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  • Users: shvet
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  1. shvet

    L-L interface control

    Dear forummembers Is here anybody familiar with such L-L level control scheme? Is this method workable or not?
  2. shvet

    "My forums" ribbon

    Please somebody explain how to manage "My forums" ribbon to the right of the forums list.
  3. shvet

    Forum policy disappeared

    Where has the forum policy been moved to? How will the newcomers know what is ok and what is not?
  4. shvet

    Forummembers losses

    Please share statistics how much the community activity has been lost since the new forum was launched. % of posted / watched / commented
  5. shvet

    Ceramic balls diameter

    Dear forummembers, please advise a rule of thumb or comment the design or a reactor below. We have a reactor where catalyst bed is supported by ceramic balls bed: - catalyst shape is cilinders OD=6mm, H=4mm - support bed are 2 layers of ceramic balls OD=6&19mm What do you think? Are 6mm balls...
  6. shvet

    API 620 term "design external pressure"

    Dear forummembers Please help with datasheet. We have a datasheet for API 620 storage tank provided by a licensor where it is written: The problem is with 0.7584 kPag. I do not understand how pressure below atmospheric can be expressed as positive gauge pressure. Is it a misprint? Should it...
  7. shvet

    ISO tank-containers melting for unloading

    Dear, forummembers We need your advise regarding to unloading of trucks and tank-containers. Benzene is delivered in semi-trailers and 20ft tanks-containers. We need to unload those during winter period. Those are equipped with heating coils but there is a possibility some of these will have...
  8. shvet

    Gate valve + TRV

    Dear forummembers I have a storage facility at engineering stage. Gate valves are used at storage tanks, piping racks, and similar. We have long distance piping segments prone to thermal overpressure relief. I would like to avoid TRV and implement common gate valves protected with built-in TRV...
  9. shvet

    Inert gas blanketing and inhibitor

    Dear forummembers Does anyone have experience in the issue below? If so please share. We have chemicals, let it be aniline, being stored in 1k m3 tanks under N2 blanket. Chemicals are inhibitted by an antioxidant like butylhydroxytoluene, hydroquinone, and para-methoxyphenol. The question is...
  10. shvet

    API 686 temporary strainers

    Dear forummembers Please comment For typical pumps 30μm, for special pumps 75-150μm? Misprint? May be vice versa - 30μm for special and 75-150μm for typical?
  11. shvet

    AI for a library

    Dear forummembers I have a large library of standards, practices, articles, books, reports and similar which I use everyday. The problem is the library has been growing up to 100+ GB and 40+k files and keeps evolving. Eventually it became hard to find info/data on demand as one is remembering...
  12. shvet

    Air moisture absorption by chemicals

    Dear forummembers Please share knowledge/experience We have chemicals [let's say 99.9% methanol]. We unload these from car tanks to storage tanks and from storage tanks to a tanker. What if we store and load/unload these not using inert gas. E.g.: - inbreath of car tanks by ambient air -...
  13. shvet

    High-sulfur naphtha

    Dear forummembers Please advise We have large amount of high-sulfur naphtha, let's say 2'000 ppmw S and 2'000 MT per month. Ar there end-users using such stock as a raw material? I do not know - solvent, vulcanazing agent, odorizing additive? I am interested in industry or process or similar...
  14. shvet

    Gasoline blending in tanker

    Hello, forum Please advise We have the tanker fleet carrying the refinery products. Now we are forced to provide blending onshore and we are seeking options to do this on board. For example gasoline - is there a practice loading a tanker with the gasoline components and provide a precise...
  15. shvet

    Overtension of an asbestos gasket

    Hello, forum I have a packed rectification column 2.2x25m, operating at vacuum 30kPaa@200°C, installed outdoor, no roof, no windshield, continious operation >8k h/y. An engineering contractor has proposed no access holes and shell devided by flanges, spiral-wound gaskets for...
  16. shvet

    International language camp

    Hello, forum I have not found a proper thread for such issues. Please advise or guide me where I should move this post. I am looking for a feedback from an experienced person has gone through this road before. I have a kid 8 years old and I am seeking for a place for spending 1-2 months a...
  17. shvet

    Large capacity O2 tank

    Good day, forum Is here someone having experience with cryo industry? Is it normal to store liquid O2 in a large cryo tank let's say 2'000 cubic meters? Volume 100m3 is definitely ok, but 2'000m3... Can someone share a link to a standard/practice where issues like this are discussed? Please...
  18. shvet

    Outbreathing of nitrobenzine, aniline and similar

    Hello forum Someone having relevant experience - please advise We are in engineering stage of a tank farm. N-methylaniline, aniline, nitrobenzene, benzene and methanol are stored in nitrogen blanketed low pressure tanks. Preliminary numbers are 4x1'000 m3 tanks, every tank is designed for...
  19. shvet

    Outbreathing of nitrobenzene, aniline and similar

    Hello forum Someone having relevant experience - please advise We are in engineering stage of a tank farm. N-methylaniline, aniline, nitrobenzene, benzene and methanol are stored in nitrogen blanketed low pressure tanks. Preliminary numbers are 4x1'000 m3 tanks, every tank is designed for...
  20. shvet

    Void in tables

    Hello, forum Please help me in understanding of this issue. One often sees voids in tables. This situation mostly concerns US-issued literature. For example see the extract from NFPA See - Ester of Acetic Acid and tBuOH has not Zone Group and MESG both while Acrolein has Zone Group and has...

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