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ASME standard for dimensioning cut tubing

ASME standard for dimensioning cut tubing

ASME standard for dimensioning cut tubing

(OP)
Is there a place int he ASME standard that specifies how to dimension a stock tube cut to length with an angle on the end. I am getting different interpretations on dwgs I am seeing.

Options:

1)Overall length and an angle
2)Length on each side of the tube
3)something else

Thanks

RE: ASME standard for dimensioning cut tubing

awidrig,

   I am not aware of a specific ASME procedure for dimensioning cut tubes.  Overall length and angle, and length on each side of the tube are interpretable by ASME Y14.5M-1994.  I, personally, would prefer overall length and an angle.

   Is this process tubing, or are these precision machined parts?

   If this is a precision machined part, your overall length with a ± tolerance, is ambiguous.  The machinist is going to take the sharp edge off, and this will affect your as-measured length.  If your length and angle are basic dimensions, you can apply profile and angle tolerances to the angled face.  This makes for a precise definition of your tube end.

               JHG

RE: ASME standard for dimensioning cut tubing

Drawoh:
Where are you envisioning the basic length dimension of the tube to terminate? At the OAL of the tube? At the center of the angle (centerline of the tube)?
 

RE: ASME standard for dimensioning cut tubing

CheckerRon,

   I have designed and drawn up a number of 45° mirror mounts, which present the precise dimensioning problem described above (by me, if not by the OP).

   I show the height to the top, sharp corner.  It has never occured to me to dimension to the centre.  The maximum height is more useful to a machinist.  The centre height requirement is to the top face of the optic, and is shown elsewhere in my documentation.  A sloppy diameter does affect the position of the angled face.  

   On occasion, I have drawn phantom lines off to the side, and applied a basic dimension to the vertex.

   However you do it, the feature is not directly measurable.  You have to specify a basic dimension, and attach an FCF to the angled face.

   My drawings are to a large enough scale that there is no confusion about what I am dimensioning to.  I do not see a way around this.  If you want to do single-line tubing isometrics, you are going to have to cut your tubes off straight.  

               JHG

RE: ASME standard for dimensioning cut tubing

drawoh:
Actually I would dimension it to the OAL the same as you, and not to the centreline of the tube, but the question popped in my mind as I read your third paragraph.

 I'm not sure why (in retrospect) since you did say straightaway that you preferred overall length and angle.

I guess I got sidetracked in that discussion about rounding off the corner.

Respectfully, I am trying to use my best English english. My buddy KENAT would appreciate that.  

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