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  1. mectarek

    FOAM DAM hight

    LittleInch thank you for you response. here is the photo of the secondary seals. what we understood from the NFPA and API 650 mention of ''Burnout panels'' is those added black panels in the secodary seal that woul burn in case of fire, but we are not sur about it
  2. mectarek

    Foam Dam NFPA 11

    Hello everyone, I want to confirm an information about the hight of the foam dam. We disagreed with a contractor about the interpretation of the following statement in the designe criteria: '' Dam height shall be at least 2 in. (51 mm) higher than any burnout panels in metal secondary seals''...
  3. mectarek

    FOAM DAM hight

    Hello everyone, I want to confirm an information about the hight of the foam dam. We disagreed with a contractor about the interpretation of the following statement in the designe criteria: '' Dam height shall be at least 2 in. (51 mm) higher than any burnout panels in metal secondary seals''...
  4. mectarek

    surface roughness and cleaness

    I want to understand the downsides of the amplitude on the surface being too rough and the relationship between surface roughness and the degree of cleanness (Sa2, Sa2.5,... SA3). From what I know, the peaks of metal will be exposed through the primary coat, but what if we thikens the primary a...
  5. mectarek

    blasting profile before primer painting

    I want to understand the downsides of the amplitude on the surface being too rough and the relationship between surface roughness and the degree of cleanness (Sa2, Sa2.5,... SA3). Thank you in advance.
  6. mectarek

    tank bottom repair

    thank you all, your comments were very helpful
  7. mectarek

    tank bottom repair

    Hello All, Looking at the method of using patch repair plates on the tank Bottom in accordance with API653 does API 653 states any maximum size of patch plates? what to do if you find several adjacent damaged plates on the bottom of the tank? Can you cover a whole part of the bottom with new...
  8. mectarek

    Fire-water piping network

    Hi, I want to know which standards are used to design the fire-water protection piping network in an oil storage farm. Thanks
  9. mectarek

    regenerative desiccant dryers sizing

    I need information on regenerative desiccant dryers sizing. I couldn't find a book that talk about this subject. So please help me if you know any book!
  10. mectarek

    shell opening

    Thank you for your great answers
  11. mectarek

    shell opening

    we want to open a window or a door in the shell of a 220 ft diameter oil storage tank. what do the standards ( API650, API653) say about it and in what sections I can find it. the door si about a 6.5 by 6.5 ft and we want to open it so we can repair the tank's bottom.
  12. mectarek

    Corrosion Inhibitors

    I need to know the most important specifications and caracteristics of corrosion inhibitors that i need to demand from a contractor who is providing them to us. we need the inhibitors to use them in hydrostatic tests for oil storage tanks.
  13. mectarek

    shell reparation

    MJCronin, the Tank is not very old. It was built in 2002. the crude oil is Sahara Blend with a API gravity of 45° yes there was a protective inner coating and this repair is due to coating failure. the hole tank bottom is corroded and we are consedering a seconde bottom option we are planning...
  14. mectarek

    shell reparation

    thanks IFRS, and pardon my bad english
  15. mectarek

    shell reparation

    chicopee, exactly I'm not talking about the bottom ring. i'm asking about the shell reparation
  16. mectarek

    shell reparation

    we have a crude oil storage tank that has a very damaged 1st shell. Pittings are Spread on most of the underside area of the 1st shell plates( about 40 cm from the bottom). the thickness loss is in some places about 66% of the original thickness. the shell original thikness is 22 mm ( 0.866...
  17. mectarek

    chasing flamable gases before welding

    After cleaning an oil storage tank for reparation..what's the best way to chase the residual flamable gases underneath the tank bottom to avoid problems when the welding starts?.
  18. mectarek

    oil storage tanks repair suggestions

    1. Is using products like Belzona epoxy effective for repairing corroded areas on the bottom of an oil storage tank. Is that allowed by the API 653.. 2.what's the limit where it is better to put a new bottom than repairing the old one by welded patches?
  19. mectarek

    water injection

    what's the best way to detect leaks after opening a petroleum storage tank for reparation. in my work place we inject water under the tank bottom. What does API 653 says about that? and is using Helium better?
  20. mectarek

    Storage tank rehabilitation

    Hi, I'm a mechanical engineer and I moved recently to storage tank departement.. I need a detailed description of the correct procedures to completely rehabilitate an API storage tank according to the API 653

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