Blind flange and blind flange are the same flange type, there is no center hole on flange, EN1092-1 DIN BS4504 UNI GOST12815-80 blind type pressure PN6 PN10 PN16 PN25 PN40 facing type FF RF, ANSI B16.5 and B16.47 class 150 300 600 900 1500 2500 facing type RF RTJ, JIS blind class 5K 10K 20K, facing FF RF
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