Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: ChemE2912
  • Content: Threads
  • Order by date
  1. ChemE2912

    Contamination in multiproduct pipelines

    Hi there! Can anyone help me in giving some information about estimating the cross-contamination in a multiproduct pipeline when the transported fluids are separated by a mechanical device (i.e "a pig")? We have used the Austin-Palfrey Equation to calculate the interface volume, when not using...
  2. ChemE2912

    Gas Hydrates Prediction

    Hi there! I am working on a simulation for a gas conditioning system. I am confronting the following problem: When I expand the gas from 1330 psig down to the desired pressure in order to achieve the required properties (i.e., %methane), the simulator predicts gas hydrates in the two-phase...
  3. ChemE2912

    Gas Hydrates Prediction

    Hi there! I am working on a simulation for a gas conditioning system. I am confronting the following problem: When I expand the gas from 1330 psig down to the desired pressure in order to achieve the required properties (i.e., %methane), the simulator predicts gas hydrates in the two-phase...
  4. ChemE2912

    Best Material for a gas containing high CO2

    Hello! We are designing a new unit for recovering liquid hydrocarbons from a gas stream, which has a CO2 content of 10% molar. The stream is taken downstream from a gas dehydration (Tri-ethylene glycol) unit, and the water content of this stream is 12 lb/MMSCF of gas. The system pressure is...
  5. ChemE2912

    Best Material for high CO2 Content

    Hello! We are designing a new unit for recovering liquid hydrocarbons from a gas stream, which has a CO2 content of 10% molar. The stream is taken downstream from a gas dehydration (Tri-ethylene glycol) unit, and the water content of this stream is 12 lb/MMSCF of gas. The system pressure is...
  6. ChemE2912

    Heating Coil in a tank

    Hi there, We need to design a heating coil in a tank containing a heavy crude oil, in order to maintain it at 160 - 170 °F. Can anyone provide us the equations for estimating the heat transfer coefficient on the oil side? We intend to use a coil which is to be located at the tank bottom. The...
  7. ChemE2912

    Flushing oil requirements

    Hi there! Is there any design criteria for determining flushing oil requirements for equipment (i.e., flow rate)? Any help is well appreciated.
  8. ChemE2912

    Restriction for using valves in Flare KO Drums

    Hi there! Is there any limitation in installing a control valve (i.e. flow control valve), in a flare Knock out drum pumps discharge line?. The issue is that some vendors are recommending us to consider a centrifugal pump (I would rather use a positive displacement pump...) to pump out the...
  9. ChemE2912

    Minimum design metal temperature

    We are reviewing a vessel design where during depressurizing the fluid temperature can reach a temperature of -46 °C @ atm. pressure. The vessel material is not low temperature carbon steel. In some specification we found following "When depressurizing results in temperatures lower than the...
  10. ChemE2912

    Flare: smokeless operation with blower

    We would like to know for which king of hydrocarbons blower assisted flares shall be used when smokeless flaring is needed.
  11. ChemE2912

    TWO-PHASE FLOW IN A FEED LINE

    HI FOLKS, We are dealing with the following problem: The line that feeds a Crude Unit, coming from a heating train,which is 100 m away from the tower, handles a mixed phase product (vapor/liquid). The product leaving the heater is at 453 °F, and the tower pressure is 15 psig. The pipe that...
  12. ChemE2912

    Blower Flow rate measurement

    Hi All! Can anyone help us in finding out what would be the best possible location of a pitot tube for the flow measurement in a blower? Currently, we are locating it at the discharge line, but we have seen some arrangements showing it at the suction of the blower. Is there any significant...
  13. ChemE2912

    Top Tray Spacing Criteria in a Column

    Hi ALL! What would be the criteria for the separation of the top tray and tangent line in a stripper column? Can I assume a 24-36" spacing for this tray to allow a proper disengagement? (Column Diameter is approx. 3 ft) Is there any quantitative criteria (i.e. 0.5 x Column Diameter) to...
  14. ChemE2912

    Mist Eliminator in a Sour Stripper??

    Hey Folks! Does anyone know if there is any inconvenience in using a mist eliminator (Vane Type) in a sour water stripper? The concern is that if there is a temperature drop in the tower, or just because of the nature of the process, possible solids accumulation could occur, and therefore, the...
  15. ChemE2912

    Pump Inlet/Outlet Nozzle Erosional Effect

    I need to select an ANSI pump for a water treatment plant, with the following problem: According to the Process data we have calculated, the pump differential and flow rate, we have to select a 1x1.5 pump (outlet x inlet nozzle diameters). However, due to the nature of the fluid we are...
  16. ChemE2912

    Single Phase Pipe sizing criteria

    Hi Folks! I have been using the V = C/(Density^0.5) criteria for sizing lines, where C ranges from 90-160 and the Density is in lb/ft3. V is the critical velocity in ft/s. If C=160, then we tend to reach erosional velocity limits in the pipe. This rule is applicable for single and two-phase...
  17. ChemE2912

    Multitube Heat Exchanger Design

    Can anyone help me in finding the recommended correlations for the heat transfer coefficient and deltaP for the shell side in a multitube (hairpin) exchanger? Is there any table to determine the number tubes that fit in these shells, like in a normal Shell and tube exchanger?

Part and Inventory Search

Back
Top