Aoa Friends,

My question is about the PSV sizing criteria for liquid NH3 service for following two scenarios;

1. Error of operation - over pressurization
2. Fire scenario

In case of over pressurization of liquid NH3 we can size a PSV with a specific orifice size. Now for the second scenario wih ...

And to be very precise please go for a minimum range digital gauge d/s of the orifice, prefereably 1.0 bar.
Another thing that give error to the DP reading is the rubber bung installed at the bottom end of the DP rig apparatus. If it is not properly selected or damaged due to continuous use, the ...

The relevant standard for the Hazardous area classification for electrical applications in Petro chemical facilities is API-500, 500A & API-505. It explains the different classes and zone with the concentration of various hazardous and flammable materials as well as the ventilation criterias.

Now ...

Salam Dear Imran,

I agree with Tosif. We may not be able to save your machine by manipulating turbine speed rather anti-surge controllers. In general, anti-surge valves, recycle or vent process gas maintaining a defined +ve flow across the compressor. if we try to manipulate it using our ramped ...

Wasalam Ahmed,

If i understand correctly, there are two separate parts of your question; a) Design duty of the Heaters [related with the designing of the exchanger] b) Fouling in heaters and its effects?

Heat duty of any heat exchanger, as imran said, is primarily based on its design or TEMA ...

I think its quite efficiently explained by imran, tousif and wasim about the use of Hysys and a little background or pre-requirements for the use of not just Hysys but any other simulation software...

The most important think to consider, is the understanding of the process you wish to simulate ...