Converter flues within the range of 15ton to 300ton have been designed and manufactured since 1990. The pressures of flues are 0.8Mpa~4.0Mpa.The circulation is nature type for 80ton and below converter flues, nature + force circulation for converter flues above 80ton. Meet the needs of the domestic market (with a domestic market share of more than 80%)Meanwhile, products are exported to Korea, USA, etc.,