ASME B16.5 Blind Flange
| Size | 1/2″ (15 NB) to 48″ (1200NB) |
| Standards | ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings. |
| Pressure Ratings | PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Pressure class | 150#, 300#, 600#, 1500# |
| Dimensions and Pressure Ratings for Blind Flanges | Table D, E, F, & H, MSS- SP-44, BS3293, ANSI, BS4504, PN6, 10, 16, 25, 64 BS10, DIN Standards |
| Flange Face Type | Raised Face (RF), Flate Face (FF), Ring Type Joint (RTJ) |
| Coating/Surface Treatment | Yellow Transparent, Anti-rust Paint, Oil Black Paint, Zinc Plated, Cold and Hot Dip Galvanized. |
|
Pipe Normal Diam.
|
O.D. Flange
|
Thk. Of Flange Min
|
Diameter of Raised Face
|
Diam.of BoltCircle
|
Diam.of BoltHoles
|
Numberof Bolts
|
Diam. ofBolts(inch)
|
Approx. Weight
|
||
|---|---|---|---|---|---|---|---|---|---|---|
|
inch
|
dn
|
O
|
C
|
G
|
BC
|
BH
|
BN
|
BD
|
KG/PCS
|
LB/PCS
|
|
1/2″
|
15
|
95.5
|
14.2
|
35.1
|
66.5
|
15.7
|
4
|
1/2″
|
0.8
|
1.8
|
|
3/4″
|
20
|
117. 5
|
15.7
|
42.9
|
82.6
|
19.1
|
4
|
5/8″
|
1.2
|
2.6
|
|
1″
|
25
|
124. 0
|
17.5
|
50.8
|
88.9
|
19.1
|
4
|
5/8″
|
1.5
|
3.3
|
|
1-1/4″
|
32
|
133. 5
|
19.1
|
63.5
|
98.6
|
19.1
|
4
|
5/8″
|
2
|
4.4
|
|
1-1/2″
|
40
|
155. 5
|
20.6
|
73.2
|
114.3
|
22.4
|
4
|
5/8″
|
2.9
|
6.4
|
|
2″
|
50
|
165. 0
|
22.4
|
91.9
|
127
|
19.1
|
8
|
5/8″
|
3.5
|
7.7
|
|
2-1/2″
|
65
|
190. 5
|
25.4
|
104.6
|
149.4
|
22.4
|
8
|
3/4″
|
5.3
|
11.7
|
|
3″
|
80
|
209. 5
|
28.4
|
127
|
168.1
|
22.4
|
8
|
3/4″
|
7.2
|
15.9
|
|
3-1/2″
|
90
|
228. 5
|
30.2
|
139.7
|
184.2
|
22.4
|
8
|
3/4″
|
9.2
|
20.3
|
|
4″
|
100
|
254. 0
|
31.8
|
157.2
|
200.2
|
22.4
|
8
|
3/4″
|
12.2
|
26.8
|
|
5″
|
125
|
279. 5
|
35.1
|
185.7
|
235
|
22.4
|
8
|
3/4″
|
16
|
35.2
|
|
6″
|
150
|
317. 5
|
36.6
|
215.9
|
269.7
|
22.4
|
12
|
3/4″
|
22
|
48.4
|
|
8″
|
200
|
381. 0
|
41.1
|
269.7
|
330.2
|
25.4
|
12
|
7/8″
|
36
|
79.5
|
|
10″
|
250
|
444. 5
|
47.8
|
323.9
|
387.4
|
28.4
|
16
|
1″
|
55
|
121
|
|
12″
|
300
|
520. 5
|
50.8
|
381
|
450.9
|
31.8
|
16
|
1 1/8″
|
82.5
|
182
|
|
14″
|
350
|
584. 0
|
53.8
|
412.8
|
514..4
|
31.8
|
20
|
1 1/8″
|
108
|
238
|
|
16″
|
400
|
647. 5
|
57.2
|
469.9
|
571.5
|
35.1
|
20
|
1 1/4″
|
139
|
306
|
|
18″
|
450
|
711. 0
|
60.5
|
533.4
|
628.7
|
35.1
|
24
|
1 1/4″
|
178
|
392
|
|
20″
|
500
|
774. 5
|
63.5
|
584.2
|
685.8
|
35.1
|
24
|
1 1/4″
|
228
|
503
|
|
24″
|
600
|
914. 5
|
69.9
|
692.2
|
812.8
|
41.1
|
24
|
1 1/2″
|
350
|
772
|
| Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm | Inside Diameter not applicable |
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm | Outside Diameter of Hub ≤ 12 = + 2.4 mm / – 1.6 mm | ≥ 14 = ± 3.2 mm |
| Diameter of Counterbore not applicable | Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mmEccentricity of Bolt Circle with Respect to Facing≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
| Thickness ≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0 | Length thru Hub ≤ 18 = + 3.2 mm / – 0.8 mm | ≥ 20 = + 4.8 mm / – 1.6 mm |
Carbon Steel Blind Flanges: ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8
Stainless Steel Blind Flanges: ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Alloy Steel Blind Flanges: ASTM A182 F1, F5, F9, F11, F22, F91
Special Alloy Blind Flanges: Duplex, Super Duplex, Nickel Alloys