How do you define the length of application for a cylindrical geometric tolerance in ASME Y14.5?

[RayPastrana]

I'm making drawings of tubes at work. These tubes need to fit inside other expanded tubes, fittings, and sockets, and then go under brazing.

In order to comply with our brazing standards we need to have a certain gap between the parts and control the shape.

Applying rule #1 of ASME Y14.5 grants me an envelope, but I need to control the cylindricity of the surface of the male section of the tube.

My question is:

How can I define an area/length/zone of application for a geometric tolerance? In this specific case, cylindricity.​

I've been researching and found a good thread that talked about this but in regards with straightness and flatness.

https://www.eng-tips.com/viewthread.cfm?qid=483112

I know that you can get around these kind of problems via notes, but I want to know if there's any notation that can mean what I want.

Thanks in advance for the aid in this, my first post.
Ray

 

[3DDave]

Add a chain line to point the tolerance to.

Per the 2009 version "If applied to a surface of revolution,the indication may be shown on one side only."

 

[RayPastrana]

Thanks Dave,

Do you mean, something like this?

Or should the constraint point to the surface of the geometry, instead of the dotted line? or does it matter at all?

EDIT:

I found the standard that defines the chain line to specify an area: