The utility model discloses a flanged welding formula hose assembly of easy installation, including hose, joint, flange, screw rod, elasticity sealing washer, first elasticity seal cover, second elasticity seal cover, even there is the joint at the hose both ends, connect to be equipped with the flange on the outer wall, and the hose side of keeping away from of flange is fixed with the first mounting groove of round and a plurality of screw rod, and the originated pot head of screw rod has a second elasticity seal cover, the hose side of keeping away from of flange has the connecting pipe, and the cover has a first elasticity seal cover on the connecting pipe, and in the connecting pipe stretched into the pipeline, the pipeline end fixing had a connection pad with flange matched with, have a plurality ofly on the connection pad and screw rod matched with locating hole, the screw rod passes the locating hole, and it has the nut to twist on the screw rod. The utility model discloses a connecting the flange setting, the cooperation connection pad makes the welding become convenient, and difficult damage connects and the pipeline during welding, the screw rod is fixed on the flange, be convenient for hose assembly's the installation of cooperation locating hole, convenient to use.