In Depth: Blind Flanges
Blind Flange
A Blind Flange has no bore, and is used to close ends of piping systems. A blind flange also permits easy access to a line ones it has been sealed. The blind flange is sometimes machined to accept a pipe of the nominal Size to which reduction is being made. The reduction can be either threaded or welded.
Stainless Steel : ASTM A 182, A 240
Grade : F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L, Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Carbon Steel : ASTM A 105, ASTM A 181
Alloy Steel : ASTM A 182, GR F1, F11, F22, F5, F9, F91
Nickel Alloys : Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276
Copper Alloys : Copper, Brass & Gunmetal
Size : 1/8″ NB TO 48″NB.
Class : 150#, 300#,400 #,600#,900#, 1500# & 2500 #.
Standard
ANSI : ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
B.S : BS4504 , BS4504, BS1560, BS10
| 150# | ||||||||
| Branch NB | A | D | E | F | Gx.No. | Weight kg | ||
| 1/2″ (15) | 89 | 11,6 | 35.0 | 60.3 | 15.8 x 4 | 0.6 | ||
| 3/4″ (20) | 99 | 13.2 | 43.0 | 69.8 | 15.8 x 4 | 0.8 | ||
| 1″ (25) | 108 | 14.7 | 51.0 | 79.4 | 15.8 x 4 |
1.1 |
||
| 1 1/2″ (40) | 127 | 19.5 | 73.0 | 98.4 | 15.8 x 4 | 1.8 | ||
| 2″ (50) | 152 | 22.7 | 92.0 | 120.6 | 19.0 x 4 | 2.7 | ||
| 3″ (80) | 191 | 24.3 | 127.0 | 152.4 | 19.0 x 4 | 4.5 | ||
| 4″ (100) | 229 | 24.3 | 157.0 | 190.5 | 19.0 x 4 | 7.0 | ||
| 6″ (150) | 279 | 25.9 | 215.0 | 241.3 |
22.2 x 8 |
10.8 | ||
| 8″ (200) | 343 | 29.0 | 270.0 | 298.4 | 22.2 x 8 | 18.0 | ||
| 10″ (250) | 400 | 30.6 | 324.0 | 362.0 | 25.4 x 12 | 24.0 | ||
| 12″ (483) | 483 | 32.2 | 381.0 | 432 | 25.4 x 12 | 37.0 | ||
| 14″ (350) | 533 | 35.4 | 413.0 | 476.3 | 28.4 x 12 | 14.0 | ||
| 16″ (400) | 597 | 37.0 | 470.0 | 539.8 | 28.4 x 12 | 61.0 | ||
| 18″ (450) | 635 | 40.1 | 533.0 | 577.9 | 31.8 x 16 | 68.0 | ||
| 20″ (500) | 698 | 43.3 | 584.0 | 635.0 | 31.8 x 16 | 84.0 | ||
| 24″ (600) | 813 | 47.8 | 692.0 | 749.3 | 35.0 x 16 | 115.0 | ||
.
| 300# | ||||||||
| Branch NB | A | D | E | F | Gx.No. | Weight kg | ||
| 1/2″ (15) | 96 | 14.7 | 35.0 | 60.7 | 15.8 x 4 | 1.5 | ||
| 3/4″ (20) | 117 | 16.3 | 43.0 | 82.6 | 19.8 x 4 | 1.8 | ||
| 1″ (25) | 124 | 17.9 | 51.0 | 88.9 | 19.8 x 4 | 2.0 | ||
| 1 1/2″ (40) | 156 | 21.1 | 73.0 | 114.3 | 22.2 x 4 | 3.5 | ||
| 2″ (50) | 165 | 22.7 | 92.0 | 127.0 | 19.0 x 8 | 4.0 | ||
| 3″ (80) | 210 | 29.0 | 127.0 | 168.3 | 22.2 x 8 | 7.0 | ||
| 4″ (100) | 254 | 32.2 | 157.0 | 200.0 | 22.2 x 8 | 11.0 | ||
| 6″ (150) | 318 | 37.0 | 215.0 | 269.9 |
22.2 x 12 |
19.0 | ||
| 8″ (200) | 381 | 41.7 | 270.0 | 330.2 | 25.4 x 12 | 30.0 | ||
| 10″ (250) | 445 | 48.1 | 324.0 | 387.4 | 28,5 x 16 | 41.0 | ||
| 12″ (483) | 521 | 51.3 | 381.0 | 450.8 | 31.8 x 16 | 62.0 | ||
| 14″ (350) | 584 | 54.4 | 413.0 | 514.3 | 31.8 x 20 | 86.0 | ||
| 16″ (400) | 648 | 57.6 | 470.0 | 571.5 | 35.0 x 20 | 106.0 | ||
| 18″ (450) | 711 | 60.8 | 533.0 | 628.6 | 35.0 x 24 | 131.0 | ||
| 20″ (500) | 775 | 64.0 | 584.0 | 685.8 | 35.0 x 24 | 158.0 | ||
| 24″ (600) | 914 | 70.3 | 692.0 | 812.8 | 41.0 x 24 | 230.0 | ||
