Take the two 15mm galvanised elbows and screw them onto the ends of the 900mm pipe.
Then screw the two 250mm threaded pipes into the elbows.
Take the two 15mm flanges and screw them onto the 250mm threaded pipes. Then adjust all of the fittings so that everything is square and it will easily fit to the ceiling.
We're using a black spray paint to give the clothes hanger an industrial look, but you can use whatever colour you like. A good tip is to paint the screws as well so that they match the flanges. Don't forget to use a drop sheet to keep paint off your work surface. You may need to apply two coats to the hanger and the screws for a great look.