Is dimensioning/detailing in isometric view acceptable??
Is dimensioning/detailing in isometric view acceptable??
(OP)
My senior design checker and I are trying to determine whether dimensioning/detailing parts and assemblies in isometric views is acceptable to the standards (ASME Y14 series).
Looked through 14.3 and the first part of 14.5 and didn't see it explicitly stated.
Both of us are of the opinion it's generally a bad idea and we don't like it but we're trying to verify whether that's actually based on the standards or just ingrained prejudice!
If anyone knows for sure the answer or where we need to look please let me know.
(Plus for now can we stick with the world of 2D drawings, obviously this question doesn’t really make sense for MBD.)
Looked through 14.3 and the first part of 14.5 and didn't see it explicitly stated.
Both of us are of the opinion it's generally a bad idea and we don't like it but we're trying to verify whether that's actually based on the standards or just ingrained prejudice!
If anyone knows for sure the answer or where we need to look please let me know.
(Plus for now can we stick with the world of 2D drawings, obviously this question doesn’t really make sense for MBD.)





RE: Is dimensioning/detailing in isometric view acceptable??
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RE: Is dimensioning/detailing in isometric view acceptable??
I'm talking about 2D drawings that effectively get 'printed' albeit normally to pdf not hard copy.
Would 14.41 still be applicable?
Ken
RE: Is dimensioning/detailing in isometric view acceptable??
RE: Is dimensioning/detailing in isometric view acceptable??
Thanks to both of you,
Ken
RE: Is dimensioning/detailing in isometric view acceptable??
RE: Is dimensioning/detailing in isometric view acceptable??
The detailing and demension is normal subject specific.
Example: complex piping systems are best displeyed in isometric. They can easily be detailed and demensioned in the isometric view.
So what is the object being detailed and demensiond?
RE: Is dimensioning/detailing in isometric view acceptable??
RE: Is dimensioning/detailing in isometric view acceptable??
Piping is one of the areas our checker said he had extensively used dimensioning in iso views. We don't really do that type of piping, I perhaps could have put that in my original post but was just trying to get a feel for peoples standard practices and if we'd missed something in the standards someone here knew.
There are a few regular posters here who’s opinion I am beginning to value and wanted to see what they or anyone else had to say.
If this is the wrong place for a general question then please direct me to the right forum, I’m fairly new to eng-tips so apologies if I’ve broken a rule I was unaware of.
If there isn’t such a forum then maybe I’ll look at starting one if there would be any interest.
RE: Is dimensioning/detailing in isometric view acceptable??
This is the correct forum, and you have not broken any rules.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Is dimensioning/detailing in isometric view acceptable??
RE: Is dimensioning/detailing in isometric view acceptable??
Regards,
Namdac
RE: Is dimensioning/detailing in isometric view acceptable??
RE: Is dimensioning/detailing in isometric view acceptable??
Thanks for the tip on the Genium Manual, I'll have to take another look at it as I obviously missed something.
We looked at getting a copy of 14.41 but aren't sure we can justify the cost at the moment, both my checker and I are keen to get a look at it though.
namdac,
Totally agree on hidden lines, I rarely even use them and certainly don't dimension to them. I too don't get what you mean by 'double dutied', I even asked my checker (who's been around plenty long enough to hear of most things) and he wasn't sure so If you could clarify that would be great.
Ken
RE: Is dimensioning/detailing in isometric view acceptable??
Namdac- "Dimensioning in an Isometric view is acceptable, if it is to show information that can not be shown by any other views." I have never come across a feature that could be dimensioned in an isometric view but not in a standard or auxilary view. Somethings may be easier to show in an iso view but I wouldn't say that it was a recommended practice. At most I might use an iso view for a reference dimension.
RE: Is dimensioning/detailing in isometric view acceptable??
RE: Is dimensioning/detailing in isometric view acceptable??
I must concede to you being as I do not currently have a copy of the ASME standard (I am working on remedying that). I did not say however that it was not acceptable. I did say however that I would be hard pressed to find an example in which I was able to dimension something pictorialy and not orthographicly. I will say that a pictoral view with the exception of something drawn entirely in compliance with Y14.41 (which I have not read but I infer to be concerned primarily with 3d drawing files not 2d drawings), in many cases is not capable of comunicating all information nessesary to completely describe a part. I would have a very hard time accepting a mostly orthograpic drawing with some features dimensioned in a pictoral view, or vice versa.
RE: Is dimensioning/detailing in isometric view acceptable??
RE: Is dimensioning/detailing in isometric view acceptable??
We reference Y14.5 on our drawings. We don't reference Y14.41.
Therefore I guess what Y14.41 says isn't necessarily directly relevant.
That said we use a lot of the y series standards we don't directly reference to influence our drawing standards so maybe what I said doesn't make sense.
RE: Is dimensioning/detailing in isometric view acceptable??
RE: Is dimensioning/detailing in isometric view acceptable??
We reference Y14.100 as our first standard note. We then bring specific attension to Y14.5 as our second standard note.
Y14.100 does include 14.41 as a reference.
So depending how you look at it we could infer 14.41.
Maybe we need to look again at getting a copy.
RE: Is dimensioning/detailing in isometric view acceptable??
RE: Is dimensioning/detailing in isometric view acceptable??
Double Duty means using the same arrow head for more than one dimension.
Regards,
Namdac
RE: Is dimensioning/detailing in isometric view acceptable??
Makes sense.
Ken
RE: Is dimensioning/detailing in isometric view acceptable??