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Class 150 Socket Weld Flanges are suitable for sealing connections of small-bore pipelines for low-pressure plumbing, compressed air and miniature chemical service.
Class 300 Socket Weld Flanges are used for equipment connection of small-bore pipelines carrying medium-pressure oil products, steam and chemical media.
Class 600 Socket Weld Flanges are suitable for equipment connections of small-bore pipelines transporting medium and high-pressure oil, gas, steam and chemical media.
Class 900 Socket Weld Flanges are mostly used for connections of small-bore pipelines carrying high-pressure steam, high-pressure oil & gas and high-pressure small pipelines in fine chemical industry.
Class 1500 Socket Weld Flanges are suitable for connections of small-bore high-pressure process pipelines under severe working conditions such as hydrogenation and high-pressure oil & gas service.