S+C G1.4852 Catalyst Tubes 1.Standard:ASTM,ASME,DIN, ... Microalloy,HP-Nb+MA,G1.4852 3.ISO9001:2008 S+C G1.4852 Catalyst Tubes GradeC Si MnCr Ni Nb PSOtherZG45Ni35Cr25Nb ... departure:Shanghai,Dalian;Qiangdao etc.9.Certification:ISO9001:200810.Payment:L/C,T/T11.Application:Used in Petrochemicals level, have Excellent Corrosion ... of growth is essential for safe plant operation. S+C G1.4852 catalyst tubes