week 11 assignment02 modeling

This week I do some works on my assignment 02. The challenge for me is the pipes. In this scene have a lots kinds of pipes and I must focus on the details for them. This is a abandoned factory, the room is empety, no machines no works, except the pipes. That's make them so important. If I can not model the pipes well, this scene will looks not exceting.
I find some online tutorial and do my pipes and scene.This is the picture of my scene looks like until know.