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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...

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...

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...

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.

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

...are static depth pressures. The maximum tank height will be about 1.5 metres and the depth of solution about 1.2 metres. So depth pressure = 1000*9.81*1.2 = 11772 Pa = 0.117 bar = 117 mbar. 5% acid solution temperature will be 50 deg celsius. The tank, although covered, will be open to...

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...

I am creating a sketch with some curves which define some engraving for a part. I have got to the stage where my computer 'thinks' for a long time before creating a new constraint which would not normally cause a problem. Adding the final constraint also tends to make the sketch overconstrained.

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.

Oops, clicked submit instead of edit! Got there in the end! Fred

Thanks for the link, ewh. I hope this works

I know what you mean. But this way allows the tolerance to stay associative to the geometry (unlike a line in expanded views) and doesn't rely on having an existing dimension in the right place (if adding to an existing extension line). I tend to find this method more flexible and posted it as...

If you want to have an arrow pointing at 90 deg to the end surface, try this: 1. Create another horizontal dimension, as if you were adding another length dimension. 2. Edit the dimension by right-clicking on it. 3. Change placement to arrows out and drag the number in the dimension to either...

Thank you for all your contributions. I am at a complete loss as to how a fairly useful standard like CP3 V-2 (in that it gave alternatives to square blocks) turned into BS 6399-2. CP3 gives force coefficients for different non-rectangular sections whereas 6399-2 gives the pressure coefficient...

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...

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...

Either using 2 or 3 tabs at each end to clamp on to, or a couple of holes to bolt through.

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...

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...

To clarify a bit further, the dimensions were created in UG Drafting using Insert > Dimension etc., not Insert > Model Parameters > Feature.. Furthermore, when the dimensions were created, I was unable to position them as intended. Boxes added to dimensions would not be applied, and updated...