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Thanks Twoballcane The physics? I expect to have deflection but it is not easy to propose a model that is acceptable by all parties and on which no one at the end can says...ohh! this is not realistic. I personally consider that a model constituted by a two halves cylinder of different...

Thanks for all this input. I carried on some further investigation on their basis. I give evidence to the following hoping to be able to clarify around what is coming from you: -One of model is bending in horizontal plane direction -X, this might be probably due to the different rigidity on...

Thank rb1957 / Thank mgage / Thank johnhors -The second contractor when runs the model find the worst deflection (14 mm) with the pressure only load case (other external loads seems are acting as stabilizing the body). The model looks sensible to any load variation and reacts as expected...

Can anyone give me some input on FEA with ANSYS to fix a potential case of conflict I'm in between? From a Contractor my Company got an equipment, a quite slender header with a complicate geometry. The Contractor is responsible both for design and construction. The equipment is intended for a...

Thanks Ibrahim Geometry in between the nozzles and nipples is complicate and looks to be a possible weak point (this is the reason for FEA and to evaluate external loads effects). With a calculation by formula Longitudinal and Diagonal efficiency for the ligaments was considered as per Fig...

First of all my thanks for your kind replies and sorry for being disappeared for few days but, your replies gave me a lot to think about and were pushing to go deep (I try to do) before to return on the thread. The example of a "double thicknes" pipe as proposed by Prex is fine because well...

I feel necesary to add one explanation more to my thread. When I say: "the presence of the holes+nipples&nozzles, even with pressure only, may deflect the header in the horizontal plane (X direction whether p.ive or n.ive) not having it a symmetric behavior"; I'm thinking to a sort of bending...

Dear all I'm discussing with a supplier about this fact: in presence of a very slender and light thickness pipe header 8" O.D., thk 8.18 mm, 3.8 m length,with four 6" nozzles, designed at 42 bar (g)/170 °C, mat. SB 425 UNS 08825 (See the link to understand geometry) I'm asking for the...

After few days here my conclusion. Reciprocating compressor not present, fortunately. Non compliance to ISO 13706 as follow: 7.1.1.4 2"sagging an meshing" / 7.1.1.5 "hold down member" / 7.1.1.8 "air seal" / 7.1.6.1.3 non corect hold down members lead to uncontrolled load for tube / fretting...

Very kind from you to dedicate time in replying me Decision and responsibility is on my desck 4Pipes, I know, and I'm seriously concerned: people's life is unique. I take in my hand your suggestion, gr2vessel and 4Pipes. it's a nice program for the week end. I will return back to ASME and ISO...

Hi Gents I have in front of me n°6 fin fan cooler ( three bays / two per bay ) in sour service (high H2S contents), design 120 bars / 115°C, UNS N08825 ASME VIII div.2. Four pass with return U bends, 1"1/2 15 BGW (1.8 mm), at the fin tube hedges. Very critical service. Bundles are already...