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  • Users: carthago
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  1. carthago

    AXISYMMETRIC boundary conditions?

    What is the best practice to model a cylindrical storage tank , with annular plate bolted to the foundation. I want to model use the AXISYMMETRIC capabilities of ANSYS . my issues/ questions are about: Boundary conditions Fixation to the ground A small model in ANSY workbench would be very...
  2. carthago

    Which software has been used for API 579 and ASME VIII

    Which software has been used for ? 1/- API 579 ( the part 2 with the examples) and 2/-ASME VIII ( he 3 booklets with the examples of division one and division 2) was it simply a text editor ? and the calculations have been made behind the "curtens" ? or is it a formal software dedicated to...
  3. carthago

    FFS-1 = API 579 latest edition (2016)

    I understood that a new edition (June 2016) has been issued ? What are the latest changes ? topics ? (e.g. compared to the previous edition ). Are they additions ? and or changes or amendments ? or even some re-writing of course the introduction in the new edition gives a very quick...
  4. carthago

    supported cone roof

    case: Conical cone roof with supporting structure (rafters connected to in inner ring, no column). Due to corrosive product, vapor inside the tank above the liquid level, the rafter are located OUTSIDE the roof. Rafter are welded to the roof. Question: how is the outer part of the rafter shall...
  5. carthago

    Pontoon roof / deck for a floating roof

    see thread809-316272 there is a book "Guide to Storage Tanks and Equipment" the authors are Bob Langer and Bob Long , you can get it from Amazone or from this site: http://www.ais-engineering-books.com/books/pc/viewPrd.asp?idproduct=851&idcategory=6#details this book contains an example on...
  6. carthago

    EN and DIN materials of piping fittings and forgings ?

    What are the equivalent materials in EN , DIN of A 106 gr B A 333 gr. 6 A 105 A 350 LFE A 234 WPB .. What are the standard wall thickness ? Thanks a lot take care and thanks
  7. carthago

    questions regarding repair =annular ring of a new bottom

    we are intending to repare an API 650 storage tank. The old tank bottom is leaking and the owner wants to add a second new bottom located say 150 mm from the old one. The old bottom will be lined , a concrete or sand will fill in the space between the 2 bottoms. we will add also means at this...
  8. carthago

    ASME B31.8 question

    What are the requirements in B31.8 for API 5L materials , (say GRADE 65 for instance) regarding their use at low temperatures ( minus 40 Celsius) Certifications ? Required Charpy tests ? Minimum values for Charpy ?? Thanks
  9. carthago

    FLARES

    Flares, I am aware that hey are specific standards for that. API 537 and ASME STS-1. questions: Are flares considered as pressure vessels? Which design pressure shall be used ? Do we have always to hydrotest flares even when they are pressureless? Which hydrotest shall be be used then ? Which...
  10. carthago

    API 650 - When to use anchor bolts ?

    API 650 tanks with earthquake and wind I never understood correctly when to use anchor bolts or not ? Of course I' d rather avoid them ! Which criteria are used to lnow of anchor bolt are required or not ? Check if bolt tensioning is positive ? Check if stress with sismic are high at annular...
  11. carthago

    Steels= Russian equivalent to ASTM and SA materials

    ..Could someone help with info., software, tables, site, etc giving equivalence of russian materials for pressure vessels and piping (plates piping,forgings and bolting...filler materials) I am interested in ASTM and or European materials. By equivalent I mean mechanical: strength, resilience(...
  12. carthago

    Caesar II in Russian Federation ??

    For Russian Federation Countries Is Caesar II used in Russia for projects within Russia. Which russian Code is equivalent to B31.3 ? Is B31.3 accepted in Russia ? Should CAESAR be certified first in Russia / Kazakstan and by which authority? Which CAESAR version is certified and accepted...
  13. carthago

    Language problem...please help

    I am France for a couple of weeks (for work !!), the computer I am using has excel the excel commando's an help in French.. How can I change that into english ??
  14. carthago

    Question about ASME section I

    .Boilers Could someone help and give the formula wall thickness for an ellipsoidal head ( 2:1). I was expecting something like t =( P*L) / [ 2*S -0.2*P]) with L = 0.9*D D= Boiler diameter corroded .......I started doubting when I saw THE FORMULA T = (5*P*L) /( 4*8*S)
  15. carthago

    Storage tank wall scanning

    We need to do some inspection.work on a couple of existing API 650 storage tanks. Doing hand measurements is time consuming and endless... Do you you good names and adresses of companies selling these automatic crawlers with probes for scanning and mapping tank wall thicknesses. We are...
  16. carthago

    Assessing annular plate thickness of an old angle.

    Could you please give more light on annular plate thickness. I am actually looking for a clearer interpretation of API 653. I mean assuming the remaining tank life is known or fixed. And the annular plate thickness is less the the original thickness less corrosion allowance...HOW TO PROCEED...
  17. carthago

    API 650 - Max internal pressure above liqu

    I need some help, I am a bit lost , please....I shall explain: I always though that for API 650 the maximum internal pressure is 2.5 inches water column or 25 psi!! ( by the way is it GAGE or ABSOLUTE ??). 1/-Is this limit of 2.5" water column correct ? If pressure is a higher then above One...
  18. carthago

    API 579 fitness for service

    API 579 fitnes for service. This is becoming an important standard ,.. I believe it will replace ( at least partly) API 510, 570 and 653 !! I came a cross a new edition (2007). I wonder why on the API site= there was no draft norcomments or similar about this new revision ??. Have I mised...
  19. carthago

    Test pressure = which ( Sa / S) ???

    Assume we have a vessel with non standard bolted flanges ( girth ones). Thus the vessel has heads, shells, nozzles, flanges and bolts. The design pressure is is (P) each item has its own (MAWP) for each item the allowable stresses per Code: Sa (ambient) and S ( design) are determined and...
  20. carthago

    stiffening rings for API 650 Tanks

    Secondary stiffening rings acc. API 650: Assume that based on D, course heights , thickness, wind speed,.. on calculates: 1/ height of transformed shell= H_transf 2/ H_unstiffened =the height of the Unstiffened shell lets note: n < (H_trans : H_usntiffened ) < (n+1)...

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