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Hi Guys, I am working verifying if a PSV is required for fire case in a lube oil cooler (oil side). The exchanger is a plate and frame type with a thermal PSV in the water side. The heat exchanger is very small with 2" inlet and outlet lines for water and lube oil. Any advice will be...

Design Pressures: Inner tank: 1000 mmH20 Outer Tank: 25 psf (inclds vac)

Dear, I am working in a cryogenic ethylene tank turnaround. The vacuum relief valves are set to open at -20 mmH20 and during manteinance they were calibrated at -28 mmH20, my question is: is there any problem with the set pressure? is the integrity of the tank at risk because of the new set...

Hi, I am working in an Ethylene plant. The Ethylene cryo tank was opened for inspection and now we have to put it service. To put in service we have to first get ride of the Oxygen and Humidity. To get ride of the humidity I was told to use dry nitrogen. We will use to nitrogen evaporator. I...

Hi everybody, I would like to calculate the air required to increase the %O2 in the tank from 1.5% to 19.5%. The tank has 98.5% de N2 and we will be start purging with air. How many tank volumes are needed? Any help?

Imagine that I do not have the analyzer? and just know the temperature coming out.

Hi dcasto, Thanks for the info. But have you done some cals before to get those numbers?

Hi Everyone I need to know how can calculate the dewpoint in a tank that was opened. We are going inyect N2 to displace the O2 or Air and the client told me that the purge end when the N2 dewpoint coming in is ~ N2 dewpoint coming out. I was told that -60F or lower (1 atm) is a better...

Hi guys, Who has checked the example given in the Rules of Thumbs for CheEng pag 280? I would like to know how htey splitted the inert composition?