... public diameter: 15 ~ 4000mm c, The flange structure type: Flat plate welding type, Flat welded loop ... 0Mpa), b, The public diameter: 6 ~ 4000mm c, Flange structure type: welding, socket welding, threaded connection ... socket weld flange with neck , slipon plate flange c, Loose flange, Butt weld ring with ... loose with neck flange, Butt weld ring with loose with plate ...