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  1. LearningENG-

    Why are stiffeners chamfered?

    Hi folks, This might be an obvious question but it has been in my mind for a while. Why are some of the stiffeners on a flat face of a pressure chamber chamfered? See pictures attached. I couldn't justify why they are made that way...
  2. LearningENG-

    FEA vs Code/Roark calculation?

    Hi I’m trying to verify in FEA my hand calculation of a rectangular chamber subjected to external pressure. It's a chamber with rectangular cross section (see attached picture) whose inner dim. are 22"*24"*57.25". It has equal wall thickness of 0.75". The material is Aluminum 6061 T6 with a...
  3. LearningENG-

    Noncircular vessel vacuum chamber ligament efficiency

    Hi all, I'm now at the stage of calculating ligament efficiencies in designing my chamber here thread794-463774. I have three types of plates with holes to which CF nipple tubes will be welded on. Type one is a plate with one row of 4 uniformly distributed 6" holes on the centre line of the...
  4. LearningENG-

    ASME VII Div.1 Noncircular cross section chamber with openings

    Hi all, Edited: The chamber is roughly 24"X24"X60". It's for insulation of a cryostat but the temperature of the chamber itself is at room temperature. The potential material could be Aluminum 6061 T6 or SS ANSI 304. The reason why I consider Aluminum is that it might be cheaper than a...
  5. LearningENG-

    ASME VIII Div 1 Procedure for noncircular cross section vacuum chamber subjected to external load

    Hi All, I'm currently working on designing a vacuum chamber as a insulation for a cryostat. Due to design requirements, at least one side of the chamber should be flat so I can't choose a cylindrical chamber. I'm hoping to design the chamber as per Figure 13-2(a) (3) or a "D" shaped chamber...
  6. LearningENG-

    Welding efficiency E ASME BPVC.VIII.1-2019

    Hi People! I'm new to the forum please excuse me if the answer of my question is too obvious. I'm working on designing a vacuum chamber and I'm currently comparing between a D-shaped and rectangular chamber, made of AL 6061 T6. I did most of the calculations and I have the value of the total...

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