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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.
Suitable for Class 900 high‑pressure process pipelines, for plant maintenance, system isolation and process switching conditions. It enables visual open‑closed status indication, effectively blocks medium flow, and ensures safety for equipment maintenance and pipeline pressure‑testing operations.
Suitable for Class 1500 high‑pressure pipelines, chemical plant maintenance isolation, process flow switching and pipeline hydrostatic test scenarios. It enables clear open‑closed identification, reliable shut‑off of high‑pressure media, and meets the safety isolation requirements under severe working conditions.