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  1. zsa

    Least material condition applications in this drawing- help!

    This is the top level assembly drawing if that helps. Items 3 and 4 re of interest. These are support brackets( that also act as some sort oof pivot hinge i believe)
  2. zsa

    Least material condition applications in this drawing- help!

    3DDave, Yes it is a kind of hinge. My question about the 48+-1 still stands: The 48+-1 dimension is a feature of size and the FCF placed underneath it means that this planar featuree of size has a position tolerance? What does that look like physically? I guess one aspect of my question is...
  3. zsa

    Least material condition applications in this drawing- help!

    drawoh, agreed, but it is called out on the dimension 48+-1 which is a feature of size and that is what i am kind of struggling to grasp. this is a planar featuree of size so the position tolerance here would be on the center plane between the two faces that the dimensions lines point towards so...
  4. zsa

    Least material condition applications in this drawing- help!

    Hello! I am having a little bit of trouble trying to understand /decipher the least material condition and its affects on this diagram. the underlined width of 48+-1 with a LMC modifier,not sure what this means physically? the wdith of the part with a poisition tolerance is the tolerance for the...
  5. zsa

    GD&T- profile tolerance and basic dimension

    Burunduk, Our process requires a check sheet with some form of tangible measurements that operators can pull to determine if a part is suspected to be bad or if it isis OK. It is just a requirement of our automotive manufacturing process. They require a certain frequency of check like first...
  6. zsa

    GD&T- profile tolerance and basic dimension

    Thanks everyone for the reply! @jassco, I understand that the width is a feature of size that is not directly on the print but it is a basic dimension which is then driven by the profile callouts on each end- technically if I have a part that is good on all counts but the width is 722 that part...
  7. zsa

    GD&T- profile tolerance and basic dimension

    Attaching the print/drawing in question. In terms of the gd&t governing the basic dimensions for length and width of the box, I am not certain how to translate the gd&t into relatable plus minus tolerance for our shop floor. For the 718 basic dimension, I know that if only one end had the...
  8. zsa

    GD&T (ASME Y14.5/ISO) non cylindrical tolerance zone

    Hi Everyone, I could really use some help with something that I just came across. I am trying to determine what kind of functional gauge i would need for some parts that we make in my company and I am relatively new to the manufacturing industry but eager to learn(I know there are professionals...
  9. zsa

    Impact testing of annular plates vs bottom plates

    Hi all, I am currently working on an AST project where the MDMT is -20 C- due to which we cant use our usual go to material, A-36, for shell and annular plates unless its impact tested (understandably so). Long story short, after discussing with our client, all shell plates above ~14mm are...
  10. zsa

    material help: BS1501-151-28A

    Hello, My company has to verify the design of an old vessel for seismic loads. The material used in that vessel is BS 1501-151-28A, which, I understand, was used widely in the 70's but is not available anymore. Can anyone tell me what the ASTM equivalent to this material is? I read different...
  11. zsa

    Supported Tank Roof General Queries

    Thanks for the replies dig 1 and JStephen. dig1: why would wind pressure place the bottom flange under compression? shouldn't wind loading place the top flange under compression (for rafters under the roof plate)? JStephen: I understand that the top flange for a simply supported beam is under...
  12. zsa

    Supported Tank Roof General Queries

    Thanks for the reply, JStephen. Building on my previous questions, what design conditions might lead to a requirement of the roof plates themselves requiring stiffening a la 5.10.2.7? Also, if I have a rafter supported cone roof where the rafters are attached to the top of the shell, how do...
  13. zsa

    Supported Tank Roof General Queries

    Hi all, I have certain queries that I hope that the good people here will help clear out so that I may better understand 1) API 650 5.10.4.3 states that 'Rafters shall be designed for the dead load of the rafters and roof plates with the compression flange of the rafter considered as...
  14. zsa

    Shell course plate thickness

    Hello, Currently designing a tank in which the shell bottom course comes out to 10 mm and all other courses are 6 mm. Can I use a 10 mm plate for the bottom course and directly use 6 mm for the other courses, or is it a better engineering practice from a fabrication and operation point of...
  15. zsa

    Vessel cleat/clip design

    Thank for the input guys, I will pass the message on to him. SnTMan- he is interested in both. Much appreciated
  16. zsa

    Vessel cleat/clip design

    Hi, A colleague of mine is designing a pressure vessel and came across the following design concern: He needs to model a support for a load of 60kN and needs to design a vessel clip/cleat for attachment. So the question is this, is there any standard or software pertaining to this issue (he...
  17. zsa

    Storage tank with compartments

    Thanks for the input guys. I just checked with my supervisor and he told me the client wants to store methanol in all three but he wants to have the compartments based on a bad experience in the past where a low grade/bad batch was decanted into the tank which already had some product and the...
  18. zsa

    Storage tank with compartments

    Hey all, Got a design query that I need your input on. A client wants us to design an atmospheric storage tank (for methanol) with compartments. He provided us with a picture of what he wants, a copy of which I'm attaching for your reference. My question is this- for the compartment 'walls' is...
  19. zsa

    Pipeline alignment sheets

    fel3, Truly appreciate the detailed reply. Appreciate the input; I shall look into the 'horizontal controls' and bring it to my supervisor's notice LI: I realize that it would have better served my purpose to give some background in the original post. I appreciate where you're coming from...
  20. zsa

    Pipeline alignment sheets

    Thanks for the reply guys. To shed some light on the situation, I am a fresh design engineer and am being made to 'rotate' through different departments. I am due to start pipeline design with one of the senior engineers but I wanted to get a jump on that and start from now- this is why I posted...

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