Catalyst Tube Outlet Header 1.Standard:ASME,ANSI,ASTM,DIN,GB 2.Material:25Cr35Ni+MA 3.ISO9001:2008 4.37 years' experience Catalyst Tube Outlet Header1.Standard:ASME,ANSI,ASTM,DIN,GB2.Material:Alloy ZG40Cr25Ni35Nb,Hp-Nb+MA3.Size:Dia.120mm,or we can supply standard and nonstandard products as your requirement4.Process: casting5.Quality:appearance of smooth,can work under presure for long time, ...