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  • Users: TomoB
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  1. TomoB

    Sockolet Nozzle - FE cylindrical shell model

    Hello, I need to verify external loads from the connected piping on the 1" XS nozzle that is connected to 4" XS pipe via 1" Cl.3000 Sockolet (MSS SP 97). I am using rohr2fesu, which is a cylindrical shell FE tool for piping elements. Does anybody have experience and an advice on what approach...
  2. TomoB

    Shear Lugs (Axial Stoppers) on Pipelines

    Thanks, I will probably still have to go with these ones as the support concept is already made this way and the project is in the late phase. The other limitation will be if the Pipe shoe supplier will confirm this loads. One info - LISEGA provides pipe shoes with trunnion insert for axial...
  3. TomoB

    Shear Lugs (Axial Stoppers) on Pipelines

    @LittleInch I did not invent this, this is a concept that was used on the projects before for HP Steam systems under PED III category. So this was also approved by the Notified Body in the past. Other than if you take a look at many spring manufacturers the vertical spring hangers can be...
  4. TomoB

    Shear Lugs (Axial Stoppers) on Pipelines

    Hello, I need to check the shear lugs (axial stoppers) on pipelines with respect to the loads that were calculated in the stress analysis. I came across a project where Finite Element Analysis was used for these components. But is this really necessary? 🤔 What is your approach? Do you rely on...
  5. TomoB

    ASME B16.9 reducer thickness

    Thank you all for your responses, and apologies for the delayed reply. I am conducting a static analysis, not an FE analysis, so I do not need to delve into extensive details. Thank you for the additional information—it will certainly be useful in other situations. The confusion arose because...
  6. TomoB

    Modeling fittings acc. to ASME B16.11

    Thanks!
  7. TomoB

    ASME B16.9 reducer thickness

    Thank you for your responses. Measuring or weighing the component is not an option, sditionally, my question is more general in nature. For EN standards, the dimensions are clearly defined. In contrast, ASME B16.9 specifies, broadly speaking, that the reducer must be as strong as the...
  8. TomoB

    Modeling fittings acc. to ASME B16.11

    Hello, I am seeking advice on the best approach to model pipelines that incorporate ASME B16.11 fittings. These fittings appear to be quite stiff, and my concern is that I might model them as too flexible. My current approach would be to simplify the model by using the minimum wall thickness...
  9. TomoB

    ASME B16.9 reducer thickness

    Hello, I am performing a pipe stress analysis for a system and have encountered some confusion regarding the wall thickness of reducers. After reviewing the ASME B16.9 standard, I found that no specific wall thickness is defined for reducers. I also searched through the forum and learned that...
  10. TomoB

    Pipe shoe thermal displacement/movement - limitations

    1503-44 Once again thank you for answering, but we are missing the goal of this thread. I already did analysis of the system regarding the locations I have to restrain. I understand what my goals are as a pipe stress engineer. My questions are more related to the execution and feasibility of the...
  11. TomoB

    Pipe shoe thermal displacement/movement - limitations

    Hello, thank you all for the advices. Sorry for not answering, I got sick and had to take some rest. :) What was the diameter of the pipelines? KevinNZ - Thank you for the guide tabs advice, I will use them where necessary. As for the rotating anchor my question was more related to the design...
  12. TomoB

    Pipe shoe thermal displacement/movement - limitations

    Hello everyone, I'm currently working on a piping system of a live steam pipeline (around 500 m long) which serves as a main feed for turbine: DN200, s = 12.5 mm; T = 450°C; p = 68 bar(g). I am doing a static analysis with ROHR2 software. I have done numerous analysis for chemical facilities...
  13. TomoB

    EN 13480-3; allowable stress determination acc. to 5.2.2-1

    Hello, I have encountered a problem when calculating the allowable stresses for bolts made of A2-70 material. In a formula 5.2.2-1 of EN 13480-3 it is stated to use the second formula if Rm,t is available...
  14. TomoB

    Nozzle 2D shell analysis acc. to EN 13445-3

    I wouldn't say it is the wrong tool. The software is designed for this type of problems and it is common to use shell theory for this verifications. I think it is more the question of an interpretation, knowledge and experience of a 13445-3 standard and of shell theory for this type of...
  15. TomoB

    Nozzle 2D shell analysis acc. to EN 13445-3

    Thanks for the answer. Unfortunately, the software is very limited. This is an add-on to the base software which is intended for the pipe stress analysis. It is mostly used for piping elements - circular, elliptic and oval shapes using shell elements - only shell elements.
  16. TomoB

    Nozzle 2D shell analysis acc. to EN 13445-3

    Hello all, I have a trouble assessing the FEA results of a set-in nozzle on a dished end. Design pressure of a vessel p = 40 atu = 40,53 bar; temperature T = 100°C. Due to changed pipe routing the existing vessel's nozzle should be checked against the loads from piping, but high stresses due...
  17. TomoB

    Pipe supports / shoes / clamps - degrees of freedom for stress analysis

    Thank you all for your answers, they were helpful. -I agree, so can we say that: 1) anchor is a full restriction support and 2)fixed point is partially restrained support (moments free)? -This is basically the answer I was looking for. Thank you! -I agree, my mistake.
  18. TomoB

    Pipe supports / shoes / clamps - degrees of freedom for stress analysis

    I don't know, maybe my question was not clear enough. I never said all the pipe shoes are anchored. I don't see how that would be possible (T>300°C). It is not the question of do I need to allow some movement of the anchor point, it is not about movements at all - it's about rotations and...
  19. TomoB

    Pipe supports / shoes / clamps - degrees of freedom for stress analysis

    Hello, Since the start of my career as a pipe stress engineer I can't crystalize the matter of whenever does the pipe shoe restricts rotations or not (and which directions). 1) Two major industry companies for which I have worked have guidelines that clearly points out for standard fix points...

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