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  • Users: fred2002
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  1. fred2002

    Seal interspace leak test

    Greetings! I have been asked to come up with a method of checking the sealing integrity of a double O-ring static seal arrangement. There is an interspace with a test tapping point. The seals are pressurised from the outside. The acceptance criteria for the seal integrity is a specific volume...
  2. fred2002

    Gas Mixtures and Concentrations

    The technical specification we have received from our customer says that 50 litre bottles will be supplied with a mixture of gas A and gas B at 200 barg. We also know that gas A will be 4.5% by volume and gas B 95.5% by volume. The temperature is also known. How do I go about calculating what...
  3. fred2002

    NX4 Assert Value (mass)

    The default mass unit on my installation of NX4 is 'kg'. However, when I try to assert a value for mass only, the prompt line says 'Assert values (in G -Mm) or mark as unknown'. Does anybody know why G i.e. grams seem to be the default or where it can be changed to kilograms instead. Thanks in...
  4. fred2002

    Ferodo friction coating

    Does anybody have any info on Ferodo MP brake coating material? I am trying to find a modern equivalent as the MP spec may have contained asbestos. If you have a datasheet, so much the better. Thanks in advance.
  5. fred2002

    The Simple Pressure Vessels (Safety) Regulations 1991

    Are these regulations applicable to a pressure vessel which will see an internal vacuum of 500 mbar? If not, what legislation is?
  6. fred2002

    Stainless Steel Storage Tank

    Can anybody suggest a suitable design code (British or European preferably) for a vertical stainless steel storage tank which will contain an acidic solution? The tank will have removable heaters, probably electric, to raise the temperature of the contents to about 50 deg Celsius. Will this...
  7. fred2002

    NX4 Sketch Limits

    Is there a defined number of entities within a sketch (i.e. curves and constraints) above which the software cannot cope? Is this defined by the memory and speed of the computer? Thanks in advance. Fred.
  8. fred2002

    BS 6399-2 Wind Loading on Cylindrical Silos

    Has anyone tried to use this standard to calculate the wind load on a cylindrical silo. I have got as far as getting the dynamic pressure, qs, but have no idea how to use Table 7 to get the overall pressure coeffient. Do I have to sum all the coefficients for every angle on the periphery and...
  9. fred2002

    UG NX2 to and from Catia v5 translation

    We will be receiving some models in Catia V5 format (catpart and catproduct) from our customer and will need to translate it into UG NX2 format to use as interface information. At some later stage we will have to convert our models into CATIA files. The models are very likely to contain...
  10. fred2002

    How to size a strongback?

    I am trying to size an I-beam to be used as a strongback when machining a stainless steel plate 1300mm x 160mm x 30mm (LxWxD approx). Deflection is expected to be about 35mm out of the 1300x160 plane. Q1. Can I assume that the stresses induced by machining are equivalent to a cantilevered beam...
  11. fred2002

    Placing User-Defined Symbols in UG v18 Drafting

    I'm trying to place 'gap' symbols on dimensions created in Drafting (Add to drafting object). UG seems to have a mind of its own and decides for itself where it wants to place the symbol. When I try and move it using Edit > Component > Move, it is still fussy about where it is put. Is there...
  12. fred2002

    UG v18 - Drawing Object Associativity

    I'm having trouble editing a drawing in that when I select Edit > Drawing Object Associativity and select a dimension, I get an error message saying "Cannot edit associativity for sketch dimension". What would be causing this and how can it be solved? Thanks in advance.
  13. fred2002

    UG Sketcher

    When you deactivate a sketch in UG the dimensions etc are supposed to disappear. However in a sketch of mine, this isn't happening. Does anybody know what's causing it and also how to fix it? Thanks
  14. fred2002

    Involute Form in Sketch

    Does anybody know how to create an involute gear tooth profile in a UG sketch? I'm currently using v18 and haven't got access to the GTAC. Thanks
  15. fred2002

    Cad Potato

    Is this useful website (www.cadpotato.com) still available?
  16. fred2002

    UG Part Families

    Is it possible to create Assembly families using the part families tools? They would have to be capable of being called up in UG Routing. Another website I have looked at mentions using placeholders. Has anyone got any hints or tips, please? Thanks. BTW, I am using UG v16.
  17. fred2002

    Errors with interpart expressions

    I am trying to create an interpart expression in UG v16 between the top level of an assembly and a component part. I have created an expression at the top level and applied it. When I go to the component part and try to reference this expression using Tools > Expression > (Select expression to...

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