How to offset a sketch, or a plane? [beginner question]

[grzesiek.wilczek]

Hi,

That's my first post & question here and I'm just beginning to learn Fusion 360. 
I'm trying to move a sketch I've drawn in it's 3rd dimension (perpendicular to it's plane). The only thing I can get is "offset plane" but the sketch doesn't follow.

So, below:

I have a sketch, which I'd later like to extrude, but first - I don't want it to be on face with the edge of the pipe, I want it to be 18mm "down the pipe" (towards top-left in this view). How do I do that?
Should I first somehow create a plane 18mm away from the edge?

And if yes - how do I copy the curvature of the pipe (and generally - how do use pipe as construction/constraint/guide)?

I think I'm missing some design principles here, so any help would be appreciated.

[jhackney1972 · Accepted solution]

Next time you post a question concerning a model, make sure you attach the model.  I created one to demo in my video, it is in inches but that does not matter.  One thing I forgot to mention, you can edit the location of the first offset work plane by right clicking on it and change the dimension.

[grzesiek.wilczek]

Wow. Thanks a lot for:

• quick response
• thorough response
• a video... with voice... 

I'm in awe. Thank you again.