Is a circular split line balloon acceptable in ASME/ANSI drawings

[DSzuch]

My employer's drawing standards are to be interpreted per IAW ASME Y14.100-2004. With that said, the CAD package we are moving to has the option in an assembly drawing to create item ballons that are "circular split line balloons" which segments the balloon into upper and lower halves. The upper half would have the item number that corresponds to the BOM list and the lower half would have the quantity of that item used in the assembly.

I need to know if this "circular split line balloon" convention is allowed per the IAW ASME Y14.100-2004 standard. And if so, where in the standard.

 

[KENAT]

As far as I know this split balloon is not shown anywhere in the standards.

That said there is relatively little in the standards about balloons etc.

Y14.24 would be one place to look, 14.100 may even have a sentance or two but nothing jumps out at me.

When we more strictly implemented ASME drawing standards we discontinued use of these split balloons as, since there use wasn't defined anywhere we could find, it might lead to confusion.

forum1103 may be a better place to ask drawing related questions..

KENAT,

Have you reminded yourself of faq731-376 recently, or taken a look at posting policies:

http://eng-tips.com/market.cfm?

What is Engineering anyway: faq1088-1484

 

[ewh]

Since split balloons are used to denote datum points, I avoid using them for purposes other than that.

"Good to know you got shoes to wear when you find the floor." - [small]Robert Hunter[/small]

 

[chicopee]

The split balloon has two purposes. The upper half designates either an item or section number and the lower half designates a sheet number. A particular feature that is too detailed for that one sheet, you would be referred to another sheet for those finer details.

This split balloon is found in architectural and mechanical drawings.

Split balloon are also found when using GD&T in mechanical drawings. Because of the complexity of the GD&T information shown in these split balloons, you should get a copy of ANSI/ASME Y14.5M for their meanings.

 

[KENAT]

I should make clear my post was talking about only split balloons used on assy drawings for item identification. Similar is indeed used for datum targets iaw ASME Y14.5M-1994.

Chicopee that's an example of no clear definition. In the ones I've seen the bottom half was the qty not the sheet number.

I've never seen them used on what I would consider an ASME complian assy drawing. Item balloons are not dealt with in 14.5 that I can see.

KENAT,

Have you reminded yourself of faq731-376 recently, or taken a look at posting policies:

http://eng-tips.com/market.cfm?

What is Engineering anyway: faq1088-1484

 

[chicopee]

That' correct for GD&T drawings.
I forgot to mention that you also have split balloon in subtitles of architectural drawings to identify the items of interest and the page numbers.

 

[cadman1964]

I can't personally tell you if it's in IAW ASME Y14.100-2004 standard

But at a few places I've worked Ive seen it used a few different ways. At my previous employer, the top half was the item number and the bottom was the station number. Here where i work now, it's not used as much. I'll use it once in awhile when we do combo jobs. But when i do use it here, i'll place the split balloon down by the title box info and put what each half means.

Solid Edge V20