Dear all,
I am using TANKS EPA software to estimate the emissions of a storage tank farm but I am facing two problems I don't know how to handle.
- I am using internal floating roof tanks with nitrogen blanketing in the space between the floating cover and the fixed roof. How does it affect the...
Dear all,
I am looking for any book or document providing corrosion rates (mm/year) for different services depending on the pipe material used (it is for a general study, so I am not looking for only one specific fluid).
Do you know of any good source?
Best regards and thank you for your help.
Hi all,
I am looking for a software to simulate fluid transients (mainly water and steam hammer in CCPP) with the following main features:
- Valid for compressible and incompressible simulations.
- With capabilities to define unbalanced forces in piping system (for a subsequent time-history...
Dear all! I am trying to estimate the losses (standing, working) of a floating roof tank using EPA Tanks software. In my case the storage tank receives gasoline from process units at a normal temperature of 35ºC, so the gasoline will cool down until its unloading to tankers. I have estimated...
Dear all,
I am preparing an initial report describing the emissions due to storage tanks (crude, intermediate products, final products) in refineries. I am considering working and standing losses and I am looking for information about flashing losses but everything I find regards to Exploration...
Dear all,
I am looking for any method to estimate the pressure variation inside a closed pressure vessel which is initillay filled with, for example, propane, at atmospheric temperature, when the liquid is taken out from it by means of a pump.
As far as I know, at a first stage, the propane...
Dear all,
I have a doubt regarding the most suitable type of tank (technically, economically) to storage products with a vapor pressure at the storage temperature close to the atmospheric (80 kPa<TVP<150 kPa). In this case, as far as I know floating roof tanks are not suitable so I suppose...
Daer all,
Do you know of any way to estimate the flash point and pour point of a hydrocarbon when knowing other properties such as density, viscosity, vapor pressure...?
Thank you
Dear all!
I have a doubt regarding if a floating roof tank must have a pressure-vacuum valve or it is not necessary. I mean, usually the roof floats on the liquid surface but if there is a very sudden temperature change or, even worse, if the roof gets blocked anyhow, how is the pressure in the...
Dear all,
I have sometimes heard that increasing the storage pressure of a tank containing hydrocarbons (i.e with inert blanketing) can help to reduce emissions but I don't understand it.
As far as I know, a liquid contained in a tank will evaporate until the partial pressure of that component...
Hello,
I am preparing an initial report about the available methods for mixing the different storage tanks of a refinery (crude, intermediate and final products)in order to minimize BSW, blending, homogenizing, etc (depending on the tank), showing their adventages and disadventages. We are...
Hello,
I am looking for the bulk modulus of butane and propane to perform a water hammer analysis. Any idea? After searching in Internet, Perry's, etc I have found nothing...
Thank you.
Dear all!
European Directive about Pressure Equipment (PED 97/23) states in its Annex I that safety valves overpressure shall not exceed 10%. Does anybody know if it applies to fire exposure as well or other maximum overpressure (i.e 21%) can be used in that emergency case?
Regards
Hello,
I am designing the conceptual engineering of a LPG storage, including six propane spheres of 3500 m3 each apart from other smaller bullets.
I have seen in previous projects (with smaller spheres) that is usual to connect all the vapor spaces of the spheres by means of a balance line. I...
Dear all.
I am a piping engineer (so no very involved in material engineering) and I am facing a problem with the rupture of a 12" carbon steel pipe which was buried, managing gas at ambient temperature.
My question regards to the way that the pipe has broken which is strange to me: without...
Hi!
I am designing a transfer system from three propane storage bullets (at atmospheric temperature, 400 m3 each, towards trucks loading facilities using a pump near the bullets and a vapor return line from the trucks to the bullets.
The distance from the bullets to the trucks loading point is...
Dear all,
I am defining the conceptual engineering of a new LPG loading terminal, which includes six LPG bullets, three for butane and three for propane, along with railcar and trucks loading facilities.
I don't have clear the best place to inject the odorant (ethyl mercaptan), if it is the...
