Thanks for the kind words Eggy, I really appreciate it.
This is the way I worked on this project.
I started with one cube. Cut and sliced it to look like a building with room for the different floors and space for the pipes.
1. I designed one pipe.
2. Made a duplicate for the next step, a 90 degree bent.
3. Made a duplicate of this and added an extrusion at the end.
4. Assembled the pipes between the floors and along the building horizontally and vertically. This is a difficult step!
5. Designed one Tower.
6. Designed one Storage Tank.
7. Designed one Pump.
8. Designed one Ladder
9. Arranged the different objects like in this image.
10. Coloring all the objects.
11. Added texture to some of the objects.
12. Selected all objects and made 2 duplicates of them.
13. Rotated one of it 90 degrees and positioned it.
14. Rotated the other one -90 degrees and positioned it.
15. Rendered the image.
16. PS work to add steam and flames and the sky.
Of course this is the short version of a very long way to the final image.
I hope the structure of these 16 steps will help you to see how I work without getting lost.
Like always I had many setbacks on this project which was very frustrating at times.
But the good thing is I'm a hobby designer and I have no boss who watches over my shoulder.