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Class 150 Threaded Flanges are widely used for quick dismountable connections of small-bore low-pressure pipelines for water, gas and compressed air where welding is not required.
Class 300 Threaded Flanges are suitable for quick assembly connections of small-bore medium-pressure gas and oil pipelines where hot work welding is prohibited.
Class 600 Threaded Flanges are applied to quick assembly and disassembly connections of small medium-to-high pressure pipelines for oil, gas and hydraulic media in areas where hot work is forbidden.
Class 900 Threaded Flanges are suitable for small-bore high-pressure hydraulic, oil and gas pipelines where hot work is strictly prohibited, facilitating quick disassembly, assembly and maintenance.
Class 1500 Threaded Flanges are used for quick disassembly and assembly connections of small-bore high-pressure process pipelines for oil, gas and hydraulic fluids in areas where hot work is strictly prohibited.