Metric pipe sizes and labels

[CarrieHoffman02]

I am using a pipe family from Charlotte Pipe that draws pipe at the correct dimension. (A 100 pipe is actually 101.6) However I need the pipe size tag to say 100. How do I do this? 

[whitbrs · Accepted solution]

Theres a couple of ways to do this:

1. Change the Project Units so they are rounded, say to the nearest 10mm
2. Or, create a new pipe tag, with a new shared parameter for pipe size, this way you can keep your project units intact, and have a metric pipe tag.

Hope this helps

[CarrieHoffman02]

Awesome!!! #2 worked perfectly and easily!

[mroachduquette]

This is true for 100ø pipe but what about for 3" imperial pipe or 1.5" pipe converted to metric? You'll want this to display 75ø or 38ø. rounding to nearest 10mm would show 80ø.

To do so add a calculated parameter to the tag.

if(Diameter > 50 mm, rounddown(Diameter / 5 mm) * 5, Diameter / 1 mm)

This ensures that 2" pipes and up are rounded to their true " metric values" and 1.5" pipes and down are rounded to 13mm, 19mm, 25mm, 32mm and 38mm respectively 

[iainsavage]

The pipe segment should be set up to use the required nominal diameter e.g. 65mm, 80mm, 100mm etc and the true inside and outside diameters then the built in Size parameter will give the correct value in the tag.

[mroachduquette]

That is true for pipe types corresponding to metric values. I agree you would want to use the nominal (100mm, 75mm etc) values with pipe types. 

I am speaking of something different. In order to use manufacturer produced pipe accessories and fittings, these are sometimes produced in imperial measurements. Therefore a imperial pipe type is required to establish a connection.

When your project is in metric, you don't want to see a 4" nominal pipe which we abbreviate as 100mm depicted as 101.6mm or 102mm. To properly depict this, a rounding function is required. 

[fabiosato]

Hello,

I suggest creating a shared parameter to keep this value and have its value extracted from a lookup table.

[iainsavage]

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@mroachduquette  schrieb:

That is true for pipe types corresponding to metric values. I agree you would want to use the nominal (100mm, 75mm etc) values with pipe types. 

I am speaking of something different. In order to use manufacturer produced pipe accessories and fittings, these are sometimes produced in imperial measurements.

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I only use metric pipe in metric projects hence my confusion. Aplologies for misunderstanding.