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Hi, I have a question when specifying pressure drop across a control. If the upstream pressure is 300psig, and the fluid will flow to a downstream vessel operating at 30psig, would the delta P specified be 270psig? The fluid also has to travel about 200ft before reaching the downstream vessel...

myrdale, I was wondering about your "blowdown" tank. Currently, we have these types of tanks in our plant, which recieve spent chemicals, oils/waxes, etc that get "blown down" to this type of tank. I was wondering, how to calculate the blow down rate to this tank?

Hi all, We have an atmospheric storage tank containing chemical. I believe it is an API 620 storage tank, as the MAWP is 14.5 psig. We need to install a PVRV (breather) on this tank. I am confused as to what the set pressure should be. I know an API 650 tank is not allowed any accumulation, I...

Thanks for your response. I think there may be some confusion, there are no UV stabilizers added to the process. This is actually less of a product spec concern and more of a safety concern. We have seen in the past, that visible colour change of our pellets is a tell-tale sign of an impending...

Hi, I am looking for a manufacturer of an application/system that can provide continuous UV detection to identify if our pellets are off-spec or there is a more serious problem in our process. We would like to do this before visible colour change occurs. Right now we can do this in a batch...

with the steam trap, does the flashed steam remain "live" within the system or is there additional piping to route it somewhere?

Just to further clarify, steam to the HX is low presure steam at about 40psig.

What is the issue with having flashed steam venting to atmposhere from the condensate tank?

Compositepro: This will be an open condensate sytem with no back pressure. The condensate tank will be open to atmposphere and the piping will be sloped downwards from the HX to the tank then pumped to the boiler.

Yes, I was thinking the same thing but was a bit confused when looking at vendor systems which all incorporate a steam trap on the condensate line to the condensate tank/receiver. Typically if the pressure differential is 75 psi you can return the flashed steam to a low pressure user, but this...

Hi, I am looking to recover condensate from a heat exchanger back to the boiler. Condensate will gravity drain from the exchanger to a condensate tank and then it will be pumped back to the boiler. I am confused as to whether or not I need a steam trap on the condensate line from the HX to...

when i was looking for my first job a few years ago i cold called the engineering manager and persisted until he gave me an interview...he told me the reason he hired me was for my tenacity...i guess it can go both ways...in this case the ad said to call or e-mail (the recruitment manager)..so i...

I want to inquire about employment and career opportunities at a company. I have the name, number and e-mail of the recruitment manager but also of the engineering manager. The question now is, do i bypass the recruitment manager and call the engineering manager directly? Would this look bad or...

no energy balance in the sense of input and output streams is required...i was just trying to calculate the amount of direct heat injection into a vessel, it was just a simple Q = m Cp delta T...once you calculate the energy required divide by the total enthalpy in the steam at the supply...

yes i can do the energy balance actually i think what was throwing me off was the water in the vessel...its been a long time since i did this calculation but i can calculate the energy needed to heat the steam by first determining the mass of water in the vessel when its half full...after...

Hi, I have a vessel which is half-filled with water. They want to use steam to heat it up at a rate of 20 deg C per hour. How do I calculate the the steam flow in kg/hr for the required heat increase?

I have a copy of this book and to be honest its more beneficial to purchase GPSA or get your hands on a copy of that because basically everything in this book is found in GPSA, which is much more thorough..

It has a lot to do with what i'm doing and happiness... The job at the EPC company is where I would like to work and has the projects I am interested in..the pay is just a bonus... in that sense I want to make the switch, the job security is whats bugging me, but I guess at the end of the day...

I have used VMGSim as well, and it seems to be almost identical to ProMax from what I can tell, the thermodynamic package is also very powerful...might be worth checking it out if you're comparing costs..

I have an offer from a major EPCM company. I am concerned about the falling oil prices, and how this will effect their work. They have a lot of employees, mostly working on oil sands projects, refineries, etc. With oil at around $70/bbl right now, with signs of declining further, it is the...