Catalyst Tube Outlet Header 1.Standard:ASME,ANSI,ASTM,DIN,GB 2.Material: ... +MA 3.ISO9001:2008 4.37 years' experience Catalyst Tube Outlet Header1.Standard:ASME,ANSI,ASTM,DIN,GB2.Material:Alloy ZG40Cr25Ni35Nb ... .Certification:ISO9001:200810.Payment:L/C,T/T Catalyst Tube Outlet Header