The ethylene unit pre-cutting columnis a critical separation unit in ethylene cracking plants, located downstream of the quench system. Its primary function is to perform preliminary fractionation of cracked gas, separating light components (such as hydrogen and methane) from heavy components (C₅+). This process provides pretreated feedstock for subsequent units like the demethanizer and deethanizer.Shandong Lianmeng Special Equipment Co., Ltd. had offered DN3900×60900×60mm, S30408 ethylene unit pre-cutting column for customer.