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Class 150 blind flanges are used for blanking low-pressure pipeline ends and reserved equipment connections, facilitating pipeline expansion and maintenance in the later stage.
Class 300 blind flanges are used for sealing and blanking the ends of medium-pressure pipelines and spare equipment connections, facilitating later modification and maintenance.
Class 600 blind flanges are used for sealing and blanking spare connections of medium-high pressure process pipelines and pressure vessels to meet the isolation requirements of high-pressure media.
Class 900 blind flanges are used to seal and blank reserved nozzles of high-pressure oil, gas and chemical pipelines as well as high-pressure equipment for isolating high-pressure media.
Class 1500 blind flanges are suitable for sealing and blanking reserved ports of high-pressure hydrogenation pipelines, high-pressure chemical pipelines and pressure vessels.
Class 2500 blind flanges are used for blanking nozzles of ultra-high pressure hydrogenation units and supercritical equipment, providing isolation and sealing against extremely high-pressure media.