... ,GB 2.Material:ZG45Ni35Cr25Nb,G4852,1.4852Micro 3.ISO9001:2008 Petrochemical Ethylene Cracking Furnaces1.Standard:ASME,ANSI,ASTM,DIN,GB2.Material ... coil pressure drop,KPa10-200Ethylene capacity,mta20,000-250,000 Petrochemical Ethylene Cracking Furnaces