Saw

This puzzle is again very familiar by now from any of the gas-filled rooms you've been stuck in. The basic strategy here is to work from the outside in. Start and make sure that the outside ring has two pieces that are touching the red tubes and that the pipes coming off of them are angling toward the middle. If you have one combination that has them curling back in on themselves, that obviously isn't going to match up and have them meet in the middle. From there, use that same philosophy and work one by one until the middle pieces. Many sections will look like two options can work, so you really have no choice but trial and error. Again though, you want to always have the pipes heading toward the middle, so start with whichever looks best with that in mind.