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I'd like to know about seal flushing and quench system used for a centrifugal pump. I have studied API 610, app.D, but I'd like to know how and based on which condition a seal flush plan is selected. when a quenching is also required? Thanks in advance

I’d like to know why on connecting pipe between a cooler/condenser located after a gas compressor and receiver/drum there is no valve? thanks

When a storage tank is blanketed with Nitrogen, which case is better : applying one control valve on nitrogen line entering the tank or 2 control valve, one of them on entering N2 and the other on outgoing gases and N2 from the tank. In first case outgoing gases can be drained through PVSV.

I have a question about body material of valve. Which type of material is suitable when the fluid is contain 25% (mole) of CO2 and 75% H2S? Can carbon steel be used as body material or only stainless steel is suitable? What ASTM codes are used for this case? Thanks in advance

when "A" letter is used as third letter in mechanical seal code as per H-7 appendix of API 610? what about "T" ?

where can I find that a fluid is corrosive or not?

how can I determine flow rate and discharge size of a pressure safety valve installed on upstream of a knock out drum?

where is the demister pad used in a knock out drum; in other word, when there is no necessity to use them?

what are the differences between Between Bearing centrifugal and Overhung pumps? where is used each of them ?

I need some basics about back-pressure. My problem is about sour gas flowing through a 12” pipe(branch) with pressure of 2 bara @ 39.45 deg.C. can it enter into a 52” or 24” header which sour gas with press. Of 1.5 bara @ 38 deg C is flowing through it? thanks

Does anynoe know a shortcut to calculate heat transfer between fluid in insulated pipe atmosphere and also between insulated storage tank and surrounding air? thanks

How can I calculate the proper flow rate for styrene monomer recirculating in order to avoide its polymerization resulted by heat transferred into the long pipe fluid? which consideration should be taken into account? Thanks

Has anyone ever had an experience with styrene transferring and sorage? when should TBC be injected into stored Styrene monomer? Thanks

sometimes I make doubt about basics, one of them is as follows: Assume that we have a pressurized vessel containing e.g. LPG and N2 is used for blanketing and its operating pressure is 8 bara at 20deg.C, so vapor pressure is 8 bara? it means that in NPSHa calculation Pa=Pv. Is it true? Don't we...

could anyone guide me about italian universities in chemical engineering field (especially oil & petrochemical branch)?

which is more suitable for caustic handling, API 610 or ANSI pump?

how can the vapor pressure of a liquid be calculated by HYSYS? thanks

How much pressure loss should be take into account for a control valve in piping design step. I know that it depends on control valve type, flow rate,... but maybe there would be a minimum pressure loss in primative piping design where we calculate pressure loss of line. Is there any standard...

I need a Typical P& ID for metering. could anyone hel me? Thanks

I have a problem with pipeline pressure drop calculation. the fluid is sour gas, input pressure is 2.5 bara and output must be 1.5 bara; but cosidering pressure drop due to pipe , 2 control valves and 1 flow orifice, loss is more than 1 bar. could you help me with this problem? Thanks in advance.