[Class : 6] Pipes, Tubes And Hoses, And Parts Thereof, Including Valves, Of Metal; Valves Of Metal For Controlling Gas Flow In Ducts; Valves Of Metal Other Than Parts Of Machines; Connecting Tubes Of Metal For Pipelines; Metal Seals For Pipes And Valves; Metal Flap Valves; Valves Of Metal For Controlling Fluid Flow In Pipelines.