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    Discussion in 'Industrial design' started by francesco.ciani88, Jul 11, 2015.

    1. francesco.ciani88

      francesco.ciani88 New Member

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      Hi all,
      I have just started to work in firefighting company.
      In my MTOs, I have submitted simplified definition of the material. Unfortunately someone else blamed my for the lack of precision in this definition. Can someone help to understand in what I am wrong?
      These are some example in what I would like to be helped:
      1) 3'' Flange WN, A 105, 150# RF, SCH 40
      First of all my bosses convinced me that in flanges has to be indicated the schedule too. Is that right? ( I accepted this, but with some reservation)
      What else should I add too in order to make a complete description?
      2)3'' Gasket 150# RF, 32 c 28
      What else should I add too in order to make a complete description?
      3) 3 X 1/2 Thredolet, A 105
      First of all is it needed to specify "3x"
      Should I add the class (e.g #3000)
      4) 2 1/2''x 1 1/2 conc. SWG. A 234 WPB
      Someone commented to this that all swages should be A106. Is that right? Someone can explain me why?
      5) 1''x 1 1/2'' welded reducing tee with threaded oulted.
      My bosses told me that this material does not exist. How can I know if this material exist or not?
      6)2 1/2'' flange threade (male) 150# RF
      My bosses told me that this material does not exist. How can I know if this material exist or not? Can threaded flanges be male? Are there limitation for threaded Flanges?

      Thanks a lot guys. It is not a lot of time that I work in this field. Any comment that can help me (poor intern :)) will be accepted and I will be gratefull
       
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    3. JPfalt

      JPfalt Member

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      start by finding out if they have a preferred material supplier and work from the supplier catalog or website. If no preferred supplier, search for the components on line and identify the component, supplier, part number and the full specification for each part. For the gasket, for instance, I wasn't clear what the gasket composition was supposed to be.
       
    4. srdfmc

      srdfmc Well-Known Member

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      Schedule Yes. You'd need it for calculation (see norm)

      Try to stick to the norm. It's rather complete. This will ensure also a coherent design,at least. There are items that can't be mixed for example.

      Piping design is a world apart. Many in the profession think that it has become a prerogative for them and are reluctant to share the how and why's. Innovation has a still a lot to bring-in.
       

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