... ASME,DIN,GB 2.Material:alloy 3.Certification:ISO9001:2008 components for steam cracker Y Piece Tube1.Standard:ASTM,ASME,ANSI,DIN ... centrifugal casting5.Quality:appearance of smooth,can work under presure for long time,advanced testing equipment to ensure thye quality, ... :ISO9001:200810.Payment:L/C,T/T11.Application:Used for Ethylene cracking furnace components for steam cracker Y Piece Tube