Sorry for the delay in getting this uploaded I got side tracked last night.

Here are two videos showing how to use profile curves to make cutting planes to use to cut up a polygon pipe using booleans.

The first video is about 15 minutes and covers the creation of the top section and the second video is only 5 minutes and shows how to create the bottom section for a perfectly fitted completed part.

I dropped the step to split the model in half as it was not necessary.

I hope you find this helpful. Please feel free to ask any questions if anything confuses you.

I am not sure how much bandwidth I have remaining on screencast.com so if I run out and you cannot run the video I will put another copy of both on YouTube.com later today.

Here is what we make:



Here is the link to part 1 - the top section...

https://www.screencast.com/t/YWVjODU5ZDk

Here is the link to part 2 - the bottom section...

https://www.screencast.com/t/NzIxODEyY2

Enjoy! I will post the .obj final file later.