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  • Users: dkf
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  1. dkf

    Crude oil storage in concrete tanks

    Hi everyone Any experiences with crude oil in reinforced concrete storage tanks? TIA DKF
  2. 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
  3. 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...
  4. 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...
  5. 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...
  6. dkf

    EFRT-Emergency drains

    We have some 30000 m³ tanks with diesel that, during storms, permit water draining via the emergency drains. The tanks are double deck external floating roof concept. Main drain is not capable in draining storm intensities, and roof cannot cope with heavy water loads. The water that crosses the...
  7. dkf

    Water contamination in diesel - EFRT

    We have some diesel EFRT. Tropical storms increased precipitation peaks, and this results in water intake via emergency drains. This increases water dispersion in product, as it flows through the product in its way to the bottom layer. Water level is then measured and purged according to...
  8. dkf

    Hand operated valves- power kit?

    Pipelines still present a lot of hand operated valves. Did anyone solve this extenuating and tyring hand operation by a sort of practical "power kit"? Regards
  9. dkf

    Cavitation in pipeline by pass

    We have severe cavitation in by-pass loop that has the same configuration of an expansion loop. Main pipelines are 22" and 38", (2)by-passes are 6" dia each. Product is oil (API < 20)and we start by-passing at a 11Kgf/cm² pressure difference. Flow speed peaks 16 meters/second in the 6" sections...
  10. dkf

    Oil sample bottles - wash for reuse or discard?

    Hello, we have some laboratories that wash the glass bottles used to collect, store and perform oil analyses. Products are HC ranging from gasoline to crude oil. Some sites use simple machines using steam or detergents, and some sites wash them manually, using soap and brush. Quantities varies...
  11. dkf

    Domes for methanol tanks - venting as per API 650?

    We started a study to transform 200.000 barrels external floating roof oil tanks in fixed roof ( via aluminium dome )plus internal flating roof tank to contain methanol. Dome venting design is being conducted as per API 650 in Roof vents 3.10.8 Once methanol has a much wider explosivity range (...
  12. dkf

    Pipeline for benzene- special requirements?

    What would be special requirements for a benzene pipeline, say 6" dia and a few kilometers of extension, but in suburban area. Where could I find design and operation minimum safety requirements, as for leak monitoring system, emergency shut down valves etc... TIA DKF
  13. dkf

    Pump efficiency , old x new ?

    Did any of the leading centrifugal pump manufacturers that supplies the petroleum industry make any relevant pump developpment ( in pump design and digital control machining)that results in significant efficiency increase over the last four/ five decades? Looking at still running pump stations...
  14. dkf

    Floating roof draining system substitution

    Can anyone help providing exprienced oppinion in use of flexible hose ( composite hose 6" dia) for floating roof draining system. What is tendence today, repair or install new traditinal articulated arm draining system, or move on to new flexible hose? Pros and cons of the flexible hose? Tia dkf
  15. dkf

    beta foil

    In pipeline corrosion control process is beta foil practical and being used in parallel to other technologies? If so, what are pros & cons. TIA dkf
  16. dkf

    Greenhouse effect

    What materials other than glass could be used to build a greenhouse? If cost of materials were not an issue, what materials ( resins?)would give maximum thermal efficiency. TIA DKF
  17. dkf

    Corrosion detection technologies for pipelines?

    Could anyone advise on additional corrosion detection technologies available for HC pipeline reliability program. We are using visual inspection for external corrosion; ultrassonic pipe thickness periodic measurements on critical locations; pigging (ultrassonic and magnetic)for internal...
  18. dkf

    WRC-406, where to find?

    Does anyone know where can I obtain a copy of WRC-406( Proposed Rules for Determining Allowable Compressive Stresses for Cylinders, Spheres and Formed Heads ). TIA DKF
  19. dkf

    How to avoid vortex?

    What would be a practical way to avoid vortex formation at oil tank discharge other than restricting / decreasing discharge flow rate? This is anoperational problem we are facing when purging water ( 8 in purge pipe )from crude oil tanks. Thank for help
  20. dkf

    What does trunnion mean?

    I have in hands a local valve mfg catalog that claims &quot; full trunnion ball valve&quot;, from the valve assy' drawing you cannot say it can be repaired in line. Valve is built according API 6D, 12&quot; to be used in clear petroleum products pipeline. TIA dkf

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