Recent content by ChemE2912

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...

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...

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...

Thanks Metengr, The process is aimed to recover liquids (C5+) from a gas stream. Therefore, we are attempting to expand the gas and cool it down to condense these liquids. In some circumnstances, where free water may be present, according to our simulator, we have the concern that SS instead of...

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...

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...

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...

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

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...

Thank you! Jaceksan et. al. Is there any Code and/or Standard that could support this idea of not repressurizing the vessel until we are above the minimum design temperature of the material? We have heard this from several people, but would like to know if we could have something more...

Hi All, Some vessels are SA 516 Gr 70 and impact tests were performed. But the flanges are SA-105 and necks are SA-106 Gr. B, as far as we know the material used for flanges and flanges necks are not suitable for low temperature services. We think now that the flanges/necks could be a weak...

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...

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

Thank you AIKMEAM, we indeed verified what you said, checking the flow regime in the line, and also ensured that we were not near the erosional velocity. Regards, ChemE2912

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...