... DIN,GB 2.Material:25Cr35Ni+MA 3.ISO9001:2008 Ethylene Plant Steam Cracker Coil Systems1.Standard:ASME,ANSI,ASTM,DIN,GB2 ... Da Qing Petrochemical Company 1,200,000 Ton/Year Ethylene Plant.Commercial furnacesThermal cracking of hygrocarbons is accomplished in tubular reactors ... of single cell furnace is well over 150,000 mta.Pyrolysis heater radiant coil characteristics(single heater range)Number of coils ...