S+C G1.4852 Catalyst Tubes 1.Standard:ASTM,ASME,DIN,GB 2.Material:ZG45Cr25Ni35Nb+Microalloy,HP- ... Nb+MA,G1.4852 3.ISO9001:2008 S+C G1. ... 03Ti+Zr(microelement ) 1.Standard:ASME,ANSI,ASTM,DIN,GB2.Material: ZG45Cr25Ni35Nb+Microalloy,HP-Nb+MA,G1. ... ;Qiangdao etc.9.Certification:ISO9001:200810.Payment:L/C,T/T11.Application:Used in Petrochemicals level, have ...