Coaxial Cylinder Weld Symbols

[BiPolarMoment]

I've searched but with little help on how a weld is interpreted on cylinders when they abut another cylinder and the view is perpendicular to axis (see attached).

Of the three examples shown I can't see how any mean anything different (all are all-around anyway) though the 3rd seems redundant. Is there a different view or preference for specifying welds on abutting coaxial cylinders?

I can imagine if it were a hollow cylinder instead of a solid cylinder there might be a different interpretation, but I would still have my doubts depending on the drawing view.

 

[PeterStock]

I would use the top one. The middle says to weld the farside, which since the weld is all around ends up the same. The bottom says to weld both sides, also the same in the end.

Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services

http://www.infotechpr.net

http://www.linkedin.com/profile/view?id=30064526&trk=tab_pro

 

[dtmbiz]

The 1st would be the one to use. Since the cylinders are solid it would be impossible to use the lower 2 symbols because they are the "other side". The "other side" would be on the ID of the cylinder joint, which in this case there is no ID. "Other side" for a weld symbol means the other side of the material.

Weld symbols are read left to right. Above the horizontal line of the symbol is for the "other side" and below the horizontal line is for the "arrow side".

 

[BiPolarMoment]

Thanks for the help, that's pretty much what I have thought.

What about in a situation where you have a tube over an internal cylinder (attached).

Would any of these symbols have a different meaning and furthermore, if the internal cylinder were hollow would it change the meaning of any of them?

For example--assuming I wanted to weld both ends of the tube to the internal cylinder, do any of the symbols accurately show this or would it be best to have two separate weld symbols (one at each end)?

 

[dtmbiz]

I would use the one in section A-A. It shows clearly that both ends of the cylinder are welded.


Side note:
Are you using 1st angle projection? For 3rd angle projection the section view is behind the section cutting line.

 

[dtmbiz]

Behind the "arrow heads" of the secion line.

 

[SteveMartin]

I don't think V-groove weld symbol is appropriate to the tube over cylinder (your second post/attachment). I would normally see a fillet weld called out for this arrangement.

Regardless, while the shown symbol might technically mean to put the weld at both ends of the tube/cylinder interface I would put two seperate symbols. To me it's more clear. Opposite side on cylindrical welds usually means ID to me.

 

[BiPolarMoment]

dtmbiz: It's purely for example--it fit the way it fit on screen so I could make an image. It is 3rd angle though.

Steve: I agree, I simply re-used the symbol from the first example since I needed something to illustrate a weld.

Two symbols is certainly more clear, but I wasn't sure what the actual connotation was.