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  1. barqueiroenmarte

    Help with EPA TANKS Software

    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...
  2. barqueiroenmarte

    Piping corrosion rates

    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.
  3. barqueiroenmarte

    Fluid transients software recommendation

    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...
  4. barqueiroenmarte

    Floating roof tank losses with EPA Tanks Software

    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...
  5. barqueiroenmarte

    Flashing losses in refineries

    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...
  6. barqueiroenmarte

    Flashing transient in closed vessel

    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...
  7. barqueiroenmarte

    Type of storage tank for high TVP products

    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...
  8. barqueiroenmarte

    Pour point and flash point estimation

    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
  9. barqueiroenmarte

    Floating roof tanks pressure relief

    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...
  10. barqueiroenmarte

    Hydrocarbons evaporation reduction

    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...
  11. barqueiroenmarte

    Mixing equipment for storage tanks

    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...
  12. barqueiroenmarte

    Bulk modulus of LPG

    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.
  13. barqueiroenmarte

    Pressure Equipment Directive Overpressure during fire

    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
  14. barqueiroenmarte

    LPG Storage Vapor Balance Line

    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...
  15. barqueiroenmarte

    Carbon steel rupture without deformation

    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...
  16. barqueiroenmarte

    LPG long transfer line

    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...
  17. barqueiroenmarte

    LPG Odorization

    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...

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