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  1. tph216

    Wood Pellets - Saturated bulk weight estimation

    Just trying to determine a structural fault-case load action, based on a scenario where industrial wood pellets become dowsed with sprinkler water, and become saturated. I have the following information, but am struggling to find much else: * Bulk Density is stated as 650 kg/m^3 * Porosity...
  2. tph216

    Wood pellets - saturated density

    Just trying to determine a structural fault-case load action, based on a scenario where industrial wood pellets become dowsed with sprinkler water, and become saturated. I have the following information, but am struggling to find much else: * Bulk Density is stated as 650 kg/m^3 * Porosity...
  3. tph216

    Pneumatic Tests: Stored Energy & Safe Distances

    Hi, I have a very low pressure vessel which has been designed to BS PD5500. It operates in the vertical orientation in the range -100 to +200mbar internal pressure, and is approximately 6m ID by 15m high with conical ends. It is really more of a process vessel, and operates between 400-550...
  4. tph216

    UK self-build residential property

    Hi, If I were looking to design a house in the UK, what codes & standards would the design need to reference in order for it to comply with regulations? I'm a mechanical engineer, and considering whether undertaking the bulk of design work myself would be worthwhile, bringing in a structural...
  5. tph216

    Inventor piping / plant design.

    Hi, I am attempting to use Inventor to model a plant design, including several piping systems. I cannot fathom out how to create piping headers without going down a long-winded route which feels a bit botched, to me. So, my top-level assembly is -500, the assembly containing my piping runs is...
  6. tph216

    Inventor general usability

    Hi, I have come onto using Inventor at a clients request (from Solidworks & NX), and am finding myself astounded by the shoddiness of the way in which Inventor does various things. I am here to check whether this is just me using the program wrong, or whether I am actually operating it...
  7. tph216

    Screwjack synchronising

    Hi, I have a set up of a beam over a rolling drum 15m long. The beam needs to move up and down (approx 80mm), and fore-aft (+/- 50mm). The beam ends are mounted onto an end bracket with vertical guide rails allowing the vertical motion. The beam end brackets then rest on two moving end beds...
  8. tph216

    Low rpm zero-backlash clutch coupling (on-off action)

    Hi, I'm looking for a small clutch coupling to sit at a break in a shaft, and give basically on-off action by electrical actuation. I'd specified a Warner SFC-250 initially, but now find that it doesn't quite have the torque rating I need, and is not ideal for low rpm's. Some further details...
  9. tph216

    Illustrations in Mathcad

    Anyone do much picture inserting into mathcad? I use it quite often for calculation reports, and am inserting more and more images of late to illustrate various parts of the report. Anyway, I prepare the images elsewhere as JPEG's, making sure to get their filesizes down to reasonable limits...
  10. tph216

    Unstayed Flat Head Query

    UG-34 equation (1) for thickness seems to me to give a very conservative value when 2UTS/7 is used as the basic allowable stress level SE. As far as I can see, the major stress type in the head is general primary bending, with general primary membrane being extremely low, almost absent. As...

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