IFP school in Paris, and they serve a viriety of courses for training for 11 to 22 months. Thanks.

Dear dcasto, In your gasoline Merox, isn't there clay filter? And, through the Sand Filter, which properties of gasoline is improved? Thanks

Dear Colleagues! I'd like to ask about UOP Merox Prococess,that is sweetening process, especially Kerosene case. Thesedays my plant suffer from pressure drop increase at Clay Filter in Merox. If it is not due to water or caustic carry-over to Clay Filter, what do you think another cause or...

Dear Milutin Thank you for your kind reply. So, you said the original fuction of overflash is refulx for fractionation between AGO and residue, didn't you? If there is no over-flash system, could we loose a theoretical separation stage? Best Regards,

Dear Everyone, You know over-flash flow in atmospheric fractionator, which is down-flowing outside of flash zone. It is a kind indicator of fractionator's condition, especially bottom zone to take a hint whether there is flooding..etc. What is original fuction of over-flash flow in the...

Dear Everybody, Deep HDS Unit into which vacuum residue is fed has high chloride concentration problem in its Stripper Condenser. Basically, the salt from crude is almost removed through desalters, and a little residual salt such as NaCl is going to vacuum tower, however, NaCl dosen't like to...

Dear everyone Thesedays I have a experience of copper strip fail with C3 Product which is passed through UOP's Merox, also, we checked H2S in C3, result is yes. If your plant has UOP's Merox, how do you think the cause of H2S remaining in C3? We have pre-wash column for H2S removal and maintain...

Dear everyone, I'd like to tell you about sludge stuff in my refinery. Normal and positive way to get out sludge which is mixture of 70% of oil and 30% of water around is the De-sludge work from empty Crude tank. However, when the number of crude tank is limited and no time for tank empty, if...

Dear everyone In my crude distillation plant, butane is rundown through the MEROX system which is for removing sulfur contents in butane to pass the caustic extractor to make disulfide from hydrogen sulfide, and this disulfide(RSSR) is removed to be separated from caustic flow. By the way, if...

Dear All, esp, Milutin and 25362! Truly appreciate your replies, and it's very benefit. By the way, another point I want to know is how high temperature is allowable for stripping steam. Is there any high limitation on steam temperature. Why do we use normally LP-Steam for? Because the steam...

Dear All, I got a simple question, as you know, stripping steam at side stripper in crude distillation unit make to derease a partial pressure of oil portion in the stripper. Normally, there is Low Pressure Steam (~4.5bar, 160~180'C) to be stripping steam. Look, Question : is there any...

Dear All, I'm just wondering the mechanism of foaming generation in Amine(MEA, DEA, or MDEA) Absorber in Amine or TGTU plant, especiallly, when we fail temperature control between H2S gas and amine stream into the Absorber. It's known that the gap of temperature between the two steam is above...