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  1. cornemo

    API 650 app P figure P.4a logaritmic scale

    I have a question regarding API 650 appendix P figures P.4a and P.4b. These figures tend to be log-log graphs based on the numeric scale given on both axis. However both axis in figure P.4a have a numbered scale which is logaritmic, but has intermediate scales which are linear. How to deal...
  2. cornemo

    API650 appendix P wall thickness for nozzle load verification

    Dear, in API650 appendix P all formulas refer to t, which is the shell thickness at the opening connection. To calculate the stiffness of the connection, the code differentiates between nozzles with reinforcement on shell (figures P.2a to P.2f) or reinforcement in the nozzle neck (figures P.2g...
  3. cornemo

    Intermediate wind girder not continuous welded

    Dear all, an existing tank has to be equipped with an intermediate wind girder. Tank cooling is however provided by a water free flow from the top of the fixed cone roof. If we want to attach an intermediate wind girder without having to add a sprinker ring for cooling just underneath the new...
  4. cornemo

    Storage tank defect spray distance

    Dear, I don't exactly know where to post this question, but as it actually is a fluid flow issue, I thought I post it here. I have to calculate the spray distance resulting from a small defect (say 10 or 20 mm) in a storage tank shell. My first assumption was to calculate the outlet velocity...
  5. cornemo

    Storage tank defect spray distance

    Dear, I don't know if I should ask this question here, or in the proccess engineering forum, but let me start by asking it here. I have to calculate the spray distance resulting from a small defect (say 10 or 20 mm) in a storage tank shell. My first assumption was to calculate the outlet...
  6. cornemo

    U-bolt bending stress

    Dear, a 16" pipe (heavy wall thickness) is supported on a beam and held in place using a U-bolt. Normally I design the U-bolt based on tensile stress due to possible upward force and shear stress based on lateral force. For easy calculation I divide the pipe force by 2 to get the force for each...
  7. cornemo

    Reverse flange and opening reinforcement

    Dear all, In a lot of situations a reverse flange is also acting as opening reinforcement, for example a 48" head with a 10" reverse flange in the top. I tried to find a reference in ASME VIII how to handle such a situation. The flange will see stresses due to the fact that is acts as opening...
  8. cornemo

    Titanium pressure vessel according EN code?

    I have to design a titanium pressure vessel (ASTM B-338 or equivalent), but the client insists that it must be designed according to a European code. EN 13445 is the European code for unfired pressure vessels, but is only applicable to vessels manufactured from steels, spheroidal graphite cast...
  9. cornemo

    ASME VIII stub-end calculation

    Hi all, I have a question concerning the calculation of lap-joint flanges according to ASME VIII div. 1 appendix 2. Concerning the loose flange the code is very clear and tells to calculate it as a loose flange with G being the center of the contact between loose ring and stub end (image 1...
  10. cornemo

    Carbon steel pipe flange material 11 416.1 ??

    I have received a test report from a carbon steel flange on which the material is named 11 416.1 . I don't know this material and google gave me some hits on flanges/equipement from eastern europe. So I guess it's a russian standard or something like that. Does any of you know a european (or...
  11. cornemo

    Must calculation be done by manufacturer/contractor?

    I'm currently in a discussion with a terminal owner who has been told that the (flow) calculations for the fire fighting and foam systems have to be done by the manufacturer/supplier(like Tyco). He says that calculations made by an independent engineering company are not valid unless they are...
  12. cornemo

    ASME VIII div 2 2007 vs 2004 edition comparison index

    Is there a good reference comparison index somewhere that can be used to see what item moved where during the great rewrite of the ASME VIII div 2 code for the 2007 version? I'm currently dealing with some people with other versions of the code and I want to have some comparison for them between...
  13. cornemo

    cup tank (tank in tank) design code

    I have to design a cup tank (a tank within a tank, the inner is the storage container, the outer is to capture the medium in case of leakage of the inner tank). In design codes for cylindrical storage tanks like API650 and EN 14015 a double-bottom is adressed briefly. However a cup tank is...
  14. cornemo

    ASME VIII flange design bolt strength (with Appendix S)

    Dear all, a general question. When designing a flange according ASME VIII the bolt forces are calculated depending on pressure and gasket factors. This way a bending moment in the flange is calculated which is used to design the flange. This force can also be used to size the bolts used as the...
  15. cornemo

    ASME max. allowable bolt stress 50% Sy ?

    Dear all, I'm doing a calculation for a modified flange according to ASME VIII div 2 at 310 bar and 300 degr. C (with PVElite for those that are interested). The bolt material used is the European 34CrNiMo6 (acc. EN-10269). What I've done is the following. - I've modelled the flange as in...
  16. cornemo

    Storage tank square manhole calculation method

    Dear all, a client came to me with a question regarding a storage tank which he wants to equipe with a square (1100x1100 mm) manhole in the shell for which he needs a calculation. I have checked different codes (API650, EN 14015, EN 13445 etc) but couldn't find a calculation method for a...
  17. cornemo

    A790 S31803 alternative for ASME VIII div 2 @ 600 F

    I hope someone here can help me out. I'm doing a calculation for a little vessel according to ASME VIII div. 2. The design temperature is 316 degr C (600 degr. F.). The prescribed seamless pipe material is A790 S31803. This material however may not be used on the design temperature. Can anybody...
  18. cornemo

    EN code concerning DIN / ASME fittings

    Hi all, this is my first post in this forum. So please tell me if I'm posting this in the wrong section. Does anybody know if there is a EN (european) code representing ASME or DIN fittings? I know there is the EN-1092 which represents DIN flanges, and EN-1759 which represents ASME B16.5...

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