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Recent content by dkf

  1. dkf

    Crude oil storage in concrete tanks

    JStephen, thank you for comment and link. Interesting story
  2. dkf

    Crude oil storage in concrete tanks

    LI and MK Thank you for answering Next question is: anyone erected a concrete crude oil tank with 300ft dia and 50 ft hight? Could be cheaper in the long run than a steel traditional tank? TIA DKF
  3. dkf

    Crude oil storage in concrete tanks

    Hi everyone Any experiences with crude oil in reinforced concrete storage tanks? TIA DKF
  4. dkf

    Pipeline repair new technologies.........

    BI, thank you for contribution. In the last decades I have supported only one leakage that ocurred in one of the by-pass valves of the main SDV in a 24" pipeline transporting up to C5. When the emergency team arrived the next day and started to dig, the valve was encapsulated in a huge ice...
  5. dkf

    Pipeline repair new technologies.........

    Widening te scope of the search, I'd like to inform that we are aware of the services provided by TDW, FURMANITE and PLP. Any other services providers you know of interested in sites bellow the equator? TIA DKF
  6. dkf

    Pipeline repair new technologies.........

    To MickMc, we have a local office of Furmanite, but it seems that they provide only the common solutions. To all: The question is: what new technologies are being developped for a lpg leaking pipeline emergency repair? -Is anyone developping something like crimping the pipeline? Wellheads use...
  7. dkf

    Pipeline repair new technologies.........

    Yes, racookpe1978, but our focus is just to be aware that we use the best available procedure/process to perform the "STOP THE LEAKAGE". After this step, we will permanently repair the pipeline according to rules and procedures in current use. Thanks for commenting. DKF
  8. dkf

    Pipeline repair new technologies.........

    Well, let me try LPG pipelines from 8" to 20" dia some class 600# due to topography. As for permanent repair there is no doubt. The question is for the first actions as to stop the leakage and condition for the permanent repair. We see that freezing is one option, but you have to inject water in...
  9. dkf

    Pipeline repair new technologies.........

    Little and BigInch Pipe break, or intrusion in a liquid conducting pipe. How to stop a static liquid column prior to full empty by gravity. Yes the question was too generic. Please excuse. DKF
  10. dkf

    Pipeline repair new technologies.........

    Hi everybody! Curious to see if there is any new technology or method for pipeline repair that is not referred in ASME PCC-2 ? Any comments will be wlcome. Thanks DKF
  11. dkf

    Crude oil tank mixers

    In most cases we do mixing for every batch once we have to dilute heavy locally produced crude. Our mixing is to homogenize and to decrease the sludge formation. We use locally supplied mixers, not the sturdiest type. And this is the headache for maintenance. By the way how do you measure the...
  12. dkf

    Crude oil tank mixers

    Hi JAS, We are aware that P43 Jet Mixers are more efficient than SEM for crude homogenizing and minimizing sludge formation. But they are more expensive for installation, difficult to maintain and require more energy to run. In your comparative study did you consider all these parameters? Thank...
  13. dkf

    Crude oil tank mixers

    Hi everyone! Talking to local maintenance people, their main challenge is to keep side entering mixers operative for 10, 15 years. In some instances the tank that cannot stop for maintenance operates without mixers for years. And in those cases we have to remove huge ammounts of sludge prior to...
  14. dkf

    Emergency Roof Drains Paper - in Chinese

    I found the following reference: Calculation and Application Example of Emergency Roof Drains HU Chun-wei1,ZHANG Jun-sheng2(1.China Petroleum Pipeline Engineering Corporation,Langfang 065000,China;2.China Petroleum The First Construction Corporation,Luoyang 471023,China) The functions and...
  15. dkf

    Double deck EFRT- Emergency drains maximum flow

    When emergency drains begin to operate we are to use weir flow approach until we have full/complete section flow. From that condition on, assuming static head is increasing, what would be the best way to estimate water flow? How to consider influence of floating roof in the flow, once water...
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