ASME B16.47 Series B/API 605 Class 900 BL

Norminal Pipe Size O.D.of Flange, O Min.Thick-ness of BL Flange, tf Raised Fase Diam., R Diam of Bolt Circle No.of Bolt Holes Diam.of Bolt Hole Approxi-mate Weight kgs
26 1020 154.0 762 901.7 20 66.7 929.16
28 1105 166.7 819 971.6 20 73.0 1175.15
30 1180 176.1 876 1035.0 20 79.4 1409.12
32 1240 186.0 927 1092.2 20 79.4 1657.09
34 1315 195.0 991 1155.7 20 85.7 1946.10
36 1345 201.7 1029 1200.2 24 79.4 2108.86


Standards, Dimensions & Weight of Blind flanges

What is the use of a blind flange

Most common flange types

Regardless of custom sizing or specifications, the fundamental design of most flanges falls under six common styles created to close, connect, cover, or support pipes and pipe systems.



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