TARIC 8419.89.98.10 — Pre-assembled process module unit of an ethane cracker unit, containing:equipment associated with an external multi-stage, centrifugal cracked gas compressor which compresses hydrocarbon gases to allow further processing downstream in interconnected equipment containing: -​coolers, -vapor-liquid separation drums, and -pumps needed to condense and remove water and heavier hydrocarbons and to avoid undesirable formation of polymer by-products, equipment associated with an external caustic wash tower containing:  -caustic water circulation pumps to support an external caustic wash tower in removing acid gasses (carbon dioxide and hydrogen sulphide) from the cracked gas,  -a spent caustic pre-treatment system, containing separation drums, pumps and mixers,  -a heat exchanger for the pre-cooling of cracked gas, and  -a separation drum for the removal of water from cracker gas