Plate flange is the most popular using flange type, plate flange have both flat face side or one side is flat face the other side is raised face but not have neck or boss or hubbed on face, DIN EN1092-1 BS4505 GOST33259 (GOST12820-80), SANS1123 and JIS B2220 (KSB1503) all have plate flange type, ANSI B16.5 have ring plate type, plate flange pressure PN6 PN10 PN16 PN25 PN40 and ANSI B16.5 for class 150 and 300, JIS flange pressure 5K 10K 20K
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