Blind Flange dimensions by Sandco Metal Industries

Sandco Metal Industries is a leading manufacturer of blind flanges(BL). We specialize in producing high quality and close tolerance flanges. A blind flange, also known as blanking flange, is used in sealing an end of the piping system. This is generally used in high pressure applications to cease the flow of gases or liquids from one end. Blind flange is a convenient option to close an end of a pipe in large applications when compared to others due to its ease of access.

1. DIMENSIONS OF BLIND FLANGES / BL FLANGES Blind Flange, ANSI Class 150, B16.5 Pipe Size (NPS) Outside Diameter of Flange A Thickness of Flange C Diameter of Raised Face T Diameter of Groove U Groove Width W Groove Depth X Number of Bolt Holes   Diameter of Bolt Holes   Bolt Circle Diameter 1/2 - - - - - - - - - 3/4 - - - - - - - - - 1 4 1/4 1/2 2 1/2 1 7/8 11/32 1/4 4 5/8 3 1/8 1 1/4 4 5/8 9/16 2 7/8 2 1/4 11/32 1/4 4 5/8 3 1/2 1 1/2 5 5/8 3 1/4 2 9/16 11/32 1/4 4 5/8 3 7/8 2 6 11/16 4 3 1/4 11/32 1/4 4 3/4 4 3/4 2 1/2 7 13/16 4 3/4 4 11/32 1/4 4 3/4 5 1/2 3 7 1/2 7/8 5 1/4 4 1/2 11/32 1/4 4 3/4 6 3 1/2 8 1/2 7/8 6 1/16 5 3/16 11/32 1/4 8 3/4 7 4 9 7/8 6 3/4 5 7/8 11/32 1/4 8 3/4 7 1/2 5 10 7/8 7 5/8 6 3/4 11/32 1/4 8 7/8 8 1/2 6 11 15/16 8 5/8 7 5/8 11/32 1/4 8 7/8 9 1/2 8 13 1/2 1 1/16 10 3/4 9 3/4 11/32 1/4 8 7/8 11 3/4 10 16 1 1/8 13 12 11/32 1/4 12 1 14 1/4 12 19 1 3/16 16 15 11/32 1/4 12 1 17 14 21 1 5/16 16 3/4 15 5/8 11/32 1/4 12 1 1/8 18 3/4 16 23 1/2 1 3/8 19 17 7/8 11/32 1/4 16 1 1/8 21 1/4 18 25 1 1/2 21 1/2 20 3/8 11/32 1/4 16 1 1/4 22 3/4 20 27 1/2 1 5/8 23 1/2 22 11/32 1/4 20 1 1/4 25 22 29 1/2 1 3/4 25 1/2 24 1/4 11/32 1/4 20 1 3/8 27 1/4 24 32 1 13/16 28 26 1/2 11/32 1/4 20 1 3/8 29 1/2

2. Blind Flange, ANSI Class 300, B16.5 Pipe Size (NPS) Outside Diameter of Flange A Thickness of Flange C Diameter of Raised Face T Diameter of Groove U Groove Width W Groove Depth X Number of Bolt Holes   Diameter of Bolt Holes   Bolt Circle Diameter 1/2 3 3/4 1/2 2 1 11/32 9/32 7/32 4 5/8 2 5/8 3/4 4 5/8 9/16 2 1/2 1 11/16 11/32 1/4 4 3/4 3 1/4 1 4 7/8 5/8 2 3/4 2 11/32 1/4 4 3/4 3 1/2 1 1/4 5 1/4 11/16 3 1/8 2 3/8 11/32 1/4 4 3/4 3 7/8 1 1/2 6 1/8 3/4 3 9/16 2 11/16 11/32 1/4 4 7/8 4 1/2 2 6 1/2 13/16 4 1/4 3 1/4 15/32 5/16 8 3/4 5 2 1/2 7 1/2 15/16 5 4 15/32 5/16 8 7/8 5 7/8 3 8 1/4 1 1/16 5 3/4 4 7/8 15/32 5/16 8 7/8 6 5/8 3 1/2 9 1 1/8 6 1/4 5 3/16 15/32 5/16 8 7/8 7 1/4 4 10 1 3/16 6 7/8 5 7/8 15/32 5/16 8 7/8 7 7/8 5 11 1 5/16 8 1/4 7 1/8 15/32 5/16 8 7/8 9 1/4 6 12 1/2 1 3/8 9 1/2 8 5/16 15/32 5/16 12 7/8 10 5/8 8 15 1 9/16 11 7/8 10 5/8 15/32 5/16 12 1 13 10 17 1/2 1 13/16 14 12 3/4 15/32 5/16 16 1 1/8 15 1/4 12 20 1/2 1 15/16 16 1/4 15 15/32 5/16 16 1 1/4 17 3/4 14 23 2 1/16 18 16 1/2 15/32 5/16 20 1 1/4 20 1/4 16 25 1/2 2 3/16 20 18 1/2 15/32 5/16 20 1 3/8 22 1/2 18 28 2 5/16 22 5/8 21 15/32 5/16 24 1 3/8 24 3/4 20 30 1/2 2 7/16 25 23 17/32 3/8 24 1 3/8 27 22 33 2 9/16 27 25 19/32 7/16 24 1 5/8 29 1/4 24 36 2 11/16 29 1/2 27 1/4 21/32 7/16 24 1 5/8 32

3. Blind Flange, ANSI Class 400, B16.5 Pipe Size (NPS) Outside Diameter of Flange A Thickness of Flange C Diameter of Raised Face T Diameter of Groove U Groove Width W Groove Depth X Number of Bolt Holes   Diameter of Bolt Holes   Bolt Circle Diameter 1/2 3 3/4 9/16 2 1 11/32 9/32 7/32 4 5/8 2 5/8 3/4 4 5/8 5/8 2 1/2 1 11/16 11/32 1/4 4 3/4 3 1/4 1 4 7/8 11/16 2 3/4 2 11/32 1/4 4 3/4 3 1/2 1 1/4 5 1/4 13/16 3 1/8 2 3/8 11/32 1/4 4 3/4 3 7/8 1 1/2 6 1/8 7/8 3 9/16 2 11/16 11/32 1/4 4 7/8 4 1/2 2 6 1/2 1 4 1/4 3 1/4 15/32 5/16 8 3/4 5 2 1/2 7 1/2 1 1/8 5 4 15/32 5/16 8 7/8 5 7/8 3 8 1/4 1 1/4 5 3/4 4 7/8 15/32 5/16 8 7/8 6 5/8 3 1/2 9 1 3/8 6 1/4 5 3/16 15/32 5/16 8 1 7 1/4 4 10 1 3/8 6 7/8 5 7/8 15/32 5/16 8 1 7 7/8 5 11 1 1/2 8 1/4 7 1/8 15/32 5/16 8 1 9 1/4 6 12 1/2 1 5/8 9 1/2 8 5/16 15/32 5/16 12 1 10 5/8 8 15 1 7/8 11 7/8 10 5/8 15/32 5/16 12 1 1/8 13 10 17 1/2 2 1/8 14 12 3/4 15/32 5/16 16 1 1/4 15 1/4 12 20 1/2 2 1/4 16 1/4 15 15/32 5/16 16 1 3/8 17 3/4 14 23 2 3/8 18 16 1/2 15/32 5/16 20 1 3/8 20 1/4 16 25 1/2 2 1/2 20 18 1/2 15/32 5/16 20 1 1/2 22 1/2 18 28 2 5/8 22 5/8 21 15/32 5/16 24 1 1/2 24 3/4 20 30 1/2 2 3/4 25 23 17/32 3/8 24 1 5/8 27 22 33 2 7/8 27 25 19/32 7/16 24 1 3/4 29 1/4 24 36 3 29 1/2 27 1/4 21/32 7/16 24 1 7/8 32

4. Blind Flange, ANSI Class 600, B16.5 Pipe Size (NPS) Outside Diameter of Flange A Thickness of Flange C Diameter of Raised Face T Diameter of Groove U Groove Width W Groove Depth X Number of Bolt Holes   Diameter of Bolt Holes   Bolt Circle Diameter 1/2 3 3/4 9/16 2 1 11/32 9/32 7/32 4 5/8 2 5/8 3/4 4 5/8 5/8 2 1/2 1 11/16 11/32 1/4 4 3/4 3 1/4 1 4 7/8 11/16 2 3/4 2 11/32 1/4 4 3/4 3 1/2 1 1/4 5 1/4 13/16 3 1/8 2 3/8 11/32 1/4 4 3/4 3 7/8 1 1/2 6 1/8 7/8 3 9/16 2 11/16 11/32 1/4 4 7/8 4 1/2 2 6 1/2 1 4 1/4 3 1/4 15/32 5/16 8 3/4 5 2 1/2 7 1/2 1 1/8 5 4 15/32 5/16 8 7/8 5 7/8 3 8 1/4 1 1/4 5 3/4 4 7/8 15/32 5/16 8 7/8 6 5/8 3 1/2 9 1 3/8 6 1/4 5 3/16 15/32 5/16 8 1 7 1/4 4 10 3/4 1 1/2 6 7/8 5 7/8 15/32 5/16 8 1 8 1/2 5 13 1 3/4 8 1/4 7 1/8 15/32 5/16 8 1 1/8 10 1/2 6 14 1 7/8 9 1/2 8 5/16 15/32 5/16 12 1 1/8 11 1/2 8 16 1/2 2 3/16 11 7/8 10 5/8 15/32 5/16 12 1 1/4 13 3/4 10 20 2 1/2 14 12 3/4 15/32 5/16 16 1 3/8 17 12 22 2 5/8 16 1/4 15 15/32 5/16 20 1 3/8 19 1/4 14 23 3/4 2 3/4 18 16 1/2 15/32 5/16 20 1 1/2 20 3/4 16 27 3 20 18 1/2 15/32 5/16 20 1 5/8 23 3/4 18 29 1/4 3 1/4 22 5/8 21 15/32 5/16 20 1 3/4 25 3/4 20 32 3 1/2 25 23 17/32 3/8 24 1 3/4 28 1/2 22 34 1/4 3 3/4 27 25 19/32 7/16 24 1 7/8 30 5/8 24 37 4 29 1/2 27 1/4 21/32 7/16 24 2 33

5. Blind Flange, ANSI Class 900, B16.5 Pipe Size (NPS) Outside Diameter of Flange A Thickness of Flange C Diameter of Raised Face T Diameter of Groove U Groove Width W Groove Depth X Number of Bolt Holes   Diameter of Bolt Holes   Bolt Circle Diameter 1/2 4 3/4 7/8 2 3/8 1 9/16 11/32 1/4 4 7/8 3 1/4 3/4 5 1/8 1 2 5/8 1 3/4 11/32 1/4 4 7/8 3 1/2 1 5 7/8 1 1/8 2 13/16 2 11/32 1/4 4 1 4 1 1/4 6 1/4 1 1/8 3 3/16 2 3/8 11/32 1/4 4 1 4 3/8 1 1/2 7 1 1/4 3 5/8 2 11/16 11/32 1/4 4 1 1/8 4 7/8 2 8 1/2 1 1/2 4 7/8 3 3/4 15/32 5/16 8 1 6 1/2 2 1/2 9 5/8 1 5/8 5 3/8 4 1/4 15/32 5/16 8 1 1/8 7 1/2 3 9 1/2 1 1/2 6 1/8 4 7/8 15/32 5/16 8 1 7 1/2 3 1/2 - - - - - - - - - 4 11 1/2 1 3/4 7 1/8 5 7/8 15/32 5/16 8 1 1/4 9 1/4 5 13 3/4 2 8 1/2 7 1/8 15/32 5/16 8 1 3/8 11 6 15 2 3/16 9 1/2 8 5/16 15/32 5/16 12 1 1/4 12 1/2 8 18 1/2 2 1/2 12 1/8 10 5/8 15/32 5/16 12 1 1/2 15 1/2 10 21 1/2 2 3/4 14 1/4 12 3/4 15/32 5/16 16 1 1/2 18 1/2 12 24 3 1/8 16 1/2 15 15/32 5/16 20 1 1/2 21 14 25 1/4 3 3/8 18 3/8 16 1/2 21/32 7/16 20 1 5/8 22 16 27 3/4 3 1/2 20 5/8 18 1/2 21/32 7/16 20 1 3/4 24 1/4 18 31 4 23 3/8 21 25/32 1/2 20 2 27 20 33 3/4 4 1/4 25 1/2 23 25/32 1/2 20 2 1/8 29 1/2 22 - - - - - - - - - 24 41 5 1/2 30 3/8 27 1/4 1 1/16 5/8 20 2 5/8 35 1/2

6. Blind Flange, ANSI Class 1500, B16.5 Pipe Size (NPS) Outside Diameter of Flange A Thickness of Flange C Diameter of Raised Face T Diameter of Groove U Groove Width W Groove Depth X Number of Bolt Holes   Diameter of Bolt Holes   Bolt Circle Diameter 1/2 4 3/4 7/8 2 3/8 1 9/16 11/32 1/4 4 7/8 3 1/4 3/4 5 1/8 1 2 5/8 1 3/4 11/32 1/4 4 7/8 3 1/2 1 5 7/8 1 1/8 2 13/16 2 11/32 1/4 4 1 4 1 1/4 6 1/4 1 1/8 3 3/16 2 3/8 11/32 1/4 4 1 4 3/8 1 1/2 7 1 1/4 3 5/8 2 11/16 11/32 1/4 4 1 1/8 4 7/8 2 8 1/2 1 1/2 4 7/8 3 3/4 15/32 5/16 8 1 6 1/2 2 1/2 9 5/8 1 5/8 5 3/8 4 1/4 15/32 5/16 8 1 1/8 7 1/2 3 10 1/2 1 7/8 6 5/8 5 3/8 15/32 5/16 8 1 1/4 8 3 1/2 - - - - - - - - - 4 12 1/4 2 1/8 7 5/8 6 3/8 15/32 5/16 8 1 3/8 9 1/2 5 14 3/4 2 7/8 9 7 5/8 15/32 5/16 8 1 5/8 11 1/2 6 15 1/2 3 1/4 9 3/4 8 5/16 17/32 3/8 12 1 1/2 12 1/2 8 19 3 5/8 12 1/2 10 5/8 21/32 7/16 12 1 3/4 15 1/2 10 23 4 1/4 14 5/8 12 3/4 21/32 7/16 12 2 19 12 26 1/2 4 7/8 17 1/4 15 29/32 9/16 16 2 1/8 22 1/2 14 29 1/2 5 1/4 19 1/4 16 1/2 1 1/16 5/8 16 2 3/8 25 16 32 1/2 5 3/4 21 1/2 18 1/2 1 3/16 11/16 16 2 5/8 27 3/4 18 36 6 3/8 24 1/8 21 1 3/16 11/16 16 2 7/8 30 1/2 20 38 3/4 7 26 1/2 23 1 5/16 11/16 16 3 1/8 32 3/4 22 - - - - - - - - - 24 46 8 31 1/4 27 1/4 1 7/16 13/16 16 3 5/8 39

7. Blind Flange, ANSI Class 2500, B16.5 Pipe Size (NPS) Outside Diameter of Flange A Thickness of Flange C Diameter of Raised Face T Diameter of Groove U Groove Width W Groove Depth X Number of Bolt Holes   Diameter of Bolt Holes   Bolt Circle Diameter 1/2 5 1/4 1 3/16 2 9/16 1 11/16 11/32 1/4 4 7/8 3 1/2 3/4 5 1/2 1 1/4 2 7/8 2 11/32 1/4 4 7/8 3 3/4 1 6 1/4 1 3/8 3 1/4 2 3/8 11/32 1/4 4 1 4 1/4 1 1/4 7 1/4 1 1/2 4 2 27/32 15/32 5/16 4 1 1/8 5 1/8 1 1/2 8 1 3/4 4 1/2 3 1/4 15/32 5/16 4 1 1/4 5 3/4 2 9 1/4 2 5 1/4 4 15/32 5/16 8 1 1/8 6 3/4 2 1/2 10 1/2 2 1/4 5 7/8 4 3/8 17/32 3/8 8 1 1/4 7 3/4 3 12 2 5/8 6 5/8 5 17/32 3/8 8 1 3/8 9 3 1/2 - - - - - - - - - 4 14 3 8 6 3/16 22/51 7/16 8 1 5/8 10 3/4 5 16 1/2 3 5/8 9 1/2 7 1/2 21/32 1/2 8 1 7/8 12 3/4 6 19 4 1/4 11 9 25/32 1/2 8 2 1/8 14 1/2 8 21 3/4 5 13 3/8 11 29/32 9/16 12 2 1/8 17 1/4 10 26 1/2 6 1/2 16 3/4 13 1/2 1 3/16 11/16 12 2 5/8 21 1/4 12 30 7 1/4 19 1/2 16 1 5/16 11/16 12 2 7/8 24 3/8