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  • Difference between surface contact mesh and mesh mating condition
    I am using NX 7 5, my doubt is applying these contact mesh will it affect the weld mesh which are there in the contact region and if yes what will be the effect
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    Can anybody explain in simple terms for a truss newbie What is the difference between designing a truss with two pinned supports and designing it with one pinned and one rolling?
  • Effect of Molecular Weight On Compressor Performance
    Dear All, I have extensively studying the analysis of the impact of Molecular weight changes on fixed speed and variable speed compressors Can you provide your feedback on the below simplified summary: 1) Fixed Speed Compressor, fixed compression ratio, speed and head at every flow: a) With
  • Please help clarify datum shift vs bonus tolerance | Eng-Tips
    Then the datum shift is the difference between the actual size and the virtual condition size developed by the refinement tolerance If the same hole was a tertiary, the the shift is the difference between the actual size and the virtual condition size developed through the positional tolerance rather than the refinement
  • NPSH vs. Pressure - Eng-Tips
    Hi all, I am having trouble trying to distinguish the difference between NPSH and pressure I know that NPSHr is what you must have in order for the pump to not cavitate It is equal to: (static height) + (pressure within vessel) - (vapor pressure) - (pipe friction losses) For example
  • Torque spec changes from nut to bolt head? - Eng-Tips
    In a torque spec for a typical bolt, washer and nut arrangement, is the proper torque value affected whether it is applied to the bolt head as opposed to the nut? Thanks!
  • Motor Starting Power amp; Power Factor | Eng-Tips
    The starting power factor has nothing to do with with running load kW 0 36 sounds a little high, but the difference between assuming 0 2 and 0 36 should not be too significant You need to pick a NEMA starting code in the softwware that matches the actual starting current data for your motor
  • Internal wind pressure - Eng-Tips
    So when you get a net difference between a set internal pressure and a different exterior pressure, you get a net pressure applied to the walls of the box This is not necessarily the full internal pressure effect used in ASCE 7
  • Virtual condition | Eng-Tips
    This nameless boundary limits the variation of the surface of the hole relative to datums A and B and the unused (in a feature control frame) datum D, by different bounding sizes in different directions (because of the difference between position X tolerance in the direction normal to B and Y tolerance affecting the hole location in the
  • Bellows design PSVs selection | Eng-Tips
    You need to understand the difference between 'built up' and 'superimposed' back pressures Built up back pressure develops from the point of initial PRV opening - in these cases, where there is no other back pressure specified, you are permitted to use a conventional design spring operated pressure relief valve up to a maximum built up back





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