huangyhg

is dimensioning/detailing in isometric view acceptable??
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.)
check out y14.41
"wildfires are dangerous, hard to control, and economically catastrophic."
ben loosli
sr is technologist
l-3 communications
from my limited knowledge of what y14.41 is about doesn't it refer to digital information, especially 3d?
i'm talking about 2d drawings that effectively get 'printed' albeit normally to pdf not hard copy.
would 14.41 still be applicable?
ken
ben is correct. while it doesn't specifically address assembly drawings, it does allow for detailing of axonometric views.
we've been talking about trying to get a copy of 14.41 for a while now, maybe now's the time then.
thanks to both of you,
ken
you should try to get a copy of 14.41. it doesn't only involve 3d modeling, but also covers the drawing details of the mbd. in addition, there are updates to gd&t that will probably be included in the next release of y14.5 (profile tolerancing for example).
here we have yet another case of a general question with no specifics and a bunch of general answers that may or may not address the object the questioner had in mind.
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?
complex piping systems may be more easily defined in an iso view, but i would suggest checking the applicable standard to determine if they are allowed.
it was an intentionally general question. it isn't regarding a specific drawing or application. we are in the process of setting drawing standards for our section of the company and it was in support of this i was raising the query. currently they don't have any real standards, they don't even really follow the y14 series.
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.
kenat,
this is the correct forum, and you have not broken any rules.
regards,
cory
this is as good a place to ask the question as any. i don't have access to a copy of the asme standards pertaining to drawing views, but per the genium drafting manual (which is based on these standards), isometric drawings are allowed, and are considered pictorial drawings, "which may be prepared to completely replace or avoid preparation of conventional drawings". hope that helps!

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