Forged flanges

I have a shopping list to participate in a tender. My shopping list includes three items: 3" hose, 1000 meters (10 bar) long, 4" hose, 1300 meters long(10 bar), and 6" hose, 500 meters long(15 bar), which is divided into 8 - meter sections, and the last item is 20 meters long with slip - on flanges, and the rubber material is NBR because it is used for petroleum products.