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what is a permissive in the cause and effect chart? is it the condition necessary to run the equipment/system back to normal again? does it only address the initiator of the shutdown condition? thanks.

hi everyone! i'd like to know what TRIM CLASS for a vessel/equipment is. as i understand it is the material spec of the pipes connected to it. is this correct? but what if the inlet and outlet piping materials differ? what would then be the trim class of that vessel/equipment? do you only...

hello everyone! how and when do you use a dummy valve in hydraulic calculations such as pump sizing? should or should it not have a pressure drop value? thanks.

hello everyone! how and when do you use a dummy valve in hydraulic calculations such as pump sizing? should or should it not have a pressure drop value? thanks.

thanks again guys for the replies. further questions. for the water cooling system, the exit temperature of the compressed is 37 deg C for both cases, when 1 and/or 2 compressors are running. i suppose the amount of cooling water is enough. is this correct? dew point for compressed air (3...

thanks for the replies. our system is designed in such a way that after the compressors, there is a heat exchanger which cools the compressed air and after it is a moisture separator. ash9144 may be right that because of the increase in velocity (due to 2 compressors running) some of the liquid...

how do you know that a moisture separator is undersized? our problem is that when two air compressors are running, we have liquid water carry over along our pipelines. at this condition, air pressure is varying as opposed to a stable pressure when only 1 compressor is running. does this mean...

i want to get the dew point of compressed air. how does pressure (e.g. compressed air is at 3 barg) affect the dew point of the original air? is there a formula or chart that i can use? the only data i have are dry bulb temperature and %RH. the charts and tables at perry's is only up to about...

i need to calculate the "dead zone" radius when our reactor overpressures. where can i find formulas which i can use to calculate them? thanks.

how do you measure/calculate for flow rate of water in a pipe? assuming you know its pressure and the pipe diameter? thanks.

hi everyone! thanks so much for the replies. actually, the heat exchanger im referring to is a cooler condenser. i am cooling compressed air to condense water out of it. i will be able to know the temperatures in and out of both the compressed air and cooling water but i don't have actual info...

hi tkdhwjd! i am referring to monitoring its performance, is it performing according to specifications, etc. thanks!

how do you rate a heat exchanger's performance? what parameters should one know aside from the inlet and outlet temperatures and pressures? thanks.

good day to everyone! i would like to ask you guys for help in removing moisture from our compressed air. our compressed air is used for conveying pellet resins through the pipelines and into silos. it is a must that moisture is virtually eliminated from the compressed air. air is discharged...